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  • Weird FTP issue between Unity Express and Windows Server 2008 FTP

    - by user33975
    My VOIP specialist complained about not being able to run backups of the Unity Express onto our FTP server (Microsoft FTP on Server 2008). I did a packet trace and observed some weird behavior that I think is even kind of funny in a way. The Unity FTP client is able to initiate both control and data connections with no problem, even being able to LIST directories and CWD into them. But as soon as the client sends a SYST command (not sure why it cares), the server replies with "Windows_NT" and lo and behold...the client immediately sends a QUIT command! I've seen this happen consistently on my packet captures. I tried pointing the Unity FTP client to a FileZilla FTP server, and viola...it worked fine! Has anyone else observed this? I thought it was kinda funny, being that Cisco seems to not like Microsoft that much...

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  • Eclipse says "Access Denied" when running javaw and how to fix it?

    - by Eduardo de Luna
    I'm trying to get Eclipse to compile and run a HelloWorld class but it can't even do that. I have installed Eclipse x86 SDK 4.2.0 together bit with the latest JRE and JDK both in 64 bit as well. I also have the PATH variables set to respond to command prompts. When I try to run the following code: class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!" ) ; } } And it returns the following error: Exception occurred executing command line. Cannot run program "C:\Program Files\Java\jre7\bin\javaw.exe" (in directory "C:\Users\Default\workspace\devs"): CreateProcess error=5, Access is denied. Can you help me fix this? Thanks!

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  • C++ AMP Video Overview

    - by Daniel Moth
    I hope to be recording some C++ AMP screencasts for channel9 soon (you'll find them through my regular screencasts link on the left), and in all of them I will assume you have watched this short interview overview of C++ AMP.   Note: I think there were some technical problems with streaming so best to download the "High Quality WMV" or switch to progressive format. Comments about this post by Daniel Moth welcome at the original blog.

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  • Best choice for a personal "online backup" in Europe

    - by marc_s
    I'm looking for an online backup solution for personal use - besides all the usual requirements (like not too expensive, since it's for personal use), I'd like to add two requirements to it: data center should be in Europe (I don't want my personal data stored in the US, when the next crazed president comes along and wants to confiscate and rifle through everybody's files.....) the online backup store should be accessible through a drive letter in cmd.exe So far, I've looked at a few services, but none have totally convinced me: Dropbox is looking ok, but they insist on creating a silly "My Dropbox" directory in my data path - and there's no way I can choose that name. Sorry - "My everything" is for dummies - I don't like that, I like to name my files and folders according to my liking LiveDrive is OK, too - they offer European storage, drive letter and all - but those drive letters are only available in the Windows Explorer - and not on the cmd.exe command line :-( and since I do 99% of my work on the command line, this is a major drawback..... Any other services I haven't looked at worth checking out? Marc

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  • How to tune down the Hyperic built-in postgresql database for a small setup

    - by Svish
    We are testing out Hyperic 4.5.1 in a quite small environment for now. Currently there are just 1-5 agents and there probably won't be any more than 10-15. When I run ps ax there are 20(!) postgres processes running. For a small setup like this, that can't be necessary, can it? I'm a software developer and don't have much experience with setting up servers and such though, so don't really know. Either way, what settings are appropriate for a small Hyperic setup like this? Current, default and untouched configuration file, hqdb/data/postgresql.conf: # ----------------------------- # PostgreSQL configuration file # ----------------------------- # # This file consists of lines of the form: # # name = value # # (The '=' is optional.) White space may be used. Comments are introduced # with '#' anywhere on a line. The complete list of option names and # allowed values can be found in the PostgreSQL documentation. The # commented-out settings shown in this file represent the default values. # # Please note that re-commenting a setting is NOT sufficient to revert it # to the default value, unless you restart the server. # # Any option can also be given as a command line switch to the server, # e.g., 'postgres -c log_connections=on'. Some options can be changed at # run-time with the 'SET' SQL command. # # This file is read on server startup and when the server receives a # SIGHUP. If you edit the file on a running system, you have to SIGHUP the # server for the changes to take effect, or use "pg_ctl reload". Some # settings, which are marked below, require a server shutdown and restart # to take effect. # # Memory units: kB = kilobytes MB = megabytes GB = gigabytes # Time units: ms = milliseconds s = seconds min = minutes h = hours d = days #--------------------------------------------------------------------------- # FILE LOCATIONS #--------------------------------------------------------------------------- # The default values of these variables are driven from the -D command line # switch or PGDATA environment variable, represented here as ConfigDir. #data_directory = 'ConfigDir' # use data in another directory # (change requires restart) #hba_file = 'ConfigDir/pg_hba.conf' # host-based authentication file # (change requires restart) #ident_file = 'ConfigDir/pg_ident.conf' # ident configuration file # (change requires restart) # If external_pid_file is not explicitly set, no extra PID file is written. #external_pid_file = '(none)' # write an extra PID file # (change requires restart) #--------------------------------------------------------------------------- # CONNECTIONS AND AUTHENTICATION #--------------------------------------------------------------------------- # - Connection Settings - #listen_addresses = 'localhost' # what IP address(es) to listen on; # comma-separated list of addresses; # defaults to 'localhost', '*' = all # (change requires restart) port = 9432 # (change requires restart) max_connections = 100 # (change requires restart) # Note: increasing max_connections costs ~400 bytes of shared memory per # connection slot, plus lock space (see max_locks_per_transaction). You # might also need to raise shared_buffers to support more connections. #superuser_reserved_connections = 3 # (change requires restart) #unix_socket_directory = '' # (change requires restart) #unix_socket_group = '' # (change requires restart) #unix_socket_permissions = 0777 # octal # (change requires restart) #bonjour_name = '' # defaults to the computer name # (change requires restart) # - Security & Authentication - #authentication_timeout = 1min # 1s-600s #ssl = off # (change requires restart) #password_encryption = on #db_user_namespace = off # Kerberos #krb_server_keyfile = '' # (change requires restart) #krb_srvname = 'postgres' # (change requires restart) #krb_server_hostname = '' # empty string matches any keytab entry # (change requires restart) #krb_caseins_users = off # (change requires restart) # - TCP Keepalives - # see 'man 7 tcp' for details #tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds; # 0 selects the system default #tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds; # 0 selects the system default #tcp_keepalives_count = 0 # TCP_KEEPCNT; # 0 selects the system default #--------------------------------------------------------------------------- # RESOURCE USAGE (except WAL) #--------------------------------------------------------------------------- # - Memory - shared_buffers = 64MB # min 128kB or max_connections*16kB # (change requires restart) #temp_buffers = 8MB # min 800kB #max_prepared_transactions = 5 # can be 0 or more # (change requires restart) # Note: increasing max_prepared_transactions costs ~600 bytes of shared memory # per transaction slot, plus lock space (see max_locks_per_transaction). work_mem = 2MB # min 64kB maintenance_work_mem = 32MB # min 1MB #max_stack_depth = 2MB # min 100kB # - Free Space Map - max_fsm_pages = 204800 # min max_fsm_relations*16, 6 bytes each # (change requires restart) #max_fsm_relations = 1000 # min 100, ~70 bytes each # (change requires restart) # - Kernel Resource Usage - #max_files_per_process = 1000 # min 25 # (change requires restart) #shared_preload_libraries = '' # (change requires restart) # - Cost-Based Vacuum Delay - #vacuum_cost_delay = 0 # 0-1000 milliseconds #vacuum_cost_page_hit = 1 # 0-10000 credits #vacuum_cost_page_miss = 10 # 0-10000 credits #vacuum_cost_page_dirty = 20 # 0-10000 credits #vacuum_cost_limit = 200 # 0-10000 credits # - Background writer - #bgwriter_delay = 200ms # 10-10000ms between rounds #bgwriter_lru_percent = 1.0 # 0-100% of LRU buffers scanned/round #bgwriter_lru_maxpages = 5 # 0-1000 buffers max written/round #bgwriter_all_percent = 0.333 # 0-100% of all buffers scanned/round #bgwriter_all_maxpages = 5 # 0-1000 buffers max written/round #--------------------------------------------------------------------------- # WRITE AHEAD LOG #--------------------------------------------------------------------------- # - Settings - fsync = on # turns forced synchronization on or off #wal_sync_method = fsync # the default is the first option # supported by the operating system: # open_datasync # fdatasync # fsync # fsync_writethrough # open_sync #full_page_writes = on # recover from partial page writes #wal_buffers = 64kB # min 32kB # (change requires restart) commit_delay = 100000 # range 0-100000, in microseconds #commit_siblings = 5 # range 1-1000 # - Checkpoints - checkpoint_segments = 10 # in logfile segments, min 1, 16MB each #checkpoint_timeout = 5min # range 30s-1h #checkpoint_warning = 30s # 0 is off # - Archiving - #archive_command = '' # command to use to archive a logfile segment #archive_timeout = 0 # force a logfile segment switch after this # many seconds; 0 is off #--------------------------------------------------------------------------- # QUERY TUNING #--------------------------------------------------------------------------- # - Planner Method Configuration - #enable_bitmapscan = on #enable_hashagg = on #enable_hashjoin = on #enable_indexscan = on #enable_mergejoin = on #enable_nestloop = on #enable_seqscan = on #enable_sort = on #enable_tidscan = on # - Planner Cost Constants - #seq_page_cost = 1.0 # measured on an arbitrary scale #random_page_cost = 4.0 # same scale as above #cpu_tuple_cost = 0.01 # same scale as above #cpu_index_tuple_cost = 0.005 # same scale as above #cpu_operator_cost = 0.0025 # same scale as above #effective_cache_size = 128MB # - Genetic Query Optimizer - #geqo = on #geqo_threshold = 12 #geqo_effort = 5 # range 1-10 #geqo_pool_size = 0 # selects default based on effort #geqo_generations = 0 # selects default based on effort #geqo_selection_bias = 2.0 # range 1.5-2.0 # - Other Planner Options - #default_statistics_target = 10 # range 1-1000 #constraint_exclusion = off #from_collapse_limit = 8 #join_collapse_limit = 8 # 1 disables collapsing of explicit # JOINs #--------------------------------------------------------------------------- # ERROR REPORTING AND LOGGING #--------------------------------------------------------------------------- # - Where to Log - log_destination = 'stderr' # Valid values are combinations of # stderr, syslog and eventlog, # depending on platform. # This is used when logging to stderr: redirect_stderr = on # Enable capturing of stderr into log # files # (change requires restart) # These are only used if redirect_stderr is on: log_directory = '../../logs' # Directory where log files are written # Can be absolute or relative to PGDATA log_filename = 'hqdb-%Y-%m-%d.log' # Log file name pattern. # Can include strftime() escapes #log_truncate_on_rotation = off # If on, any existing log file of the same # name as the new log file will be # truncated rather than appended to. But # such truncation only occurs on # time-driven rotation, not on restarts # or size-driven rotation. Default is # off, meaning append to existing files # in all cases. log_rotation_age = 1d # Automatic rotation of logfiles will # happen after that time. 0 to # disable. #log_rotation_size = 10MB # Automatic rotation of logfiles will # happen after that much log # output. 0 to disable. # These are relevant when logging to syslog: #syslog_facility = 'LOCAL0' #syslog_ident = 'postgres' # - When to Log - #client_min_messages = notice # Values, in order of decreasing detail: # debug5 # debug4 # debug3 # debug2 # debug1 # log # notice # warning # error #log_min_messages = notice # Values, in order of decreasing detail: # debug5 # debug4 # debug3 # debug2 # debug1 # info # notice # warning # error # log # fatal # panic #log_error_verbosity = default # terse, default, or verbose messages #log_min_error_statement = error # Values in order of increasing severity: # debug5 # debug4 # debug3 # debug2 # debug1 # info # notice # warning # error # fatal # panic (effectively off) log_min_duration_statement = 10000 # -1 is disabled, 0 logs all statements # and their durations. #silent_mode = off # DO NOT USE without syslog or # redirect_stderr # (change requires restart) # - What to Log - #debug_print_parse = off #debug_print_rewritten = off #debug_print_plan = off #debug_pretty_print = off #log_connections = off #log_disconnections = off #log_duration = off #log_line_prefix = '' # Special values: # %u = user name # %d = database name # %r = remote host and port # %h = remote host # %p = PID # %t = timestamp (no milliseconds) # %m = timestamp with milliseconds # %i = command tag # %c = session id # %l = session line number # %s = session start timestamp # %x = transaction id # %q = stop here in non-session # processes # %% = '%' # e.g. '<%u%%%d> ' #log_statement = 'none' # none, ddl, mod, all #log_hostname = off #--------------------------------------------------------------------------- # RUNTIME STATISTICS #--------------------------------------------------------------------------- # - Query/Index Statistics Collector - #stats_command_string = on #update_process_title = on stats_start_collector = on # needed for block or row stats # (change requires restart) stats_block_level = on stats_row_level = on stats_reset_on_server_start = off # (change requires restart) # - Statistics Monitoring - #log_parser_stats = off #log_planner_stats = off #log_executor_stats = off #log_statement_stats = off #--------------------------------------------------------------------------- # AUTOVACUUM PARAMETERS #--------------------------------------------------------------------------- #autovacuum = off # enable autovacuum subprocess? # 'on' requires stats_start_collector # and stats_row_level to also be on #autovacuum_naptime = 1min # time between autovacuum runs #autovacuum_vacuum_threshold = 500 # min # of tuple updates before # vacuum #autovacuum_analyze_threshold = 250 # min # of tuple updates before # analyze #autovacuum_vacuum_scale_factor = 0.2 # fraction of rel size before # vacuum #autovacuum_analyze_scale_factor = 0.1 # fraction of rel size before # analyze #autovacuum_freeze_max_age = 200000000 # maximum XID age before forced vacuum # (change requires restart) #autovacuum_vacuum_cost_delay = -1 # default vacuum cost delay for # autovacuum, -1 means use # vacuum_cost_delay #autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for # autovacuum, -1 means use # vacuum_cost_limit #--------------------------------------------------------------------------- # CLIENT CONNECTION DEFAULTS #--------------------------------------------------------------------------- # - Statement Behavior - #search_path = '"$user",public' # schema names #default_tablespace = '' # a tablespace name, '' uses # the default #check_function_bodies = on #default_transaction_isolation = 'read committed' #default_transaction_read_only = off #statement_timeout = 0 # 0 is disabled #vacuum_freeze_min_age = 100000000 # - Locale and Formatting - datestyle = 'iso, mdy' #timezone = unknown # actually, defaults to TZ # environment setting #timezone_abbreviations = 'Default' # select the set of available timezone # abbreviations. Currently, there are # Default # Australia # India # However you can also create your own # file in share/timezonesets/. #extra_float_digits = 0 # min -15, max 2 #client_encoding = sql_ascii # actually, defaults to database # encoding # These settings are initialized by initdb -- they might be changed lc_messages = 'C' # locale for system error message # strings lc_monetary = 'C' # locale for monetary formatting lc_numeric = 'C' # locale for number formatting lc_time = 'C' # locale for time formatting # - Other Defaults - #explain_pretty_print = on #dynamic_library_path = '$libdir' #local_preload_libraries = '' #--------------------------------------------------------------------------- # LOCK MANAGEMENT #--------------------------------------------------------------------------- #deadlock_timeout = 1s #max_locks_per_transaction = 64 # min 10 # (change requires restart) # Note: each lock table slot uses ~270 bytes of shared memory, and there are # max_locks_per_transaction * (max_connections + max_prepared_transactions) # lock table slots. #--------------------------------------------------------------------------- # VERSION/PLATFORM COMPATIBILITY #--------------------------------------------------------------------------- # - Previous Postgres Versions - #add_missing_from = off #array_nulls = on #backslash_quote = safe_encoding # on, off, or safe_encoding #default_with_oids = off #escape_string_warning = on #standard_conforming_strings = off #regex_flavor = advanced # advanced, extended, or basic #sql_inheritance = on # - Other Platforms & Clients - #transform_null_equals = off #--------------------------------------------------------------------------- # CUSTOMIZED OPTIONS #--------------------------------------------------------------------------- #custom_variable_classes = '' # list of custom variable class names SELECT * FROM pg_stat_activity; datid | datname | procpid | usesysid | usename | current_query | waiting | query_start | backend_start | client_addr | client_port -------+---------+---------+----------+---------+---------------------------------+---------+-------------------------------+-------------------------------+-------------+------------- 16384 | hqdb | 3267 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.036781+01 | 2011-02-08 15:51:20.02413+01 | 127.0.0.1 | 47892 16384 | hqdb | 3268 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.050994+01 | 2011-02-08 15:51:20.047393+01 | 127.0.0.1 | 47893 16384 | hqdb | 3269 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.056661+01 | 2011-02-08 15:51:20.053201+01 | 127.0.0.1 | 47894 16384 | hqdb | 3271 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.062351+01 | 2011-02-08 15:51:20.058822+01 | 127.0.0.1 | 47895 16384 | hqdb | 3272 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.068328+01 | 2011-02-08 15:51:20.064517+01 | 127.0.0.1 | 47896 16384 | hqdb | 3273 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.07444+01 | 2011-02-08 15:51:20.070755+01 | 127.0.0.1 | 47897 16384 | hqdb | 3274 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.080941+01 | 2011-02-08 15:51:20.076983+01 | 127.0.0.1 | 47898 16384 | hqdb | 3275 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.08741+01 | 2011-02-08 15:51:20.083697+01 | 127.0.0.1 | 47899 16384 | hqdb | 3276 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:20.093597+01 | 2011-02-08 15:51:20.089977+01 | 127.0.0.1 | 47900 16384 | hqdb | 3277 | 10 | hqadmin | <IDLE> in transaction | f | 2011-02-08 15:51:20.133974+01 | 2011-02-08 15:51:20.096149+01 | 127.0.0.1 | 47901 16384 | hqdb | 3308 | 10 | hqadmin | <IDLE> | f | 2011-02-09 10:49:27.402197+01 | 2011-02-08 15:51:29.826321+01 | 127.0.0.1 | 47902 16384 | hqdb | 3309 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:55.572395+01 | 2011-02-08 15:51:29.865243+01 | 127.0.0.1 | 47903 16384 | hqdb | 3310 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:55.586273+01 | 2011-02-08 15:51:29.874346+01 | 127.0.0.1 | 47904 16384 | hqdb | 3311 | 10 | hqadmin | <IDLE> | f | 2011-02-09 10:10:03.024088+01 | 2011-02-08 15:51:29.883598+01 | 127.0.0.1 | 47905 16384 | hqdb | 3312 | 10 | hqadmin | <IDLE> in transaction | f | 2011-02-08 15:51:35.804457+01 | 2011-02-08 15:51:29.892925+01 | 127.0.0.1 | 47906 16384 | hqdb | 3418 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:55.580207+01 | 2011-02-08 15:51:55.56911+01 | 127.0.0.1 | 47910 16384 | hqdb | 3419 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:55.59781+01 | 2011-02-08 15:51:55.588609+01 | 127.0.0.1 | 47911 16384 | hqdb | 3422 | 10 | hqadmin | <IDLE> | f | 2011-02-09 10:10:02.668836+01 | 2011-02-08 15:51:55.603076+01 | 127.0.0.1 | 47914 16384 | hqdb | 3421 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:55.770427+01 | 2011-02-08 15:51:55.603086+01 | 127.0.0.1 | 47913 16384 | hqdb | 3420 | 10 | hqadmin | <IDLE> | f | 2011-02-08 15:51:55.680785+01 | 2011-02-08 15:51:55.637058+01 | 127.0.0.1 | 47912 16384 | hqdb | 18233 | 10 | hqadmin | SELECT * FROM pg_stat_activity; | f | 2011-02-09 10:49:29.688949+01 | 2011-02-09 10:48:13.031475+01 | | -1 (21 rows)

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  • First round playing with Memcached

    - by Shaun
    To be honest I have not been very interested in the caching before I’m going to a project which would be using the multi-site deployment and high connection and concurrency and very sensitive to the user experience. That means we must cache the output data for better performance. After looked for the Internet I finally focused on the Memcached. What’s the Memcached? I think the description on its main site gives us a very good and simple explanation. Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load. Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering. Memcached is simple yet powerful. Its simple design promotes quick deployment, ease of development, and solves many problems facing large data caches. Its API is available for most popular languages. The original Memcached was built on *nix system are is being widely used in the PHP world. Although it’s not a problem to use the Memcached installed on *nix system there are some windows version available fortunately. Since we are WISC (Windows – IIS – SQL Server – C#, which on the opposite of LAMP) it would be much easier for us to use the Memcached on Windows rather than *nix. I’m using the Memcached Win X64 version provided by NorthScale. There are also the x86 version and other operation system version.   Install Memcached Unpack the Memcached file to a folder on the machine you want it to be installed, we can see that there are only 3 files and the main file should be the “memcached.exe”. Memcached would be run on the server as a service. To install the service just open a command windows and navigate to the folder which contains the “memcached.exe”, let’s say “C:\Memcached\”, and then type “memcached.exe -d install”. If you are using Windows Vista and Windows 7 system please be execute the command through the administrator role. Right-click the command item in the start menu and use “Run as Administrator”, otherwise the Memcached would not be able to be installed successfully. Once installed successful we can type “memcached.exe -d start” to launch the service. Now it’s ready to be used. The default port of Memcached is 11211 but you can change it through the command argument. You can find the help by typing “memcached -h”.   Using Memcached Memcahed has many good and ready-to-use providers for vary program language. After compared and reviewed I chose the Memcached Providers. It’s built based on another 3rd party Memcached client named enyim.com Memcached Client. The Memcached Providers is very simple to set/get the cached objects through the Memcached servers and easy to be configured through the application configuration file (aka web.config and app.config). Let’s create a console application for the demonstration and add the 3 DLL files from the package of the Memcached Providers to the project reference. Then we need to add the configuration for the Memcached server. Create an App.config file and firstly add the section on top of it. Here we need three sections: the section for Memcached Providers, for enyim.com Memcached client and the log4net. 1: <configSections> 2: <section name="cacheProvider" 3: type="MemcachedProviders.Cache.CacheProviderSection, MemcachedProviders" 4: allowDefinition="MachineToApplication" 5: restartOnExternalChanges="true"/> 6: <sectionGroup name="enyim.com"> 7: <section name="memcached" 8: type="Enyim.Caching.Configuration.MemcachedClientSection, Enyim.Caching"/> 9: </sectionGroup> 10: <section name="log4net" 11: type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/> 12: </configSections> Then we will add the configuration for 3 of them in the App.config file. The Memcached server information would be defined under the enyim.com section since it will be responsible for connect to the Memcached server. Assuming I installed the Memcached on two servers with the default port, the configuration would be like this. 1: <enyim.com> 2: <memcached> 3: <servers> 4: <!-- put your own server(s) here--> 5: <add address="192.168.0.149" port="11211"/> 6: <add address="10.10.20.67" port="11211"/> 7: </servers> 8: <socketPool minPoolSize="10" maxPoolSize="100" connectionTimeout="00:00:10" deadTimeout="00:02:00"/> 9: </memcached> 10: </enyim.com> Memcached supports the multi-deployment which means you can install the Memcached on the servers as many as you need. The protocol of the Memcached responsible for routing the cached objects into the proper server. So it’s very easy to scale-out your system by Memcached. And then define the Memcached Providers configuration. The defaultExpireTime indicates how long the objected cached in the Memcached would be expired, the default value is 2000 ms. 1: <cacheProvider defaultProvider="MemcachedCacheProvider"> 2: <providers> 3: <add name="MemcachedCacheProvider" 4: type="MemcachedProviders.Cache.MemcachedCacheProvider, MemcachedProviders" 5: keySuffix="_MySuffix_" 6: defaultExpireTime="2000"/> 7: </providers> 8: </cacheProvider> The last configuration would be the log4net. 1: <log4net> 2: <!-- Define some output appenders --> 3: <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender"> 4: <layout type="log4net.Layout.PatternLayout"> 5: <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline"/> 6: </layout> 7: </appender> 8: <!--<threshold value="OFF" />--> 9: <!-- Setup the root category, add the appenders and set the default priority --> 10: <root> 11: <priority value="WARN"/> 12: <appender-ref ref="ConsoleAppender"> 13: <filter type="log4net.Filter.LevelRangeFilter"> 14: <levelMin value="WARN"/> 15: <levelMax value="FATAL"/> 16: </filter> 17: </appender-ref> 18: </root> 19: </log4net>   Get, Set and Remove the Cached Objects Once we finished the configuration it would be very simple to consume the Memcached servers. The Memcached Providers gives us a static class named DistCache that can be used to operate the Memcached servers. Get<T>: Retrieve the cached object from the Memcached servers. If failed it will return null or the default value. Add: Add an object with a unique key into the Memcached servers. Assuming that we have an operation that retrieve the email from the name which is time consuming. This is the operation that should be cached. The method would be like this. I utilized Thread.Sleep to simulate the long-time operation. 1: static string GetEmailByNameSlowly(string name) 2: { 3: Thread.Sleep(2000); 4: return name + "@ethos.com.cn"; 5: } Then in the real retrieving method we will firstly check whether the name, email information had been searched previously and cached. If yes we will just return them from the Memcached, otherwise we will invoke the slowly method to retrieve it and then cached. 1: static string GetEmailByName(string name) 2: { 3: var email = DistCache.Get<string>(name); 4: if (string.IsNullOrEmpty(email)) 5: { 6: Console.WriteLine("==> The name/email not be in memcached so need slow loading. (name = {0})==>", name); 7: email = GetEmailByNameSlowly(name); 8: DistCache.Add(name, email); 9: } 10: else 11: { 12: Console.WriteLine("==> The name/email had been in memcached. (name = {0})==>", name); 13: } 14: return email; 15: } Finally let’s finished the calling method and execute. 1: static void Main(string[] args) 2: { 3: var name = string.Empty; 4: while (name != "q") 5: { 6: Console.Write("==> Please enter the name to find the email: "); 7: name = Console.ReadLine(); 8:  9: var email = GetEmailByName(name); 10: Console.WriteLine("==> The email of {0} is {1}.", name, email); 11: } 12: } The first time I entered “ziyanxu” it takes about 2 seconds to get the email since there’s nothing cached. But the next time I entered “ziyanxu” it returned very quickly from the Memcached.   Summary In this post I explained a bit on why we need cache, what’s Memcached and how to use it through the C# application. The example is fairly simple but hopefully demonstrated on how to use it. Memcached is very easy and simple to be used since it gives you the full opportunity to consider what, when and how to cache the objects. And when using Memcached you don’t need to consider the cache servers. The Memcached would be like a huge object pool in front of you. The next step I’m thinking now are: What kind of data should be cached? And how to determined the key? How to implement the cache as a layer on top of the business layer so that the application will not notice that the cache is there. How to implement the cache by AOP so that the business logic no need to consider the cache. I will investigate on them in the future and will share my thoughts and results.   Hope this helps, Shaun All documents and related graphics, codes are provided "AS IS" without warranty of any kind. Copyright © Shaun Ziyan Xu. This work is licensed under the Creative Commons License.

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  • Replacing “if”s with your own number system

    - by Michael Williamson
    During our second code retreat at Red Gate, the restriction for one of the sessions was disallowing the use of if statements. That includes other constructs that have the same effect, such as switch statements or loops that will only be executed zero or one times. The idea is to encourage use of polymorphism instead, and see just how far it can be used to get rid of “if”s. The main place where people struggled to get rid of numbers from their implementation of Conway’s Game of Life was the piece of code that decides whether a cell is live or dead in the next generation. For instance, for a cell that’s currently live, the code might look something like this: if (numberOfNeighbours == 2 || numberOfNeighbours == 3) { return CellState.LIVE; } else { return CellState.DEAD; } The problem is that we need to change behaviour depending on the number of neighbours each cell has, but polymorphism only allows us to switch behaviour based on the type of a value. It follows that the solution is to make different numbers have different types: public interface IConwayNumber { IConwayNumber Increment(); CellState LiveCellNextGeneration(); } public class Zero : IConwayNumber { public IConwayNumber Increment() { return new One(); } public CellState LiveCellNextGeneration() { return CellState.DEAD; } } public class One : IConwayNumber { public IConwayNumber Increment() { return new Two(); } public CellState LiveCellNextGeneration() { return CellState.LIVE; } } public class Two : IConwayNumber { public IConwayNumber Increment() { return new ThreeOrMore(); } public CellState LiveCellNextGeneration() { return CellState.LIVE; } } public class ThreeOrMore : IConwayNumber { public IConwayNumber Increment() { return this; } public CellState LiveCellNextGeneration() { return CellState.DEAD; } } In the code that counts the number of neighbours, we use our new number system by starting with Zero and incrementing when we find a neighbour. To choose the next state of the cell, rather than inspecting the number of neighbours, we ask the number of neighbours for the next state directly: return numberOfNeighbours.LiveCellNextGeneration(); And now we have no “if”s! If C# had double-dispatch, or if we used the visitor pattern, we could move the logic for choosing the next cell out of the number classes, which might feel a bit more natural. I suspect that reimplementing the natural numbers is still going to feel about the same amount of crazy though.

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  • Amazon EC2 EBS volume scheduled backup/snapshots using puppet

    - by Ehrann Mehdan
    I am not a Linux admin, although I wish I was, and I have seen these questions Amazon EC2 Backup Strategy Amazon EC2 + EBS:: Regular backup plan? Simple Backup Strategy for Amazon EC2 instances / volumes? And this suggestion http://alestic.com/2009/09/ec2-consistent-snapshot I tried using command line + crontab (the command line works, but crontab for some reason, doesn't) But I'm still pretty lost, all I want is an automated, rolling backup of my amazon EC2 (EBS) data (by rolling I mean keep 3-4 weeks back, but delete old snapshots as new ones come for cost control) And as things usually go, if there is something that is hard and painful, someone creates a solution for it. My question is simple, is there a way using a tool like Puppet to do it without a painful learning curve? (or via other tools like http://ylastic.com) If yes, how?

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  • SQL Server Express 2008 R2 Installation error at Windows 7

    - by Shai Sherman
    Hello, I created install script that will install SQL Server 2008 R2 on windows XP SP3, windows vista and windows 7. One of the command that i used in the installation is for silent installation of SQL Server 2008 R2. When i install it on windows XP everything works just fine but when i try to install it on Windows 7 i get an error. What am I doing wrong? Here is the command line that i use: "Setup.exe /ConfigurationFile=Mysetup.ini" Mysetup.ini file: -------------------------------------Start of ini file --------------------------------- ;SQL SERVER 2008 R2 Configuration File ;Version 1.0, 5 May 2010 ; [SQLSERVER2008] ; Specify the Instance ID for the SQL Server features you have specified. SQL Server directory structure, registry structure, and service names will reflect the instance ID of the SQL Server instance. INSTANCEID="MSSQLSERVER" ; Specifies a Setup work flow, like INSTALL, UNINSTALL, or UPGRADE. This is a required parameter. ACTION="Install" ; Specifies features to install, uninstall, or upgrade. The list of top-level features include SQL, AS, RS, IS, and Tools. The SQL feature will install the database engine, replication, and full-text. The Tools feature will install Management Tools, Books online, Business Intelligence Development Studio, and other shared components. FEATURES=SQLENGINE ; Displays the command line parameters usage HELP="False" ; Specifies that the detailed Setup log should be piped to the console. INDICATEPROGRESS="False" ; Setup will not display any user interface. QUIET="False" ; Setup will display progress only without any user interaction. QUIETSIMPLE="True" ; Specifies that Setup should install into WOW64. This command line argument is not supported on an IA64 or a 32-bit system. ;X86="False" ; Specifies the path to the installation media folder where setup.exe is located. ;MEDIASOURCE="z:\" ; Detailed help for command line argument ENU has not been defined yet. ENU="True" ; Parameter that controls the user interface behavior. Valid values are Normal for the full UI, and AutoAdvance for a simplied UI. ; UIMODE="Normal" ; Specify if errors can be reported to Microsoft to improve future SQL Server releases. Specify 1 or True to enable and 0 or False to disable this feature. ERRORREPORTING="False" ; Specify the root installation directory for native shared components. ;INSTALLSHAREDDIR="D:\Program Files\Microsoft SQL Server" ; Specify the root installation directory for the WOW64 shared components. ;INSTALLSHAREDWOWDIR="D:\Program Files (x86)\Microsoft SQL Server" ; Specify the installation directory. ;INSTANCEDIR="D:\Program Files\Microsoft SQL Server" ; Specify that SQL Server feature usage data can be collected and sent to Microsoft. Specify 1 or True to enable and 0 or False to disable this feature. SQMREPORTING="False" ; Specify a default or named instance. MSSQLSERVER is the default instance for non-Express editions and SQLExpress for Express editions. This parameter is required when installing the SQL Server Database Engine (SQL), Analysis Services (AS), or Reporting Services (RS). INSTANCENAME="SQLEXPRESS" SECURITYMODE=SQL SAPWD=SystemAdmin ; Agent account name AGTSVCACCOUNT="NT AUTHORITY\NETWORK SERVICE" ; Auto-start service after installation. AGTSVCSTARTUPTYPE="Manual" ; Startup type for Integration Services. ;ISSVCSTARTUPTYPE="Automatic" ; Account for Integration Services: Domain\User or system account. ;ISSVCACCOUNT="NT AUTHORITY\NetworkService" ; Controls the service startup type setting after the service has been created. ;ASSVCSTARTUPTYPE="Automatic" ; The collation to be used by Analysis Services. ;ASCOLLATION="Latin1_General_CI_AS" ; The location for the Analysis Services data files. ;ASDATADIR="Data" ; The location for the Analysis Services log files. ;ASLOGDIR="Log" ; The location for the Analysis Services backup files. ;ASBACKUPDIR="Backup" ; The location for the Analysis Services temporary files. ;ASTEMPDIR="Temp" ; The location for the Analysis Services configuration files. ;ASCONFIGDIR="Config" ; Specifies whether or not the MSOLAP provider is allowed to run in process. ;ASPROVIDERMSOLAP="1" ; A port number used to connect to the SharePoint Central Administration web application. ;FARMADMINPORT="0" ; Startup type for the SQL Server service. SQLSVCSTARTUPTYPE="Automatic" ; Level to enable FILESTREAM feature at (0, 1, 2 or 3). FILESTREAMLEVEL="0" ; Set to "1" to enable RANU for SQL Server Express. ENABLERANU="1" ; Specifies a Windows collation or an SQL collation to use for the Database Engine. SQLCOLLATION="SQL_Latin1_General_CP1_CI_AS" ; Account for SQL Server service: Domain\User or system account. SQLSVCACCOUNT="NT Authority\System" ; Default directory for the Database Engine user databases. ;SQLUSERDBDIR="K:\Microsoft SQL Server\MSSQL\Data" ; Default directory for the Database Engine user database logs. ;SQLUSERDBLOGDIR="L:\Microsoft SQL Server\MSSQL\Data\Logs" ; Directory for Database Engine TempDB files. ;SQLTEMPDBDIR="T:\Microsoft SQL Server\MSSQL\Data" ; Directory for the Database Engine TempDB log files. ;SQLTEMPDBLOGDIR="T:\Microsoft SQL Server\MSSQL\Data\Logs" ; Provision current user as a Database Engine system administrator for SQL Server 2008 R2 Express. ADDCURRENTUSERASSQLADMIN="True" ; Specify 0 to disable or 1 to enable the TCP/IP protocol. TCPENABLED="1" ; Specify 0 to disable or 1 to enable the Named Pipes protocol. NPENABLED="0" ; Startup type for Browser Service. BROWSERSVCSTARTUPTYPE="Automatic" ; Specifies how the startup mode of the report server NT service. When ; Manual - Service startup is manual mode (default). ; Automatic - Service startup is automatic mode. ; Disabled - Service is disabled ;RSSVCSTARTUPTYPE="Automatic" ; Specifies which mode report server is installed in. ; Default value: “FilesOnly” ;RSINSTALLMODE="FilesOnlyMode" ; Accept SQL Server 2008 R2 license terms IACCEPTSQLSERVERLICENSETERMS="TRUE" ;setup.exe /CONFIGURATIONFILE=Mysetup.ini /INDICATEPROGRESS --------------------------- End of ini file ------------------------------------- And i get this error: 2010-08-31 18:05:53 Slp: Error result: -2068119551 2010-08-31 18:05:53 Slp: Result facility code: 1211 2010-08-31 18:05:53 Slp: Result error code: 1 2010-08-31 18:05:53 Slp: Sco: Attempting to create base registry key HKEY_LOCAL_MACHINE, machine 2010-08-31 18:05:53 Slp: Sco: Attempting to open registry subkey 2010-08-31 18:05:53 Slp: Sco: Attempting to open registry subkey Software\Microsoft\PCHealth\ErrorReporting\DW\Installed 2010-08-31 18:05:53 Slp: Sco: Attempting to get registry value DW0200 2010-08-31 18:05:53 Slp: Submitted 1 of 1 failures to the Watson data repository What the meaning of this? What do i need to do to fix that problem? Here is the Summary file: Overall summary: Final result: SQL Server installation failed. To continue, investigate the reason for the failure, correct the problem, uninstall SQL Server, and then rerun SQL Server Setup. Exit code (Decimal): -2068119551 Exit facility code: 1211 Exit error code: 1 Exit message: SQL Server installation failed. To continue, investigate the reason for the failure, correct the problem, uninstall SQL Server, and then rerun SQL Server Setup. Start time: 2010-08-31 18:03:44 End time: 2010-08-31 18:05:51 Requested action: Install Log with failure: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20100831_180236\Detail.txt Exception help link: http%3a%2f%2fgo.microsoft.com%2ffwlink%3fLinkId%3d20476%26ProdName%3dMicrosoft%2bSQL%2bServer%26EvtSrc%3dsetup.rll%26EvtID%3d50000%26ProdVer%3d10.50.1600.1%26EvtType%3d0x6121810A%400xC24842DB Machine Properties: Machine name: NVR Machine processor count: 2 OS version: Windows 7 OS service pack: OS region: United States OS language: English (United States) OS architecture: x86 Process architecture: 32 Bit OS clustered: No Product features discovered: Product Instance Instance ID Feature Language Edition Version Clustered Package properties: Description: SQL Server Database Services 2008 R2 ProductName: SQL Server 2008 R2 Type: RTM Version: 10 SPLevel: 0 Installation location: C:\Disk1\setupsql\x86\setup\ Installation edition: EXPRESS User Input Settings: ACTION: Install ADDCURRENTUSERASSQLADMIN: True AGTSVCACCOUNT: NT AUTHORITY\NETWORK SERVICE AGTSVCPASSWORD: * AGTSVCSTARTUPTYPE: Disabled ASBACKUPDIR: Backup ASCOLLATION: Latin1_General_CI_AS ASCONFIGDIR: Config ASDATADIR: Data ASDOMAINGROUP: ASLOGDIR: Log ASPROVIDERMSOLAP: 1 ASSVCACCOUNT: ASSVCPASSWORD: * ASSVCSTARTUPTYPE: Automatic ASSYSADMINACCOUNTS: ASTEMPDIR: Temp BROWSERSVCSTARTUPTYPE: Automatic CONFIGURATIONFILE: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20100831_180236\ConfigurationFile.ini CUSOURCE: ENABLERANU: True ENU: True ERRORREPORTING: False FARMACCOUNT: FARMADMINPORT: 0 FARMPASSWORD: * FEATURES: SQLENGINE FILESTREAMLEVEL: 0 FILESTREAMSHARENAME: FTSVCACCOUNT: FTSVCPASSWORD: * HELP: False IACCEPTSQLSERVERLICENSETERMS: True INDICATEPROGRESS: False INSTALLSHAREDDIR: C:\Program Files\Microsoft SQL Server\ INSTALLSHAREDWOWDIR: C:\Program Files\Microsoft SQL Server\ INSTALLSQLDATADIR: INSTANCEDIR: C:\Program Files\Microsoft SQL Server\ INSTANCEID: MSSQLSERVER INSTANCENAME: SQLEXPRESS ISSVCACCOUNT: NT AUTHORITY\NetworkService ISSVCPASSWORD: * ISSVCSTARTUPTYPE: Automatic NPENABLED: 0 PASSPHRASE: * PCUSOURCE: PID: * QUIET: False QUIETSIMPLE: True ROLE: AllFeatures_WithDefaults RSINSTALLMODE: FilesOnlyMode RSSVCACCOUNT: NT AUTHORITY\NETWORK SERVICE RSSVCPASSWORD: * RSSVCSTARTUPTYPE: Automatic SAPWD: * SECURITYMODE: SQL SQLBACKUPDIR: SQLCOLLATION: SQL_Latin1_General_CP1_CI_AS SQLSVCACCOUNT: NT Authority\System SQLSVCPASSWORD: * SQLSVCSTARTUPTYPE: Automatic SQLSYSADMINACCOUNTS: SQLTEMPDBDIR: SQLTEMPDBLOGDIR: SQLUSERDBDIR: SQLUSERDBLOGDIR: SQMREPORTING: False TCPENABLED: 1 UIMODE: AutoAdvance X86: False Configuration file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20100831_180236\ConfigurationFile.ini Detailed results: Feature: Database Engine Services Status: Failed: see logs for details MSI status: Passed Configuration status: Failed: see details below Configuration error code: 0x0A2FBD17@1211@1 Configuration error description: The process cannot access the file because it is being used by another process. Configuration log: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20100831_180236\Detail.txt Rules with failures: Global rules: Scenario specific rules: Rules report file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20100831_180236\SystemConfigurationCheck_Report.htm What should I do and why does this problem occur? Thanks , Shai.

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  • Windows server reboot loop - uninstalling hotfixes

    - by Jack
    After installing 3 updates, my system is stuck in a reboot loop. I am using server 2008 r2. I have tried deleting pending.xml from the windows directory, so pelase don't suggest that. I tried dism /image:d:\ /cleanup-image /revertpendingactions which completed successfully but did not solve my issue I then tried: dism /image:d:\ /Remove-Package /PackageName: and sucusfully removed one of the 3 updates. The two updates that are left are not listed with the dism get-packages command, but are listed with the get-apppatches command. I cannot find a way to uninstall them with dism however. So my question is, how can I manually uninstall specific updates or hotfixes from within the winre environment?

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  • How to Use USER_DEFINED Activity in OWB Process Flow

    - by Jinggen He
    Process Flow is a very important component of Oracle Warehouse Builder. With Process Flow, we can create and control the ETL process by setting all kinds of activities in a well-constructed flow. In Oracle Warehouse Builder 11gR2, there are 28 kinds of activities, which fall into three categories: Control activities, OWB specific activities and Utility activities. For more information about Process Flow activities, please refer to OWB online doc. Most of those activities are pre-defined for some specific use. For example, the Mapping activity allows execution an OWB mapping in Process Flow and the FTP activity allows an interaction between the local host and a remote FTP server. Besides those activities for specific purposes, the User Defined activity enables you to incorporate into a Process Flow an activity that is not defined within Warehouse Builder. So the User Defined activity brings flexibility and extensibility to Process Flow. In this article, we will take an amazing tour of using the User Defined activity. Let's start. Enable execution of User Defined activity Let's start this section from creating a very simple Process Flow, which contains a Start activity, a User Defined activity and an End Success activity. Leave all parameters of activity USER_DEFINED unchanged except that we enter /tmp/test.sh into the Value column of the COMMAND parameter. Then let's create the shell script test.sh in /tmp directory. Here is the content of /tmp/test.sh (this article is demonstrating a scenario in Linux system, and /tmp/test.sh is a Bash shell script): echo Hello World! > /tmp/test.txt Note: don't forget to grant the execution privilege on /tmp/test.sh to OS Oracle user. For simplicity, we just use the following command. chmod +x /tmp/test.sh OK, it's so simple that we’ve almost done it. Now deploy the Process Flow and run it. For a newly installed OWB, we will come across an error saying "RPE-02248: For security reasons, activity operator Shell has been disabled by the DBA". See below. That's because, by default, the User Defined activity is DISABLED. Configuration about this can be found in <ORACLE_HOME>/owb/bin/admin/Runtime.properties: property.RuntimePlatform.0.NativeExecution.Shell.security_constraint=DISABLED The property can be set to three different values: NATIVE_JAVA, SCHEDULER and DISBALED. Where NATIVE_JAVA uses the Java 'Runtime.exec' interface, SCHEDULER uses a DBMS Scheduler external job submitted by the Control Center repository owner which is executed by the default operating system user configured by the DBA. DISABLED prevents execution via these operators. We enable the execution of User Defined activity by setting: property.RuntimePlatform.0.NativeExecution.Shell.security_constraint= NATIVE_JAVA Restart the Control Center service for the change of setting to take effect. cd <ORACLE_HOME>/owb/rtp/sql sqlplus OWBSYS/<password of OWBSYS> @stop_service.sql sqlplus OWBSYS/<password of OWBSYS> @start_service.sql And then run the Process Flow again. We will see that the Process Flow completes successfully. The execution of /tmp/test.sh successfully generated a file /tmp/test.txt, containing the line Hello World!. Pass parameters to User Defined Activity The Process Flow created in the above section has a drawback: the User Defined activity doesn't accept any information from OWB nor does it give any meaningful results back to OWB. That's to say, it lacks interaction. Maybe, sometimes such a Process Flow can fulfill the business requirement. But for most of the time, we need to get the User Defined activity executed according to some information prior to that step. In this section, we will see how to pass parameters to the User Defined activity and pass them into the to-be-executed shell script. First, let's see how to pass parameters to the script. The User Defined activity has an input parameter named PARAMETER_LIST. This is a list of parameters that will be passed to the command. Parameters are separated from one another by a token. The token is taken as the first character on the PARAMETER_LIST string, and the string must also end in that token. Warehouse Builder recommends the '?' character, but any character can be used. For example, to pass 'abc,' 'def,' and 'ghi' you can use the following equivalent: ?abc?def?ghi? or !abc!def!ghi! or |abc|def|ghi| If the token character or '\' needs to be included as part of the parameter, then it must be preceded with '\'. For example '\\'. If '\' is the token character, then '/' becomes the escape character. Let's configure the PARAMETER_LIST parameter as below: And modify the shell script /tmp/test.sh as below: echo $1 is saying hello to $2! > /tmp/test.txt Re-deploy the Process Flow and run it. We will see that the generated /tmp/test.txt contains the following line: Bob is saying hello to Alice! In the example above, the parameters passed into the shell script are static. This case is not so useful because: instead of passing parameters, we can directly write the value of the parameters in the shell script. To make the case more meaningful, we can pass two dynamic parameters, that are obtained from the previous activity, to the shell script. Prepare the Process Flow as below: The Mapping activity MAPPING_1 has two output parameters: FROM_USER, TO_USER. The User Defined activity has two input parameters: FROM_USER, TO_USER. All the four parameters are of String type. Additionally, the Process Flow has two string variables: VARIABLE_FOR_FROM_USER, VARIABLE_FOR_TO_USER. Through VARIABLE_FOR_FROM_USER, the input parameter FROM_USER of USER_DEFINED gets value from output parameter FROM_USER of MAPPING_1. We achieve this by binding both parameters to VARIABLE_FOR_FROM_USER. See the two figures below. In the same way, through VARIABLE_FOR_TO_USER, the input parameter TO_USER of USER_DEFINED gets value from output parameter TO_USER of MAPPING_1. Also, we need to change the PARAMETER_LIST of the User Defined activity like below: Now, the shell script is getting input from the Mapping activity dynamically. Deploy the Process Flow and all of its necessary dependees then run the Process Flow. We see that the generated /tmp/test.txt contains the following line: USER B is saying hello to USER A! 'USER B' and 'USER A' are two outputs of the Mapping execution. Write the shell script within Oracle Warehouse Builder In the previous section, the shell script is located in the /tmp directory. But sometimes, when the shell script is small, or for the sake of maintaining consistency, you may want to keep the shell script inside Oracle Warehouse Builder. We can achieve this by configuring these three parameters of a User Defined activity properly: COMMAND: Set the path of interpreter, by which the shell script will be interpreted. PARAMETER_LIST: Set it blank. SCRIPT: Enter the shell script content. Note that in Linux the shell script content is passed into the interpreter as standard input at runtime. About how to actually pass parameters to the shell script, we can utilize variable substitutions. As in the following figure, ${FROM_USER} will be replaced by the value of the FROM_USER input parameter of the User Defined activity. So will the ${TO_USER} symbol. Besides the custom substitution variables, OWB also provide some system pre-defined substitution variables. You can refer to the online document for that. Deploy the Process Flow and run it. We see that the generated /tmp/test.txt contains the following line: USER B is saying hello to USER A! Leverage the return value of User Defined activity All of the previous sections are connecting the User Defined activity to END_SUCCESS with an unconditional transition. But what should we do if we want different subsequent activities for different shell script execution results? 1.  The simplest way is to add three simple-conditioned out-going transitions for the User Defined activity just like the figure below. In the figure, to simplify the scenario, we connect the User Defined activity to three End activities. Basically, if the shell script ends successfully, the whole Process Flow will end at END_SUCCESS, otherwise, the whole Process Flow will end at END_ERROR (in our case, ending at END_WARNING seldom happens). In the real world, we can add more complex and meaningful subsequent business logic. 2.  Or we can utilize complex conditions to work with different results of the User Defined activity. Previously, in our script, we only have this line: echo ${FROM_USER} is saying hello to ${TO_USER}! > /tmp/test.txt We can add more logic in it and return different values accordingly. echo ${FROM_USER} is saying hello to ${TO_USER}! > /tmp/test.txt if CONDITION_1 ; then ...... exit 0 fi if CONDITION_2 ; then ...... exit 2 fi if CONDITION_3 ; then ...... exit 3 fi After that we can leverage the result by checking RESULT_CODE in condition expression of those out-going transitions. Let's suppose that we have the Process Flow as the following graph (SUB_PROCESS_n stands for more different further processes): We can set complex condition for the transition from USER_DEFINED to SUB_PROCESS_1 like this: Other transitions can be set in the same way. Note that, in our shell script, we return 0, 2 and 3, but not 1. As in Linux system, if the shell script comes across a system error like IO error, the return value will be 1. We can explicitly handle such a return value. Summary Let's summarize what has been discussed in this article: How to create a Process Flow with a User Defined activity in it How to pass parameters from the prior activity to the User Defined activity and finally into the shell script How to write the shell script within Oracle Warehouse Builder How to do variable substitutions How to let the User Defined activity return different values and in what way can we leverage

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  • Ubuntu CPU Fan at 2200 RPM and CPU top at 90°C

    - by T-Erra
    I have a problem with my CPU heat. I'm running Ubuntu 14.04 (64bit) and I have issues with the cooling. I know it might be a hardware issue, but I've checked, the fan is running and in my GUI I use the command "sensors" which shows me a RPM of 2200 and a CPU temperature of 60°C while I'm not running any software. This seems to be really mysterious. However, if I start my IDE (Eclipse), Firefox and Chromium at the same time, the CPU temp goes up to 75-90° Celsius. I doubt that this is common for a system with 16 GB RAM, an i7 Processor and an Intel water cooling system and I also never had some issues like this before when I was running Ubuntu 12.04 or 13.04. Fan Speed At 60°C it's at 1300 RPM, and after start up Eclipse and Firefox it's at approximately 2200 RPM and between 75°C - 90°C depending on how many windows and IDE's I've opened. If I use the "top" command, there are just few processes like Xorg or Compiz which are taking up to 10% CPU usage at maximum, during the time I'm not running any software. I have tried to upgrade the Linux kernel, where I failed. After upgrading, I wasn't able to boot anymore so I tried to remove the new kernel from the boot directory and updated my grub file to an old entry, which works fine now, but still with the temperature issue. My NVIDIA drivers is also up to date, which dropped some issues I had before with the CPU load. So it can't be a problem with the graphic card. How can I find out, where the problem is, or why my CPU gets that high temperatures, which I only should get while playing games with high end graphics and so on? Did anyone have some similar issues before?

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  • Using VLC as RTSP server

    - by StackedCrooked
    I'm trying to figure out how to use the server capabilities of VLC. More specifically, how to export an SDP file when RTP streaming. In chapter 4 in the section related to RTP Streaming examples for server and client are given: vlc -vvv input_stream --sout '#rtp{dst=192.168.0.12,port=1234,sdp=rtsp://server.example.org:8080/test.sdp}' vlc rtsp://server.example.org:8080/test.sdp It's not very clear to me how to make it actually work. I have tried these two commands for server and client using two cmd instances: vlc -I rc screen:// --sout=#rtp{dst=127.0.0.1,port=4444,sdp=rtsp://localhost:8080/test.sdp} vlc -I rc rtsp://localhost:8080/test.sdp Invoking the second command causes the first one to crash. The second command shows the error message "could not connect to localhost:8080".

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  • Problem starting Glassfish on a VPS

    - by Raydon
    I am attempting to install Glassfishv3 on my Ubuntu (8.04) VPS using Java 1.6. I initially tried starting the server using: asadmin start-domain and received the following error message: JVM failed to start: com.sun.enterprise.admin.launcher.GFLauncherException: The server exited prematurely with exit code 1. Before it died, it produced the following output: Error occurred during initialization of VM Could not reserve enough space for object heap Command start-domain failed. I attempted to run it again and received a different message: Waiting for DAS to start Error starting domain: domain1. The server exited prematurely with exit code 1. Before it died, it produced the following output: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. Command start-domain failed. If I run cat /proc/meminfo I get the following (all other values are 0kB): MemTotal: 1310720 kB MemFree: 1150668 kB LowTotal: 1310720 kB LowFree: 1150668 kB I have checked the contents of glassfish/glassfish/domains/domain1/config/domain.xml and the JVM setting is: -Xmx512m Any help on resolving this problem would be appreciated.

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  • IIS 7.5 FTPS external access - 534 Policy requires SSL

    - by markmnl
    I have setup a FTP site that requires SSL but when I try connect to it externally I get the error: 220 Microsoft FTP Service 534 Policy requires SSL. I know - I set it so! Why doesnt it fetch the SSL cert from the site and allow me to logon?! (Incidentally beware of all the tutorials that Allow but do not Require SSL - while that will solve the problem it will be because SSL is not being used!). I suspect it may be I need a client that supports FTPS (FTP over SSL) and Windows explorer just uses IE which does not. But trying FileZilla and WinSCP I get a little further but then it hangs on TLS/SSL negotiation expecting a response from the server.... UPDATE: I have tried (from: http://learn.iis.net/page.aspx/309/configuring-ftp-firewall-settings/): Configure the Passive Port Range for the FTP Service. Configure the external IPv4 Address for a Specific FTP Site. Configure the firewall to allow the FTP service to listen on all ports that it opens. Disabling stateful FTP filtering so that Windows Firewall will not block FTP traffic. And still I get (in FileZilla trying both Active and Passive): Status: Connecting to 203.x.x.x:21... Status: Connection established, waiting for welcome message... Response: 220 Microsoft FTP Service Command: AUTH TLS Response: 234 AUTH command ok. Expecting TLS Negotiation. Status: Initializing TLS... Error: Connection timed out Error: Could not connect to server The Windows firewall logs unhelpfully have nothing to say.. UPDATE2: Turning the firewall off does not resolve the problem. I cannot believe how difficult it is to get something so simple to work and even once following the documentation it does not work. UPDATE3: Running FileZilla locally connecting through the loopback works in Active mode, in Passive mode I get up to: Command: LIST Response: 150 Opening BINARY mode data connection. Error: GnuTLS error -53: Error in the push function. Turning the firewall off at both ends I can still not connect the client and get the same error as above.

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  • 550 “Overwrite permission denied” when editing a file via FTP

    - by nodebunny
    DreamHost recently moved my accounts to a new shared box, and now I can't edit files via UltraEdit's built in FTP client, which messes up my work flow! What did they do that this is not working now? It stopped working after they moved me. Here's the output from the FTP console in UltraEdit 10/26/2011 10:42:36 AM: 220 DreamHost FTP Server 10/26/2011 10:42:36 AM: USER nodebunny 10/26/2011 10:42:36 AM: 331 Password required for ninjawww 10/26/2011 10:42:36 AM: PASS xxxxxxxx 10/26/2011 10:42:36 AM: 230 User nodebunny logged in 10/26/2011 10:42:36 AM: FEAT 10/26/2011 10:42:36 AM: 211-Features: LANG ja-JP.UTF-8;ja-JP;zh-TW;fr-FR;zh-CN;en-US*;bg-BG;ko-KR.UTF-8;ko-KR MDTM MFMT TVFS UTF8 MFF modify;UNIX.group;UNIX.mode; MLST modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.mode*;UNIX.owner*; REST STREAM SIZE 211 End 10/26/2011 10:42:36 AM: OPTS UTF8 ON 10/26/2011 10:42:36 AM: 200 UTF8 set to on 10/26/2011 10:42:36 AM: PWD 10/26/2011 10:42:36 AM: 257 "/" is the current directory 10/26/2011 10:42:36 AM: PWD 10/26/2011 10:42:36 AM: 257 "/" is the current directory 10/26/2011 10:42:36 AM: CWD /dev/proj/nodebunny 10/26/2011 10:42:36 AM: 250 CWD command successful 10/26/2011 10:42:36 AM: PWD 10/26/2011 10:42:36 AM: 257 "/dev/proj/nodebunny/lib/Buffer" is the current directory 10/26/2011 10:42:36 AM: PWD 10/26/2011 10:42:37 AM: 257 "/dev/proj/nodebunny/lib/Buffer" is the current directory 10/26/2011 10:42:37 AM: TYPE I 10/26/2011 10:42:37 AM: 200 Type set to I 10/26/2011 10:42:37 AM: PORT 10,15,55,125,226,16 10/26/2011 10:42:37 AM: 200 PORT command successful 10/26/2011 10:42:37 AM: STOR Buffer.pm 10/26/2011 10:42:37 AM: 550 Buffer.pm: Overwrite permission denied

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  • error when start Subversion Server in UberSVN

    - by dakiquang
    I'm using uberSVN on Ubuntu server. Now, I can't checkout, commit source from Subversion Server ( domain.com:9880, port subversion) I tried to start httpd by command line as: sudo /opt/ubersvn/bin/httpdserverctl start , but I get error: httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName httpd (pid 895) already running I tried run this command as follow: cd /opt/ubersvn/bin sudo ./ubersvncontrol start then get errors: Starting SysV Tomcat Using CATALINA_BASE: /opt/ubersvn/tomcat Using CATALINA_HOME: /opt/ubersvn/tomcat Using CATALINA_TMPDIR: /opt/ubersvn/tomcat/temp Using JRE_HOME: /opt/ubersvn/jre Using CLASSPATH: /opt/ubersvn/tomcat/bin/bootstrap.jar Using CATALINA_PID: /opt/ubersvn/data/run/tomcat.pid Existing PID file found during start. Tomcat appears to still be running with PID 943. Start aborted. In the Ubersvn website GUI, I tried start Ubersvn server but get error : How to start Subversion Server ?

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  • .NET Framework 4.5 remote install via PowerShell

    - by user251297
    I am trying to install .NET Framework 4.5 to the remote Win2008R2 Server via PowerShell session in such way (user is in the server Administrators group): $session = New-PSSession -ComputerName $server -Credential Get-Credential Invoke-Command -Session $session -ScriptBlock {Start-Process -FilePath "C:\temp\dotnetfx45_full_x86_x64.exe" -ArgumentList "/q /norestart" -Wait -PassThru} And then I get this error: Executable: C:\temp\dotnetfx45_full_x86_x64.exe v4.5.50709.17929 --- logging level: standard --- Successfully bound to the ClusApi.dll Error 0x80070424: Failed to open the current cluster Cluster drive map: '' Considering drive: 'C:\'... Drive 'C:\' has been selected as the largest fixed drive Directory 'C:\aa113be049433424d2d3ca\' has been selected for file extraction Extracting files to: C:\aa113be049433424d2d3ca\ Error 0x80004005: Failed to extract all files out of box container #0. Error 0x80004005: Failed to extract Exiting with result code: 0x80004005 === Logging stopped: 2013/09/04 16:29:51 === If I run command locally at the server - all works fine. Start-Process -FilePath "C:\temp\dotnetfx45_full_x86_x64.exe" ` -ArgumentList "/q /norestart" -Wait

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  • Windows Server 2008 CMD Task Schedule not running

    - by Jonathan Platovsky
    I have a BAT/CMD file that when run from the command prompt runs completely. When I run it through the Task Scheduler it partially runs. Here is a copy of the file cd\sqlbackup ren Apps_Backup*.* Apps.Bak ren Apps_Was_Backup*.* Apps_Was.Bak xcopy /Y c:\sqlbackup\*.bak c:\sqlbackup\11\*.bak xcopy /y c:\sqlbackup\*.bak \\igweb01\c$\sqlbackup\*.bak Move /y c:\sqlbackup\*.bak "\\igsrv01\d$\sql backup\" The last two lines do not run when the task scheduler calls it. But again, work when manually run from the command line. All the local sever commands run but when it comes to the last two lines where it goes to another server then it does not work.

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  • Unable to remove file using 'rm'

    - by Alvin Sim
    Hi all, In one of our severs (IBM AIX), we have a file in path /data/1002/ which we were not able to remove or delete using the 'rm' command. The error message we got is "rm: A1208001.002: A file or directory in the path name does not exist." With the "-f" option, no error message was displayed, but the file is still there. This file has a '0' byte size and when i use the command "touch A120001.002", i see two files with the same file name in that directory. The directory listing is as below: $ ls -l total 56 -rwxrwxrwx 1 oracle dba 0 Feb 09 11:57 S1208001.002 drwxrwxrwx 4 nobody dba 24576 Feb 09 13:36 backup How do I remove this bogus fie? Thanks.

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  • On the lighter side : 'sudo apt-get moo' or a treatise on Ubuntu Cows !

    - by Arkapravo
    While dabbling about Ubuntu 9.10 ! I came across this command ! ..... sudo get-apt moo acer@acer:~$ sudo apt-get moo (__) (oo) /------\/ / | || * /\---/\ ~~ ~~ ...."Have you mooed today?"... Which most surprisingly 'made a MOO' ! .....Does anyone know any more such funnier outcomes of command line etc ? This is an easter egg in ubuntu ! .... and nearly every flavour of Linux has some !... how unfortunate for the cows !

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  • cron doesn't execute it's commands

    - by Silvio Keller
    I created an own small server with Debian. Last night i updated it. It created an error while generating the initrd and it didn't boot. Today i booted from another filesystem and did dpkg --configure -a with chroot. I also checked the filesystem. Now everything should be ok. But cron doesn't work:-( It is the same /etc/crontab-File but it doesn't work. I reinstalled cron and tried many things. Is there a way to see cron's log? I only readed about rsyslog, but i have not installed rsyslog, because the server is based on a minimal system (Freeagent Dockstar). Has someone an idea? Best regards Silvio Keller Update There is no file /var/log/syslog and dpkg -l|grep syslog gives me no output, so i think syslog is not installed. It is only a minimal system. cron -l gives: cron: can't lock /var/run/crond.pid, otherpid may be 687: Resource temporarily unavailable So i stopped cron with /etc/init.d/cron stop and executed cron -l again, this gives no output. At this moment i tried to start cron with /etc/init.d/cron start: Starting periodic command scheduler: cron failed! But there's no additional error info... But i see there's now in the background a proccess called cron -l which runs. If i stop it /etc/init.d/cron start works: Starting periodic command scheduler: cron. I used the crontab-file /etc/crontab, this worked for me always. Till i updated my kernel and the initrd it doesn't. The file's content is: SHELL=/bin/sh PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin # m h dom mon dow user command 17 * * * * root cd / && run-parts --report /etc/cron.hourly 25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily ) 47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly ) 52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly ) 00 5 * * * root dummy 23 45 * * 7 root dummy 00 * * * * root dummy */1 * * * * root dummy 00 1 * * * root dummy 00 4 * * * root dummy */5 * * * * root dummy #00 */10 * * * root dummy 01 0 * * * root dummy 00 5 * * * root dummy 00 4 * * * root dummy # If i start crontab -e it creates a new file /tmp/crontab.vn87tv/crontab, which is unfortunaly on a tmpfs and which also doesn't work. Thanks & Best regards

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  • Install Domain Controller – Part1 of build my own development SharePoint2010 Farm

    - by ybbest
    As the memory become really cheap now, a couple days ago I have updated my laptop memory to 12g. Plus I got my old desktop ,now I decide to build my own SharePoint farm at home. I decide to document the steps to build a simple SharePoint farm. I will use windows server 2008 r2 and VMware. In the first part of this series of building my own SharePoint farm. I will create my domain controller. Here are the steps to install it: Open the command line by going to run and type CMD and then type dcpromo in the command line. The AD Installation wizard will prompt and click next. 2. Click next as shown in the screenshot.   3. Select creates a new domain in a new forest and click next.      4. Type a domain name (e.g. ybbest.com) and click next. 5.In my case , I select Windows Server 2008 R2 forest Functional level and click next 6. Leave the default and click next.(If you have not make a static IP address , you need to do so now)      7.You might get scary prompt like the screenshot below , just ignore the message and click Yes.     8.Leave the default settings and click Next  9.Type a password when you need to restore your Domain        10.Click Next and restart your computer ,this will install your Domain Controller.

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  • "powershell has stopped working" on PS exit after creating IIS User

    - by Nick Jones
    On a Windows Server 2012 box, I'm using PS to create a new IIS User (for automated deployments using MSDeploy). The command itself appears to work fine -- the user is created -- but as soon as I exit my PowerShell session (typing exit or just closing the command window), a dialog is displayed stating "powershell has stopped working", with the following details: Problem signature: Problem Event Name: PowerShell NameOfExe: powershell.exe FileVersionOfSystemManagementAutomation: 6.2.9200.16628 InnermostExceptionType: Runtime.InteropServices.InvalidComObject OutermostExceptionType: Runtime.InteropServices.InvalidComObject DeepestPowerShellFrame: unknown DeepestFrame: System.StubHelpers.StubHelpers.GetCOMIPFromRCW ThreadName: unknown OS Version: 6.2.9200.2.0.0.400.8 Locale ID: 1033 The PS commands in question are: [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.Web.Management") [Microsoft.Web.Management.Server.ManagementAuthentication]::CreateUser("Foo", "Bar") Why is this happening and how can I avoid it? EDIT: I've also confirmed this be a problem with PowerShell 4.0, so I've added that tag. I've also submitted it on Connect. UPDATE: It appears that Windows Server 2012 R2 does not have this same bug.

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