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  • Send HD video over SONET

    - by Fizzy
    In an effort to test our new OC 192 network, we would like to find a way to stream HD video over it for a demonstration. We are looking for a device or combination of devices that connects to HDMI on one side and has a XFP client interface on the other. I understand this is a ridiculous request and we are planning on an "interesting" solution.

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  • How do large blobs affect SQL delete performance, and how can I mitigate the impact?

    - by Max Pollack
    I'm currently experiencing a strange issue that my understanding of SQL Server doesn't quite mesh with. We use SQL as our file storage for our internal storage service, and our database has about half a million rows in it. Most of the files (86%) are 1mb or under, but even on fresh copies of our database where we simply populate the table with data for the purposes of a test, it appears that rows with large amounts of data stored in a BLOB frequently cause timeouts when our SQL Server is under load. My understanding of how SQL Server deletes rows is that it's a garbage collection process, i.e. the row is marked as a ghost and the row is later deleted by the ghost cleanup process after the changes are copied to the transaction log. This suggests to me that regardless of the size of the data in the blob, row deletion should be close to instantaneous. However when deleting these rows we are definitely experiencing large numbers of timeouts and astoundingly low performance. In our test data set, its files over 30mb that cause this issue. This is an edge case, we don't frequently encounter these, and even though we're looking into SQL filestream as a solution to some of our problems, we're trying to narrow down where these issues are originating from. We ARE performing our deletes inside of a transaction. We're also performing updates to metadata such as file size stats, but these exist in a separate table away from the file data itself. Hierarchy data is stored in the table that contains the file information. Really, in the end it's not so much what we're doing around the deletes that matters, we just can't find any references to low delete performance on rows that contain a large amount of data in a BLOB. We are trying to determine if this is even an avenue worth exploring, or if it has to be one of our processes around the delete that's causing the issue. Are there any situations in which this could occur? Is it common for a database server to come to the point of complete timeouts when many of these deletes are occurring simultaneously? Is there a way to combat this issue if it exists? (cross-posted from StackOverflow )

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  • Small (Micro) 16GB USB flash drive

    - by cust0s
    I'm looking for a small 16GB USB flash drive, that's good looking, will stand the test of time and can be attached to a key ring. I don't want extra software (like that found on the SanDisk Micro Cruzer) and it needs to be compatible with Windows, Mac and Linux. Also, I'd rather pay a bit more than buying a cheap flash drive and then it crapping out on me.

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  • rsync -c -i flags identical files as different

    - by Scott
    My goal: given a list of files on local server, show any differences to the files with the same absolute path on remote server; e.g. compare local /etc/init.d/apache to same file on remote server. "Difference" for me means different checksum. I don't care about file modification times. I also do not want to sync the files (yet); only show the diffs. I have rsync 3.0.6 on both local and remote servers, which should be able to do what I want. However, it is claiming that local and remote files, even with identical checksums, are still different. Here's the command line: $ rsync --dry-run -avi --checksum --files-from=/home/me/test.txt --rsync-path="cd / && rsync" / me@remote:/ where: "me" = my username; "remote" = remote server hostname current working directory is '/' test.txt contains one line reading "/etc/init.d/apache" OS: Linux 2.6.9 Running cksum on /etc/init.d/apache on both servers yields the same result. The files are the same. However, rsync output is: me@remote's password: building file list ... done .d..t...... etc/ cd+++++++++ etc/init.d/ <f+++++++++ etc/init.d/apache sent 93 bytes received 21 bytes 20.73 bytes/sec total size is 2374 speedup is 20.82 (DRY RUN) The output codes (see http://www.samba.org/ftp/rsync/rsync.html) mean that rsync thinks /etc is identical except for mod time /etc/init.d needs to be changed /etc/init.d/apache will be sent to the remote server I don't understand how, with --checksum option, and the files having identical checksums, that rsync should think they're different. (I've tried with other files having identical mod times, and those files are not flagged as different.) I did run this in /, and made sure (AFAIK) that it's run remotely in /, so even relative pathnames will still be correct. I ran rsync with -avvvi for more debug info, but saw nothing remarkable. I'm wondering: is rsync still looking at file mod times, even with --checksum? am I somehow not setting up the path(s) right? what am I doing wrong?

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  • How can I verify the integrity of a WAN connection?

    - by Nic Waller
    We have two scanners in our branch office which upload images to the head office via FTP. In the last week, both scanners have started delivering a lot of corrupted images. I suspect that the problem may be with the WAN link, and that TCP might not be detecting/correcting all errors. Is there any software for Windows that allows me to test the integrity of the connection by sending packets with an embedded CRC?

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  • Recovering files using Recuva

    - by Nev Meek
    I'm currently using Recuva to recover some files from an external NTFS disk. It finds the files I'm interested in during it's analysis phase (when tools like test-disk fail to find them at all) and reports them as "Not-deleted" and a big green marker to signify 100% chance of recovery. However when it tries to recover the files I get a "the system could not find the file specified" message. Is there any easy way to recover non-deleted files off of a disc that I can no longer simply access through explorer?

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  • How to connect to memcached from another machine

    - by Oscar Del Ben
    I'm trying to use memcached from a different machine (which has access to my server), but I can't figure out how. on the memcached machine I can test the connection by running telnet 127.0.0.1 port And it works, but on the other machine it just keeps trying to connect telnet machine_address port Trying machine_address... I'm not sure if I should set up something else to get it working. I know the port is working and accessible because if I try to run other services on it, they works. Os is ubuntu

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  • Ubuntu 9.10 will not boot

    - by Jim
    After an update yesterday my Dell X300 will only boot to a screen with an option to perform 2 memory tests. If I perform these tests, it will only go back to this same screen, offering a choice of memory test again, 86+ or 86+ serial console 115200. This screen is headed - GNU Grub version 1.97 beta 4. This is a full install on my hard drive. How can I get back to booting normally?

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  • Mac OS X Leopard Kernel Panics getting absurd

    - by Henri Watson
    Today Mac OS X kernel panicked twice on me. The first time, I got this log. The second time, I got this log. A few minutes ago, iTunes started sounding blocky, after quitting FireFox everything went back to normal, I am currently using Opera. These are my system's specs. EDIT: I ran the apple hardware test and got these results. Without extended testing: With extended testing:

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  • Proper multimeter specs for fixing capacitors on your motherboard?

    - by Xeoncross
    When our motherboards or LCD's go out it is possible that the capacitors are at fault and can be easily replaced by removing and replacing the bad caps rather than buying new screens or computers. After all, replacing a cap is much faster than building a new PC. Along those lines some of the capacitors I see on my boards are over 900µF. What is the bare minimum you need in a multimeter to test for bad capacitors (or good capacitance?)

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  • Exchange 2010 Internal Auto Discover Migrate away from current .local DNS name

    - by Bryan
    We have an Exchange 2010 Server, running within our Active Directory domain, with an internal hostname of server.example.local. The server is configured for Exchange anywhere, but currently has a self signed certificate with a name of server.example.local installed. Internally, clients connect and work fine, but externally, we are having certificate errors as you would expect. I'm about to purchase a UCC SSL Certificate to install on the server with all the relevant SANs on the certificate to correct this, but due to obvious problem obtaining a trusted cert with .local as a subject alternative name, I'm looking to configure clients on the internal network so that they don't use any reference to the .local hostname. I've configured our external DNS name for the server as exchange.example.com, and have created an CNAME for autodiscover.example.com which also (correctly) points to exchange.example.com. I've also configured internal DNS records for these two hostnames which point to the internal interface of the same server. I don't anticipate any problems here. I'm now trying to reconfigure Auto Discover internally, so that Outlook attempts to connect to exchange.example.com. I've followed the steps in KB940726 to prepare for this, and this appeared to work fine. No errors were generated and I was able to verify the CAS name in AD using ADSI edit. I've just tried testing this with a newly created test user account complete with a new Exchange mailbox, and Outlook 2007 connects fine on the internal network, but looking deeper in the Exchange profile, Outlook is still resolving the server name as server.example.local. Could it be the self signed cert, that is causing Outlook to display the server name as server.example.local, or is there still something wrong with my internal autodiscover configuration? Edit I've proven it isn't the certificate that is responsible for outlook returning server.example.local, by installing another self certified certificate with a name of test.example.com. When creating a new outlook profile, I get the mismatch error I'm expceting, but after accepting the cert, and finishing the config of the Outlook profile, again it still shows server.example.local as the server name. This means that if I were to purchase the UCC cert now, that external client would work fine, but internal clients would show a certificate name mismatch. Any ideas where to start diagnosing this?

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  • Is there a simple way to detect ISP port blocking?

    - by Will M
    Is there a way to tell the difference between my ISP blocking traffic on certain ports and my NAT router/firewall blocking that traffic? The sites “Shields Up” and “Can you see me” show my ports closed or not accessible, but I assume that is primarily due to the NAT router. (Obviously, I could just remove the router, connect directly and use those sites, but is there a simple way to test without doing that?)

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  • Faking the date for a specific shell session

    - by Julien Nicoulaud
    I'm certainly trying to achieve something weird here, but I want to fake the date locally for a shell session on GNU/Linux. I need to black-box test how a program behaves at different dates, and modifying the system-wide date can have unwanted side effects (cron jobs, messed up logs, etc). Any ideas ?

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  • Printer to file

    - by user32912
    Hello I'm looking for a program to windows 7 that will work as a printer but it will save it to a file. Microsoft Word - Printer - Save it to "hello.pdf" on the desktop. I working on a application that will use a printer, but i don't have any printer to test with. And save to .xps files do not work, because u need to write a filename. Hope that you understand! Thanks

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  • On Windows 7, dir or tree can't show unicode characters, even starting cmd with cmd /U

    - by ????
    On Windows 7, dir or tree can't show unicode characters, even starting cmd with cmd /U So I would press Window Key + R to run something, and type in cmd /U so that the content might handle Unicode. And then using dir or tree /F, the content in Unicode won't show as Unicode. (in Window Explorer (file manager), the Unicode will show) Is there a way to handle it? To get Unicode characters to test your filenames, you can go to http://news.google.com/news?edchanged=1&ned=tw and you will be able to get many Unicode characters there (UTF-8)

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  • Unable to telnet out on port 25 on windows server 2008

    - by NickGPS
    Hi All, I just setup a Windows 2008 R2 server and am trying to get a basic mail server up and running so that I can send emails from my applications. I setup a virtual SMTP server in IIS6 and tried doing a local telnet to port 25, which seemed to work fine. There were no errors during this stage and I can see the mail message appear in the Queue folder. The problem is that mail never leaves the Queue folder. I then tried to telnet to a remote mail server on port 25 but couldn't connect:- telnet 209.85.227.27 25 Could not open connection to the host, on port 25: Connection failed) I checked my firewall and there is a default setting to allow all outgoing TCP traffic with no restriction. I even setup a specific rule for outgoing port 25 traffic but to no avail. I then ran a SmtpDiag.exe command .\SmtpDiag.exe [email protected] [email protected] and received the following output Searching for Exchange external DNS settings. Computer name is WIN-SERVERNAME. Failed to connect to the domain controller. Error: 8007054b Checking SOA for gmail.com. Checking external DNS servers. Checking internal DNS servers. SOA serial number match: Passed. Checking local domain records. Checking MX records using TCP: gmail.com. Checking MX records using UDP: gmail.com. Both TCP and UDP queries succeeded. Local DNS test passed. Checking remote domain records. Checking MX records using TCP: gmail.com. Checking MX records using UDP: gmail.com. Both TCP and UDP queries succeeded. Remote DNS test passed. Checking MX servers listed for [email protected]. Connecting to gmail-smtp-in.l.google.com [209.85.227.27] on port 25. Connecting to the server failed. Error: 10060 Failed to submit mail to gmail-smtp-in.l.google.com. Is there any other diagnostics I can do to figure out if it's my firewall or something else? I have removed antivirus to make sure that it wasn't causing the problem. Any ideas would be much appreciated.

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  • Nagios core Event Handler not working

    - by sivashanmugam
    Nagios Event Handler is not triggering when the service is taking more time to response or down. My configuration in below nagios.cfg enable_event_handlers=1 localhost.cfg define service { use generic-service host_name Server service_description test-server servicegroups test-service check_command check-service is_volatile 0 check_period 24x7 max_check_attempts 4 normal_check_interval 2 retry_check_interval 2 contact_groups testcontacts notification_period 24x7 notification_options w,u,c,r notifications_enabled 1 event_handler_enabled 1 event_handler recheck-service } command.cfg define command{ command_name recheck-service command_line /usr/local/nagios/libexec/alert.sh $SERVICESTATE$ $SERVICESTATETYPE$ $SERVICEATTEMPT$ } alert.sh file !/bin/sh set -x case "$1" in OK) # The service just came back up, so don't do anything... ;; WARNING) # We don't really care about warning states, since the service is probably still running... ;; UNKNOWN) # We don't know what might be causing an unknown error, so don't do anything... ;; CRITICAL) Aha! The HTTP service appears to have a problem - perhaps we should restart the server... Is this a "soft" or a "hard" state? case "$2" in We're in a "soft" state, meaning that Nagios is in the middle of retrying the check before it turns into a "hard" state and contacts get notified... SOFT) # What check attempt are we on? We don't want to restart the web server on the first check, because it may just be a fluke! case "$3" in Wait until the check has been tried 3 times before restarting the web server. If the check fails on the 4th time (after we restart the web server), the state type will turn to "hard" and contacts will be notified of the problem. Hopefully this will restart the web server successfully, so the 4th check will result in a "soft" recovery. If that happens no one gets notified because we fixed the problem! 3) echo -n "Going To Ping the Virtual Machine (3rd soft critical state)..." # Call the init script to restart the HTTPD server myresult=`/usr/local/nagios/libexec/check_http xyz.com -t 100 | grep 'time'| awk '{print $10}'` echo "Your Service Is taking the following time Delay" "$myresult Seconds" |mail -s "WARNING : Service Taken More Time To Response" [email protected] ;; esac ;; # The HTTP service somehow managed to turn into a hard error without getting fixed. # It should have been restarted by the code above, but for some reason it didn't. # Let's give it one last try, shall we? # Note: Contacts have already been notified of a problem with the service at this

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  • PHP Sessions suddenly not working

    - by styrken
    Out of no where my php sessions does not work anymore. The server have been running fine for several months. I'am running Ubuntu 11.10 (GNU/Linux 3.0.0-14-server x86_64) with nginx/1.0.11 and php 5.3.19-1~dotdeb.0 Session info copied from phpinfo() Session Support enabled Registered save handlers files user memcached Registered serializer handlers php php_binary wddx Directive Local Value Master Value session.auto_start Off Off session.bug_compat_42 Off Off session.bug_compat_warn Off Off session.cache_expire 180 180 session.cache_limiter nocache nocache session.cookie_domain no value no value session.cookie_httponly Off Off session.cookie_lifetime 0 0 session.cookie_path / / session.cookie_secure Off Off session.entropy_file no value no value session.entropy_length 0 0 session.gc_divisor 1000 1000 session.gc_maxlifetime 1440 1440 session.gc_probability 0 0 session.hash_bits_per_character 5 5 session.hash_function 0 0 session.name PHPSESSID PHPSESSID session.referer_check no value no value session.save_handler files files session.save_path /tmp /tmp session.serialize_handler php php session.use_cookies On On session.use_only_cookies On On session.use_trans_sid 0 0 I have setup the following php script to test with: error_reporting(E_ALL); ini_set('display_errors', true); error_log($_SERVER['REMOTE_ADDR'] . ' visited test page'); if(session_start()) echo "Session started <br />"; else echo "Session failed <br />"; echo '<a href="?', time(), '">refresh</a>', "\n"; echo '<pre>'; echo 'session id: ', session_id(), "\n"; $sessionfile = ini_get('session.save_path') . '/' . 'sess_'.session_id(); echo 'session file: ', $sessionfile, ' '; if ( file_exists($sessionfile) ) { echo 'size: ', filesize($sessionfile), "\n"; echo '# ', file_get_contents($sessionfile), ' #'; } else { echo ' does not exist'; } echo PHP_EOL; $_SESSION['number'] = (int) @$_SESSION['number'] + 1; var_dump($_SESSION); echo "</pre>\n"; session_write_close(); echo 'done.'; It tells me that the session file exists, but my session id changes on each refresh.. What is going wrong? There is no output to any error logs at all.. :/ Please help!

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  • Tools to Hide IP address for webapp

    - by Jake Barti
    I am looking out for a paid software where I can 'choose' an IP address from a different country and browse a site. So if I want to see how the site will look to US users, I should be able to choose the IP from US. We are building a web app that will be used in many countries and we want to make sure we test it before releasing. Any recommendations ?

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  • Cannot Delete Application Pool

    - by redsquare
    I am trying to tidy up an IIS server. I have removed some test/uat virtual directories however I am not able to remove the application pools. I get the following error message. Any hints on how I go about resolving this?

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  • Lost SSH Key, is it possible to log in via some other method now?

    - by Daniel Hai
    So I happened to do the cardinal sin of administration. I changed the openssh settings, and accidently closed that terminal before I could test it, and of course, now I'm completely locked out. I was using password-less private key authentication. Am I completely screwed out of my server? This is a VPS system -- is there a way where I could have someone at the datacenter log in locally and redo the ssh settings?

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  • How to make a sample file with Handbrake

    - by MaxMackie
    I want to test a couple things with my encode before I encode the whole file. Is there a way for me to make a sample file (30 seconds long or something like that) that I can analyse using different applications (not just the built in sample preview). By the way, I'm using the OSX Handbrake. Alternatively, the question can be stated as: "Where does handbrake store the short sample video files after creating them?"

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