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  • SQL Server 2005 standard filegroups / files for performance on SAN

    - by Blootac
    I submitted this to stack overflow (here) but realised it should really be on serverfault. so apologies for the incorrect and duplicate posting: Ok so I've just been on a SQL Server course and we discussed the usage scenarios of multiple filegroups and files when in use over local RAID and local disks but we didn't touch SAN scenarios so my question is as follows; I currently have a 250 gig database running on SQL Server 2005 where some tables have a huge number of writes and others are fairly static. The database and all objects reside in a single file group with a single data file. The log file is also on the same volume. My interpretation is that separate data files should be used across different disks to lessen disk contention and that file groups should be used for partitioning of data. However, with a SAN you obviously don't really have the same issue of disk contention that you do with a small RAID setup (or at least we don't at the moment), and standard edition doesn't support partitioning. So in order to improve parallelism what should I do? My understanding of various Microsoft publications is that if I increase the number of data files, separate threads can act across each file separately. Which leads me to the question how many files should I have. One per core? Should I be putting tables and indexes with high levels of activity in separate file groups, each with the same number of data files as we have cores? Thank you

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  • zfs rename/move root filesystem into child

    - by Anton
    Similar question exists but the solution (using mv) is awful because in this case it works as "copy, then remove" rather than pure "move". So, I created a pool: zpool create tank /dev/loop0 and rsynced my data from another storage in there directly so that my data is now in /tank. zfs list NAME USED AVAIL REFER MOUNTPOINT tank 591G 2.10T 591G /tank Now I've realized that I need my data to be in a child filesystem, not in /tank filesystem directly. So how do I move or rename the existing root filesystem so that it becomes a child within the pool? Simple rename won't work: zfs rename tank tank/mydata cannot rename to 'tank/mydata': datasets must be within same pool (Btw, why does it complain the datasets are not within same pool when if fact I only have one pool?) I know there are solutions that involve copying all the data (mv, or sending the whole dataset to another device and back), but shouldn't there be a simple elegant way? Just noting that I do not care of snapshots at this stage (there are none yet to care of).

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  • MySQL 5.6 won't start on OS X - ambiguous option

    - by MaticPetek
    I would like to try MySQL 5.6 on my machine, but I cannot start it. I always get an error : [ERROR] /usr/local/mysql-5.6.5-m8-osx10.6-x86/bin/mysqld: ambiguous option '--log=/var/log/mysqld.log' (log-bin, log_slave_updates) my.cnf: [mysqld]<br/> pid-file=/usr/local/mysql-5.6.5-m8-osx10.6-x86/mysql.pid<br/> log-error=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-error.log<br/> log-slow-queries=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-slowquery.log<br/> log-bin=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-bin.log<br/> general_log_file=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-general_log_file.log<br/> log=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql.log<br/> I try to set "log" and "log-bin" paramether in my.cnf file and also as start parameters for mysqld, but with no luck. Any idea what I can do? Thank you. My environment: OS X 10.6.8 mysql-5.6.5-m8-osx10.6-x86 (not _x64 version) Note: I'm also running Mysql 5.5 on this machine (different port and socket). I also try to stop this instance but I get the some error.

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  • GlusterFS on VMWare ESXi 5

    - by Dharmavir
    I want to build network file system on top of my VMWare ESXi based virtual nodes which are running Ubuntu 12.04 LTS. I am evalaluating options and found that GlusterFS (http://www.gluster.org/) can turn out to be a good choice. Purpose: I have about 2 dozen VM nodes with different configurations, on 2 physical nodes which has following configuration: 16 core Intel Xeon 1 TB 48 GB RAM Now as I said earlier each Physical server has about 1TB hdd and I can increase if I want additional so for now I have 2TB disk space available, these space is distributed in VM nodes I have created on which about 2 dozen VM nodes live. Now some of them being application server and mgmt server, they have plenty of free disk space which I want to utilize for some heavy storage which I can not design if I do that individually on single VM node. This way if my storage is distributed between dozens of VM nodes and about 2 or more physical nodes I have some sort of backup as well. I do not mind if data gets stored redundently but per my knowledge it might hapeen that individual VM nodes will not be able to store all of the data because complete data size for example if we take 100GB will exceed VM disk size of 70GB and then VM will also have system and program files on it. I need some suggestion that will GlusterFS be the solution for which I am looking forward to or I should go with something like hadoop? I am not too sure. But yes, I would like to utilize my free space on each VM node and while doing that if I get store data redundently I am okay because it will give me data security.

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  • Wordpress Directory Permission to allow uploads, plugin folders, etc

    - by user1015958
    I have a wordpress pre-made site which were developed on my localmachine, and i uploaded it too a vps running on debian6, using nginx, mysql, php. Following this guide: 1) Create an unprivilaged user, this could be say 'karl' or whatever, and make them belong to the www-data group. So that if I were to login as karl and create a web root in say /home/karl/www/ , all the files will be owned by karl:www-data 2) Set up nginx as the user www-data in nginx.conf 3) Set up PHP-FPM to run as www-data 4) Place your files in /home/karl/www/[domain name maybe]/public_html/, upload as 'karl' so you don't have to chown everything again. when i type ls -l inside public_html/ it shows that all the files inside are owned by karl:karl. But the public_html directory is owned by karl:www-data. I chmod 0755 the folder wp-content but i still get the error: ERROR: Path ../wp-content/connection_images does not seem to be writeable. I know i shouldn't set it too 777 due to security reason, how should i set it too proper permission? and what should i set also to allow my users to upload,write posts,edit articles? Sorry for my english by the way.

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  • Windows Task Scheduler fails on EventData instruction

    - by Pete
    The Scheduled Task fails on the Event Data instruction in this XML: <ValueQueries> <Value name="eventChannel">Event/System/Channel</Value> <Value name="eventRecordID">Event/System/EventRecordID</Value> <Value name="eventData">Event/EventData/Data</Value> </ValueQueries> The other 2 fields can be passed as arguments and the EventData syntax matches other websites, so I don't know why it's failing. This is the Event Viewer XML: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Aptify.ExceptionManagerPublishedException" /> <EventID Qualifiers="0">0</EventID> <Level>2</Level> <Task>0</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2013-11-07T19:39:14.000000000Z" /> <EventRecordID>97555</EventRecordID> <Channel>Application</Channel> <Computer>[Computer Name]</Computer> <Security /> </System> <EventData> <Data>General Information ********************************************* Additional Info: ExceptionManager.MachineName: [Computer Name] ExceptionManager.TimeStamp: 11/7/2013 12:39:14 PM ExceptionManager.FullName: AptifyExceptionManagement, Version=4.0.0.0, Culture=neutral, PublicKeyToken=[key] ExceptionManager.AppDomainName: Aptify Shell.exe ExceptionManager.ThreadIdentity: ExceptionManager.WindowsIdentity: ACA_DOMAIN\pbassett 1) Exception Information ********************************************* Exception Type: Aptify.Framework.BusinessLogic.GenericEntity.AptifyGenericEntityValidationException Entity: Tasks ErrorString: Task Type "Make Contact" is not active. MachineName: [machine] CreatedDateTime: 11/7/2013 12:39:14 PM AppDomainName: Aptify Shell.exe ThreadIdentityName: WindowsIdentityName: [identity] Severity: 0 ErrorNumber: 0 Message: Task Type "Make Contact" is not active. Data: System.Collections.ListDictionaryInternal TargetSite: Boolean Save(Boolean, System.String ByRef, Sys tem.String) HelpLink: NULL Source: AptifyGenericEntity StackTrace Information ********************************************* at Aptify.Framework.BusinessLogic.GenericEntity.AptifyGenericEntity.Save(Boolean AllowGUI, String& ErrorString, String TransactionID)</Data> </EventData> </Event>

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  • Excel 2013: Is it possible to collapse rows only in a specific column?

    - by h7u9i
    In my spreadsheet, I'm trying to figure out a way to collapse rows in a specific column. Right now, if I do Data - Group - Group... - Rows, it'll collapse the entire row. I want to collapse rows only in a specific column. Example: |---------|----------| | hi | + data | |---------|----------| | hello | + data2 | |---------|----------| | | | |---------|----------| | | | And opening data 1 would turn into: |---------|----------| | hi | - data1 | |---------|----------| | hello | point1 | |---------|----------| | | point2 | |---------|----------| | | + data2 | |---------|----------| | | | |---------|----------| | | | Is this possible to do in Excel?

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  • Formatted mac external hard drive loaded on pc

    - by kjokay
    I have an issue where it appears that an external hard drive which had been formatted on a mac system was loaded as a drive in Windows. Windows is obviously unable to read the data and now the drive won't mount in the mac. It appears that Windows overwrote something concerning the drive's information on what filesystems and types it has on it. Mac diskutility is unable to repair the drive and the partition is showing up in the utility as a FAT32. Using an applexsoft utility, I am able to verify the data is still on this drive, but I'd rather not spend $100 to save these files (its not my hard drive anyways). Is there a way I can use some UNIX commands to find out the partition information on the drive, back the raw data up on it, then restore the data back onto the drive after re-formatting it again?

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  • The Koyal Group Info Mag News¦Charged building material could make the renewable grid a reality

    - by Chyler Tilton
    What if your cell phone didn’t come with a battery? Imagine, instead, if the material from which your phone was built was a battery. The promise of strong load-bearing materials that can also work as batteries represents something of a holy grail for engineers. And in a letter published online in Nano Letters last week, a team of researchers from Vanderbilt University describes what it says is a breakthrough in turning that dream into an electrocharged reality. The researchers etched nanopores into silicon layers, which were infused with a polyethylene oxide-ionic liquid composite and coated with an atomically thin layer of carbon. In doing so, they created small but strong supercapacitor battery systems, which stored electricity in a solid electrolyte, instead of using corrosive chemical liquids found in traditional batteries. These supercapacitors could store and release about 98 percent of the energy that was used to charge them, and they held onto their charges even as they were squashed and stretched at pressures up to 44 pounds per square inch. Small pieces of them were even strong enough to hang a laptop from—a big, fat Dell, no less. Although the supercapacitors resemble small charcoal wafers, they could theoretically be molded into just about any shape, including a cell phone’s casing or the chassis of a sedan. They could also be charged—and evacuated of their charge—in less time than is the case for traditional batteries. “We’ve demonstrated, for the first time, the simple proof-of-concept that this can be done,” says Cary Pint, an assistant professor in the university’s mechanical engineering department and one of the authors of the new paper. “Now we can extend this to all kinds of different materials systems to make practical composites with materials specifically tailored to a host of different types of applications. We see this as being just the tip of a very massive iceberg.” Pint says potential applications for such materials would go well beyond “neat tech gadgets,” eventually becoming a “transformational technology” in everything from rocket ships to sedans to home building materials. “These types of systems could range in size from electric powered aircraft all the way down to little tiny flying robots, where adding an extra on-board battery inhibits the potential capability of the system,” Pint says. And they could help the world shift to the intermittencies of renewable energy power grids, where powerful batteries are needed to help keep the lights on when the sun is down or when the wind is not blowing. “Using the materials that make up a home as the native platform for energy storage to complement intermittent resources could also open the door to improve the prospects for solar energy on the U.S. grid,” Pint says. “I personally believe that these types of multifunctional materials are critical to a sustainable electric grid system that integrates solar energy as a key power source.”

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  • RAID 5 configuration and future expansion

    - by Alexis Hirst
    hi, I am building a PC to act as a file server among other things, and I was wondering whether it is a good idea to create 2 partitions on the RAID 5 array, one for OS one for data, or to have a separate disk for OS and use array for data. Also, one day i may want to add another disk to the array, so would there be any issues if I had the OS partition on the RAID5 array when it came to resizing the data partition?

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  • Excel file growing huge (>150 MB)

    - by Josh
    There is one particular Excel file that is used by a number of employees at my company. It is edited from both Excel 2003 and 2007, with the "Sharing" feature turned on to allow multiple writers at once. The file has a decent amount of data on several sheets with some basic formatting, and used to be about 6MB, which seems reasonable for its content. But after a few weeks of editing, the file grew to 10, then 20 MB, and eventually skyrocketed to more than 150 MB, even though it still has about the same amount of data as before. It now takes 5-10 minutes to open it, and that much time again to save it. The first time this happened, I copied the content of each sheet into a new, blank workbook, and saved the new workbook; this brought it back down to about 6MB. Now, it has blown up again. The workbook uses the "Data Validation" feature to limit the values in certain columns to the contents of a few named ranges. Copying all the data into a new workbook means re-setting up all the data validation, which is a pain and not something that we want to do every month. As a troubleshooting step, I tried saving the file in "XML Spreadsheet 2003" format, hoping to get some insight into what was being stored. Sure enough, the file was almost a gig, and almost all of the 10 million lines look like this: <NamedCell ss:Name="Z_21D5114F_E50C_46AC_AA4F_C3FF540C717F_.wvu.FilterData"/> <NamedCell ss:Name="Z_1EE2BA5E_3011_4F9A_8ACD_E58835250FC4_.wvu.FilterData"/> <NamedCell ss:Name="Z_1E3BDCEA_6A72_4ECC_BF4F_7B03CC66181E_.wvu.FilterData"/> I've seen a few VBScripts online to manage and enumerate named cells that are hidden in Excel's built-in interface, though I wonder how they'd handle my 10 million named cells. What I really need, though, is an understanding of why this keeps happening. What actions in excel could be causing this?

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  • Apache and file permissions

    - by Matthew
    I'm running LAMP on Ubuntu 8.04. Apache's username and group are www-data. I put my connection details and AES key in a file in a directory that's not web served. I chown-ed the files to www-data:www-data and set the permissions to 700. Still, the script that require()s these files will only run if I chmod the files to 755. What am I missing?

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  • dev_install failed on ARM chromebook

    - by user1027721
    I'm trying this guide for having access to emerge on chromeos. http://www.chromium.org/chromium-os/how-tos-and-troubleshooting/install-software-on-base-images Unfortunately I always got the same error which is $ sudo dev_install Starting installation of developer packages. First, we download the necessary files. Downloading https://commondatastorage.googleapis.com/chromeos-dev-installer/board/daisy/full-3.168.0.0/packages/app-misc/mime-types-8.tbz2 % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 127 100 127 0 0 252 0 --:--:-- --:--:-- --:--:-- 305 [: 184: -ne: unexpected operator Extracting /usr/local/portage/packages/app-misc/mime-types-8.tbz2 I think that it somehow returns a 404 everytime. Thanks for your help

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  • Upgrading Redmine, activerecord-mysql2-adapter not recognized

    - by David Kaczynski
    For upgrading Redmine from 1.0.1 to 2.1.2, I need to execute the command: rake db:migrate RAILS_ENV=production However, doing so produces the following error: rake aborted! Please install the mysql2 adapter: gem install activerecord-mysql2-adapter (mysql2 is not part of the bundle. Add it to Gemfile.) I have ran gem install activerecord-mysql2-adapter, but I still get the same error when I try to run the rake ... command. How do I get my RoR app to recognize that I have the mysql2 adapter installed already? or Is there something wrong with my activerecord-mysql2-adapter installation? Results of sudo bundle install: Using rake (10.0.0) Using i18n (0.6.1) Using multi_json (1.3.7) Using activesupport (3.2.8) Using builder (3.0.0) Using activemodel (3.2.8) Using erubis (2.7.0) Using journey (1.0.4) Using rack (1.4.1) Using rack-cache (1.2) Using rack-test (0.6.2) Using hike (1.2.1) Using tilt (1.3.3) Using sprockets (2.1.3) Using actionpack (3.2.8) Using mime-types (1.19) Using polyglot (0.3.3) Using treetop (1.4.12) Using mail (2.4.4) Using actionmailer (3.2.8) Using arel (3.0.2) Using tzinfo (0.3.35) Using activerecord (3.2.8) Using activeresource (3.2.8) Using coderay (1.0.8) Using fastercsv (1.5.5) Using rack-ssl (1.3.2) Using json (1.7.5) Using rdoc (3.12) Using thor (0.16.0) Using railties (3.2.8) Using jquery-rails (2.0.3) Using metaclass (0.0.1) Using mocha (0.12.3) Using mysql (2.8.1) Using net-ldap (0.3.1) Using pg (0.14.1) Using ruby-openid (2.1.8) Using rack-openid (1.3.1) Using bundler (1.2.1) Using rails (3.2.8) Using rmagick (2.13.1) Using shoulda (2.11.3) Using sqlite3 (1.3.6) Using yard (0.8.3) [32mYour bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.[0m Results of sudo find / -name "*mysql2*": /var/lib/gems/1.8/doc/mysql2-0.3.11 /var/lib/gems/1.8/doc/activerecord-3.2.9/ri/ActiveRecord/Base/mysql2_connection-c.ri /var/lib/gems/1.8/doc/activerecord-mysql2-adapter-0.0.3 /var/lib/gems/1.8/doc/activerecord-mysql2-adapter-0.0.3/ri/ActiveRecord/Base/em_mysql2_connection-c.ri /var/lib/gems/1.8/doc/activerecord-mysql2-adapter-0.0.3/ri/ActiveRecord/Base/mysql2_connection-c.ri /var/lib/gems/1.8/gems/mysql2-0.3.11 /var/lib/gems/1.8/gems/mysql2-0.3.11/spec/mysql2 /var/lib/gems/1.8/gems/mysql2-0.3.11/mysql2.gemspec /var/lib/gems/1.8/gems/mysql2-0.3.11/lib/mysql2.rb /var/lib/gems/1.8/gems/mysql2-0.3.11/lib/mysql2 /var/lib/gems/1.8/gems/mysql2-0.3.11/lib/mysql2/mysql2.so /var/lib/gems/1.8/gems/mysql2-0.3.11/ext/mysql2 /var/lib/gems/1.8/gems/mysql2-0.3.11/ext/mysql2/mysql2.so /var/lib/gems/1.8/gems/mysql2-0.3.11/ext/mysql2/mysql2_ext.c /var/lib/gems/1.8/gems/mysql2-0.3.11/ext/mysql2/mysql2_ext.h /var/lib/gems/1.8/gems/mysql2-0.3.11/ext/mysql2/mysql2_ext.o /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/connection_adapters/mysql2_adapter.rb /var/lib/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3 /var/lib/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/activerecord-mysql2-adapter.gemspec /var/lib/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/lib/arel/engines/sql/compilers/mysql2_compiler.rb /var/lib/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/lib/activerecord-mysql2-adapter.rb /var/lib/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/lib/activerecord-mysql2-adapter /var/lib/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/lib/active_record/connection_adapters/em_mysql2_adapter.rb /var/lib/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/lib/active_record/connection_adapters/mysql2_adapter.rb /var/lib/gems/1.8/gems/activerecord-3.2.8/lib/active_record/connection_adapters/mysql2_adapter.rb /var/lib/gems/1.8/cache/mysql2-0.3.11.gem /var/lib/gems/1.8/cache/activerecord-mysql2-adapter-0.0.3.gem /var/lib/gems/1.8/specifications/activerecord-mysql2-adapter-0.0.3.gemspec /var/lib/gems/1.8/specifications/mysql2-0.3.11.gemspec Contents of /usr/share/redmine/Gemfile: source 'http://rubygems.org' gem 'rails', '3.2.8' gem "jquery-rails", "~> 2.0.2" gem "i18n", "~> 0.6.0" gem "coderay", "~> 1.0.6" gem "fastercsv", "~> 1.5.0", :platforms => [:mri_18, :mingw_18, :jruby] gem "builder", "3.0.0" # Optional gem for LDAP authentication group :ldap do gem "net-ldap", "~> 0.3.1" end # Optional gem for OpenID authentication group :openid do gem "ruby-openid", "~> 2.1.4", :require => "openid" gem "rack-openid" end # Optional gem for exporting the gantt to a PNG file, not supported with jruby platforms :mri, :mingw do group :rmagick do # RMagick 2 supports ruby 1.9 # RMagick 1 would be fine for ruby 1.8 but Bundler does not support # different requirements for the same gem on different platforms gem "rmagick", ">= 2.0.0" end end # Database gems platforms :mri, :mingw do group :postgresql do gem "pg", ">= 0.11.0" end group :sqlite do gem "sqlite3" end end platforms :mri_18, :mingw_18 do group :mysql do gem "mysql" end end platforms :mri_19, :mingw_19 do group :mysql do gem "mysql2", "~> 0.3.11" end end platforms :jruby do gem "jruby-openssl" group :mysql do gem "activerecord-jdbcmysql-adapter" end group :postgresql do gem "activerecord-jdbcpostgresql-adapter" end group :sqlite do gem "activerecord-jdbcsqlite3-adapter" end end group :development do gem "rdoc", ">= 2.4.2" gem "yard" end group :test do gem "shoulda", "~> 2.11" # Shoulda does not work nice on Ruby 1.9.3 and seems to need test-unit explicitely. gem "test-unit", :platforms => [:mri_19] gem "mocha", "0.12.3" end local_gemfile = File.join(File.dirname(__FILE__), "Gemfile.local") if File.exists?(local_gemfile) puts "Loading Gemfile.local ..." if $DEBUG # `ruby -d` or `bundle -v` instance_eval File.read(local_gemfile) end # Load plugins' Gemfiles Dir.glob File.expand_path("../plugins/*/Gemfile", __FILE__) do |file| puts "Loading #{file} ..." if $DEBUG # `ruby -d` or `bundle -v` instance_eval File.read(file) end Contents of /usr/share/redmine/Gemfile.lock: GEM remote: http://rubygems.org/ specs: actionmailer (3.2.8) actionpack (= 3.2.8) mail (~> 2.4.4) actionpack (3.2.8) activemodel (= 3.2.8) activesupport (= 3.2.8) builder (~> 3.0.0) erubis (~> 2.7.0) journey (~> 1.0.4) rack (~> 1.4.0) rack-cache (~> 1.2) rack-test (~> 0.6.1) sprockets (~> 2.1.3) activemodel (3.2.8) activesupport (= 3.2.8) builder (~> 3.0.0) activerecord (3.2.8) activemodel (= 3.2.8) activesupport (= 3.2.8) arel (~> 3.0.2) tzinfo (~> 0.3.29) activeresource (3.2.8) activemodel (= 3.2.8) activesupport (= 3.2.8) activesupport (3.2.8) i18n (~> 0.6) multi_json (~> 1.0) arel (3.0.2) builder (3.0.0) coderay (1.0.8) erubis (2.7.0) fastercsv (1.5.5) hike (1.2.1) i18n (0.6.1) journey (1.0.4) jquery-rails (2.0.3) railties (>= 3.1.0, < 5.0) thor (~> 0.14) json (1.7.5) mail (2.4.4) i18n (>= 0.4.0) mime-types (~> 1.16) treetop (~> 1.4.8) metaclass (0.0.1) mime-types (1.19) mocha (0.12.3) metaclass (~> 0.0.1) multi_json (1.3.7) mysql (2.8.1) mysql2 (0.3.11) net-ldap (0.3.1) pg (0.14.1) polyglot (0.3.3) rack (1.4.1) rack-cache (1.2) rack (>= 0.4) rack-openid (1.3.1) rack (>= 1.1.0) ruby-openid (>= 2.1.8) rack-ssl (1.3.2) rack rack-test (0.6.2) rack (>= 1.0) rails (3.2.8) actionmailer (= 3.2.8) actionpack (= 3.2.8) activerecord (= 3.2.8) activeresource (= 3.2.8) activesupport (= 3.2.8) bundler (~> 1.0) railties (= 3.2.8) railties (3.2.8) actionpack (= 3.2.8) activesupport (= 3.2.8) rack-ssl (~> 1.3.2) rake (>= 0.8.7) rdoc (~> 3.4) thor (>= 0.14.6, < 2.0) rake (10.0.0) rdoc (3.12) json (~> 1.4) rmagick (2.13.1) ruby-openid (2.1.8) shoulda (2.11.3) sprockets (2.1.3) hike (~> 1.2) rack (~> 1.0) tilt (~> 1.1, != 1.3.0) sqlite3 (1.3.6) test-unit (2.5.2) thor (0.16.0) tilt (1.3.3) treetop (1.4.12) polyglot polyglot (>= 0.3.1) tzinfo (0.3.35) yard (0.8.3) PLATFORMS ruby DEPENDENCIES activerecord-jdbcmysql-adapter activerecord-jdbcpostgresql-adapter activerecord-jdbcsqlite3-adapter builder (= 3.0.0) coderay (~> 1.0.6) fastercsv (~> 1.5.0) i18n (~> 0.6.0) jquery-rails (~> 2.0.2) jruby-openssl mocha (= 0.12.3) mysql mysql2 (~> 0.3.11) net-ldap (~> 0.3.1) pg (>= 0.11.0) rack-openid rails (= 3.2.8) rdoc (>= 2.4.2) rmagick (>= 2.0.0) ruby-openid (~> 2.1.4) shoulda (~> 2.11) sqlite3 test-unit yard Results of gem list: actionmailer (3.2.9, 3.2.8) actionpack (3.2.9, 3.2.8) activemodel (3.2.9, 3.2.8) activerecord (3.2.9, 3.2.8) activerecord-mysql2-adapter (0.0.3) activeresource (3.2.9, 3.2.8) activesupport (3.2.9, 3.2.8) arel (3.0.2) builder (3.0.0) bundler (1.2.1) coderay (1.0.8) erubis (2.7.0) fastercsv (1.5.5) hike (1.2.1) i18n (0.6.1) journey (1.0.4) jquery-rails (2.0.3) json (1.7.5) mail (2.4.4) metaclass (0.0.1) mime-types (1.19) mocha (0.12.3) multi_json (1.3.7) mysql (2.8.1) mysql2 (0.3.11) net-ldap (0.3.1) pg (0.14.1) polyglot (0.3.3) rack (1.4.1) rack-cache (1.2) rack-openid (1.3.1) rack-ssl (1.3.2) rack-test (0.6.2) rails (3.2.9, 3.2.8) railties (3.2.9, 3.2.8) rake (10.0.0) rdoc (3.12) rmagick (2.13.1) ruby-openid (2.1.8) shoulda (2.11.3) sprockets (2.2.1, 2.1.3) sqlite3 (1.3.6) thor (0.16.0) tilt (1.3.3) treetop (1.4.12) tzinfo (0.3.35) yard (0.8.3) Results of 'bundle show`: Gems included by the bundle: * actionmailer (3.2.8) * actionpack (3.2.8) * activemodel (3.2.8) * activerecord (3.2.8) * activeresource (3.2.8) * activesupport (3.2.8) * arel (3.0.2) * builder (3.0.0) * bundler (1.2.1) * coderay (1.0.8) * erubis (2.7.0) * fastercsv (1.5.5) * hike (1.2.1) * i18n (0.6.1) * journey (1.0.4) * jquery-rails (2.0.3) * json (1.7.5) * mail (2.4.4) * metaclass (0.0.1) * mime-types (1.19) * mocha (0.12.3) * multi_json (1.3.7) * mysql (2.8.1) * net-ldap (0.3.1) * pg (0.14.1) * polyglot (0.3.3) * rack (1.4.1) * rack-cache (1.2) * rack-openid (1.3.1) * rack-ssl (1.3.2) * rack-test (0.6.2) * rails (3.2.8) * railties (3.2.8) * rake (10.0.0) * rdoc (3.12) * rmagick (2.13.1) * ruby-openid (2.1.8) * shoulda (2.11.3) * sprockets (2.1.3) * sqlite3 (1.3.6) * thor (0.16.0) * tilt (1.3.3) * treetop (1.4.12) * tzinfo (0.3.35) * yard (0.8.3)

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  • How to achieve the following RTO & RPO with logshipping only using SQL Server?

    - by Jimmy Chandra
    Trying to come up with viable backup restore & logshipping solution for achieving the following: 15 minutes Recovery Point Objective (no more than 15 minutes data loss at any time) 5 minutes Recovery Time Objective (must be able to get the db up and running back by 5 minutes) Considering using logshipping only (which I think is kind of pushing it, but I want to know if anyone else know how to achieve this). Some other info for consideration: Using 40 Gbit / sec fiber channel between the primary and disaster recovery (DRC) sites The sites are about 600 km apart. At close of business, the amount of data generated is predicted to be about 150 MB/sec. Log backup is planned for every 5 min. Doing some rough calculation I came up w/ the following numbers: 40 Gbit / sec = 5 MB / sec @ 100% network efficiency. 5 MB / sec = 300 MB / min. @ 300 MB / min, the total amount of data that can be transfer considering the 5min RTO is about 1.5GB, but that will left no time for the actual backup and restore, so if we cut it down to 3min logshipping time, which equals to ~900 MB over 3 minutes at 100% network efficiency, that will left about 1 min backup time and 1 minute restore time. Currently don't have any information if the system being used is capable of restoring 900 MB in 1 min, but assume it can. for COB scenario... 150 MB/sec, and considering the 3 min logshipping time, which should equal to about 27 GB of data over 3 mins...??? I think this is where the SLA will break... since there is no way to transfer 27 GB of data over a 40Gbit/sec line in 3 min. Can I get someone else opinion? I am thinking database mirroring might be a better answer for this...

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  • Why is a FLAC encoded from a decoded MP3 bigger than the MP3?

    - by Ryan Thompson
    To be more precise than in the title, suppose I have a MP3 file that is 320 kbps. If I decompress it, then logically, all the data except for roughly 320 kilobits out of each second of audio should be redundant data, able to be compressed away. So, when I encode the decompressed file to FLAC, or any other lossless codec, why is it so much larger? On a related note, is it theoretically possible to losslessly recover the source mp3 audio from a decompressed wav? (I know the mp3 itself is lossy. I'm asking if it's possible to re-encode without any further loss.) EDIT: Let me clarify the related question, and the rationale behind it. Suppose I have a wav that was decompressed from an MP3 file (and assume I don't have the mp3 itself for some reason). If I don't want to lose any more quality, I can re-encode it with FLAC or any other lossless encoder and get a larger file just to maintain the same quality. Or, I can re-encode it to mp3 again and get the same size as the original but lose more data. Obviously, neither of these cases is ideal. I can either have the original size or the original quality, but not both (I mean the quality of the original mp3, not the original lossless source). My question is: Can we get both? Is it theoretically possible to recover the lossy compressed data from the lossy decompressed data, without losing even more? If it is possible, I could imagine a lossless compression algorithm that compresses the audio with FLAC. Then it also scans the audio for any signs of previous lossy compression, and if detected, recompresses it losslessly to the original lossy file. Then it keeps whichever file is smaller.

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  • How does iperf calculate throughput and jitter?

    - by Someone
    I've read that iperf basically tries to send as much information down a connection as quickly as possible reporting on the throughput achieved. This tool is especially useful in determining the volume of data that links between two machines can supply. is it possible to gather the same results by sending regular data, as in not testing data? what I'm trying to do is this; sending data in the foreground while in the back ground gather statistics (throughput and jitter). so can anyone tell me how iperf calculates these two values ?

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  • How can I get the path to a Windows service executable WITHOUT using sc qc?

    - by Jared
    I need to query a windows service for the path to it's executable via the command prompt. I think the way I would do this is:sc qc myServiceName, but when I do that, I get the following error: [SC] QueryServiceConfig FAILED 122: The data area passed to a system call is too small. [SC] GetServiceConfig needs 1094 bytes I think this means that the sc command is sending a data structure to some other library that is too small for the data that needs to be returned. Instead of SC nicely retrying with a larger data structure (1094 bytes) it bombs out and gives me this ugly error message. Thanks Micro$oft. So is there a way to work around this error? I just need the path to the executable, but will parse it out of some other text if needed.

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  • Can I have 2Gbit over 1Gbit Nics

    - by Daniel
    So this really baffles me. Apparently because 1Gbit can transmit data in both directions simultaneously it should be possible to get 2Gbit of data transfer on a single NIC (1Gbit flow seend and 1Gbit receive). People claim that because 1Gbit is full-duplex (almost always) it is exactly 2Gbit in total. My intuition and electrical background tells me that something is not right here 4 twisted pairs 250Mbit capacity each gives 1Gbit. Unless it is really possible to transfer data in both directions simultaneously. I did a test with iperf. Ubuntu server 12.04 <-- MacBook Pro. Both with decent CPU speed. Tested speed of connection individually and on Mac I can see 112MB/s regardless which direction data is going. On Ubuntu with vnstat and ifstat I got 970Mbit speeds. Now, launching iperf in server mode on both machines at the same time and sending data using 2 iperf clients shows that I'm for example on Ubuntu box sending at 600Mbit, and receiving 350Mbit. which adds up to pretty much 1Gbit link. So to me there is no magical 2Gbit. Can someone confirm that or tell why I'm wrong? Another thing that confuses me i the fact that e.g. 24-port switch has for example: Throughput»up»to:»50.6Mpps Switching»capacity:»68Gbps Switch»fabric»speed:»88Gbps Which would suggest thay can handle 2GBit per port.

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  • Alternatives to Remote Storage Service under Windows Server 2008 R2

    - by ObligatoryMoniker
    I am working on setting up a new Windows Server 2008 R2 file server for our organization and felt like the functionality offered by the Remote Storage Service in previous versions of Windows would meet our needs for segmenting our data so that we can have different backup schedules for different tiers of data based on the frequency of that data being used and updated. What software exists that provide this same or similar functionality for Server 2008 R2?

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  • Adding a single 300Gb SCSI drive to poweredge 2850

    - by John Steele
    I have a 2850 setup with 3 146Gb drives, two partitions 1 12GB system with server 2003 sp2 and 1 261Gb Data. I am strapped on disk space on the data partition having to push data around. I wanted to add a 300Gb single drive for lesser critical data, is this possible? Or is it best to add 2 300Gb drives for another RAID 1 configuration? This is my church network and while it is mission critical it is not enterprise so I can take it down for a few hours. Any pointers to documentation or direct help would be greatly appreciated. John

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  • Windows 2008 R2: can't extend C drive, mystery partitions

    - by wfaulk
    I have a Windows 2008 R2 server running under VMware ESX 4.0.0. I have reallocated disk space to it in order to extend the C drive, but Disk Management has "Extend Volume" greyed out. DISKPART shows more partitions than Disk Management shows, including one after the volume I'm trying to extend, which would explain why Disk Management isn't allowing the extension. Disk Management shows: System Reserved / 100MB NTFS / Healthy (System) (C:) / 39.39 GB NTFS / Healthy (Boot, Page File, Crash Dump) 10.00 GB / Unallocated DISKPART shows: Partition 1 Dynamic Data 992 KB 31 KB Partition 2 Dynamic Data 100 MB 1024 KB Partition 3 Dynamic Data 39 GB 101 MB Partition 4 Dynamic Data 1024 KB 39 GB My question at this point is: what the heck are partitions 1 and 4, where did they come from, why doesn't Disk Management show them, and, most importantly, can I delete partition 4 in order to extend partition 3?

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  • How important is it to install on the program files folder?

    - by eran
    In a proper installation of an average software, its executables would be in the program files folder; its user data in the user's application data folder; it's non user specific data in the all users application data folder; and it should usually be able to run under non-administrative privileges. These guidelines could easily be ignored on XP, but they are an issue on Vista and 7 due to UAC. We're on the verge of releasing a major version of our software. It's a CMS, used by our clients as their main work tool, and their IT staff are well familiar with it. If we want to be fully compatible with Windows 7, we have to make quite a few changes, and we're already on a tight schedule. Question is: we can easily have our clients install our software outside of program files, or have them run it as administrators. I think it's wrong, but I need some ammunition: why should we install on program files, with all the limitations that come with it?

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  • SQL Server 2005 standard filegroups / files for performance on SAN

    - by Blootac
    Ok so I've just been on a SQL Server course and we discussed the usage scenarios of multiple filegroups and files when in use over local RAID and local disks but we didn't touch SAN scenarios so my question is as follows; I currently have a 250 gig database running on SQL Server 2005 where some tables have a huge number of writes and others are fairly static. The database and all objects reside in a single file group with a single data file. The log file is also on the same volume. My interpretation is that separate data files should be used across different disks to lessen disk contention and that file groups should be used for partitioning of data. However, with a SAN you obviously don't really have the same issue of disk contention that you do with a small RAID setup (or at least we don't at the moment), and standard edition doesn't support partitioning. So in order to improve parallelism what should I do? My understanding of various Microsoft publications is that if I increase the number of data files, separate threads can act across each file separately. Which leads me to the question how many files should I have. One per core? Should I be putting tables and indexes with high levels of activity in separate file groups, each with the same number of data files as we have cores? Thank you

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  • How to make TimeMachine back up contents of any path or mounted volume

    - by Olfan
    I keep different types of data in different encrypted sparsebundle images (say, one for each client) which automatically mount upon login but can't be opened by anybody other than myself. So, after login I have a number of virtual volumes in /Volumes/ which keeps my client data both secure and organized. How do I include data inside these virtual Volumes in TimeMachine's backups, or data residing in any path on any partition/volume? I found a promising solution description at blog.eurocomp.info involving editing the com.apple.TimeMachine.plist but all I can get TimeMachine to do is backing up the sparsebundle files themselves. I want it to back up the files inside the mounted image, though - something like adding /Volumes/Client_abc/ to TimeMachine's search path. Please do not redirect my to this previous question as it doesn't solve the problem at all. Please also refrain from telling me why you think I should not want this answer as that will not solve anything either. Please lastly don't say "it can't be done" unless you can technically prove that claim.

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