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• How to make 7zip faster

  - by user34463

  I normally use winRAR over 7Zip simply because its faster and only a little less efficient with compression. I did a few tests on different filetypes and sizes comparing the 7zip and winRAR default settings on their normal compression and their best compression, and in a lot of cases winRAR was 50% faster and in some it was actually 100% faster. But, I do like FOSS more. So here are my questions: Is there a way to make 7zip speed up? I'd like it to at least be on par with rar's speed Is there a way to make recovery segments in 7zip like you can in rar? I didn't see any, but I guess it could be a command line thing. I tested winrar and 7zip using the latest stable version of each (4.something with 7zip). Is the 9.x beta release noticeably faster at compression? I'm talking about faster at a comparable setting in WinRAR, not just lowering to bare minimum compression. If it matters, I use a quad core intel i7 720 (1.6ghz)/(2.8ghz) with 4gb DDR3 ram, and the 64-bit version of 7zip.

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• Filesystems for webserver with SATA and Solid State disk,

  - by Jorisslob

  We have just ordered a new webserver with 120 Gb solid state disk and a SATA disk. I am trying to plan ahead what sort of filesystem to use. This system will be running Linux, Apache/Tomcat to host java services. The main service is a system where people can upload reasonably large files (in the order of 100 Mb, images, image stacks and video), which people will be able to annotate and which will be sent to a database server when annotation is complete. Thus far, I plan to put most of the utility programs of the operating system om the SSD and put the large media files there. The SATA disks will hold the less volitile data like apache, tomcat and the servlets. For filesystems I have considered going for the stable EXT3 because I hear that it is best supported. The downside seems to be that it not the ideal choice for large files. That is why I am leaning towards using XFS for the SSD and EXT3 for the SATA. My questions are: 1) Does this sound like a reasonable setup? 2) What filesystems would you recommend for the SSD and for the SATA? Thanks

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• RoboCopy fails with "the specified network name is no longer available"

  - by Justin Scott

  We have a scheduled task that runs robocopy periodically to mirror a rather large folder structure from one server to another (thousands of folders, 100,000+ files, 50+ GB in size). There is a share on the receiving server where the mirror gets stored. We're running the task from the origin server connecting out to the share on the receiving end. Both servers run Windows Server 2003 and are connected to the same network switch (100Mbps). The process will sometimes complete all the way through without error. More often than not, however, at some point during the process (seems random as to where), robocopy will fail with the error The specified network name is no longer available. It will wait 30 seconds and try the file again and eventually give up after a number of retries. Process will repeat at the next schedule interval and may complete... or not. When this occurs I am not able to access the share at all on the destination server from anywhere on the network for up to 30 minutes. There is nothing else on the network using this share. My question is what does this error mean specifically? Why is the share "dropping off" and becoming inaccessible? Is there a way to prevent it and get the file mirroring to be more stable?

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• How to figure out how much RAM each prefork thread requires for maximum Wordpress performance on an EC2 small instance

  - by two7s_clash

  Just read Making WordPress Stable on EC2-Micro In the "Tuning Apache" section, I can't quite figure out how he comes up with his numbers for his prefork config. He explains how to get the numbers for an average process, which I get. But then: Or roughly 53MB per process...In this case, ten threads should be safe. This means that if we receive more than ten simultaneous requests, the other requests will be queued until a worker thread is available. In order to maximize performance, we will also configure the system to have this number of threads available all of the time. From 53MB per process, with 613MB of RAM, he somehow gets this config, which I don't get: <IfModule prefork.c> StartServers 10 MinSpareServers 10 MaxSpareServers 10 MaxClients 10 MaxRequestsPerChild 4000 </IfModule> How exactly does he get this from 53MB per process, with 613MB limit? Bonus question From the below, on a small instance (1.7 GB memory), what would good settings be? bitnami@ip-10-203-39-166:~$ ps xav |grep httpd 1411 ? Ss 0:00 2 0 114928 15436 0.8 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf 1415 ? S 0:06 10 0 125860 55900 3.1 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf 1426 ? S 0:08 19 0 127000 62996 3.5 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf 1446 ? S 0:05 48 0 131932 72792 4.1 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf 1513 ? S 0:05 7 0 125672 54840 3.1 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf 1516 ? S 0:02 2 0 125228 48680 2.7 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf 1517 ? S 0:06 2 0 127004 55796 3.1 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf 1518 ? S 0:03 1 0 127196 54208 3.0 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf 1531 ? R 0:04 0 0 127500 54236 3.0 /opt/bitnami/apache2/bin/httpd -f /opt/bitnami/apache2/conf/httpd.conf

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• Nginx dynamic upstream configuration / routing

  - by Dan Sosedoff

  I was experimenting with dynamic upstream configuration for nginx and cant find any good solution to implement upstream configuration from third-party source like redis or mysql. The idea behind it is to have a single file configuration in primary server and proxy requests to various app servers based on environment conditions. Think of dynamic deployments where you have X servers that are running Y workers on different ports. For instance, i create a new app and deploy. App manager selects a server and then rolls out a worker (Ruby/PHP/Python) and then reports the ip:port to the central database with status "up". At this time when i go to the given url nginx should proxy all requests to the specified ip:port upstream. The whole thing is pretty similar to what heroku does, except this proof-of-concept is not supposed to be production ready, mostly for internal needs. The easiest solution i found was using resolver with ruby-based DNS server. It works, nginx gets the IP address correctly, but the only problem is that you cant define port number for that IP. Second solution (which i havent tried yet) is to roll something else as a proxy server, maybe written in Erlang. In this case we need to use something to serve static content. Any ideas how to implement this in more flexible and stable way? P.S. Some research options: http://openresty.org/#DynamicRoutingBasedOnRedis https://github.com/nodejitsu/node-http-proxy

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• Exchange 2007 restore - Backup Exec Unable to Attach to a resource

  - by Andy

  I have been struggling with this one for months! Grateful for any advice. The setup is a windows 2003 server network, 4xservers on the domain. Two exchange 2007 servers (only one with mailboxes still on). Backup Exec (12.5) on a non-exchange server with agents on the others. Backup exec runs a full backup of exchange across the network well, at pretty reasonable speeds. However, when you try any kind of restore (individual emails, mailboxes or whole system restore - all to same location or to alternate server, RSG etc) the following message is received within about 10-15 secs of starting the job: Job ended: 24 December 2010 at 13:28:32 Completed status: Failed Final error: 0xe000848c - Unable to attach to a resource. Make sure that all selected resources exist and are online, and then try again. If the server or resource no longer exists, remove it from the selection list. Edit the selection list properties, click the View Selection Details tab, and then remove the resource. Final error category: Resource Errors For additional information regarding this error refer to link V-79-57344-33932 Things I have already tried: Changed account to main administrator account (with all permissions) checked versions of ese.dll on both servers - both the same Checked all VSS writers on both servers are stable / normal restoring to different locations Any advice anyone could give would be much appreciated. Many thanks, Andy

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• HAProxy + NodeJS gets stuck on TCP Retransmission

  - by sled

  I have a HAProxy + NodeJS + Rails Setup, I use the NodeJS Server for file upload purposes. The problem I'm facing is that if I'm uploading through haproxy to nodejs and a "TCP (Fast) Retransmission" occurs because of a lost packet the TX rate on the client drops to zero for about 5-10 secs and gets flooded with TCP Retransmissions. This does not occur if I upload to NodeJS directly (TCP Retransmission happens too but it doesn't get stuck with dozens of retransmission attempts). My test setup is a simple HTML4 FORM (method POST) with a single file input field. The NodeJS Server only reads the incoming data and does nothing else. I've tested this on multiple machines, networks, browsers, always the same issue. Here's a TCP Traffic Dump from the client while uploading a file: ..... TCP 1506 [TCP segment of a reassembled PDU] >> everything is uploading fine until: TCP 1506 [TCP Fast Retransmission] [TCP segment of a reassembled PDU] TCP 66 [TCP Dup ACK 7392#1] 63265 > http [ACK] Seq=4844161 Ack=1 Win=524280 Len=0 TSval=657047088 TSecr=79373730 TCP 1506 [TCP Retransmission] [TCP segment of a reassembled PDU] >> the last message is repeated about 50 times for >>5-10 secs<< (TX drops to 0 on client, RX drops to 0 on server) TCP 1506 [TCP segment of a reassembled PDU] >> upload continues until the next TCP Fast Retransmission and the same thing happens again The haproxy.conf (haproxy v1.4.18 stable) is the following: global log 127.0.0.1 local1 debug maxconn 4096 # Total Max Connections. This is dependent on ulimit nbproc 2 defaults log global mode http option httplog option tcplog frontend http-in bind *:80 timeout client 6000 acl is_websocket path_beg /node/ use_backend node_backend if is_websocket default_backend app_backend # Rails Server (via nginx+passenger) backend app_backend option httpclose option forwardfor timeout server 30000 timeout connect 4000 server app1 127.0.0.1:3000 # node.js backend node_backend reqrep ^([^\ ]*)\ /node/(.*) \1\ /\2 option httpclose option forwardfor timeout queue 5000 timeout server 6000 timeout connect 5000 server node1 127.0.0.1:3200 weight 1 maxconn 4096 Thanks for reading! :) Simon

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• Why are my Windows 7 updates continuously failing?

  - by Chris C.

  I'm an advanced level user here with an odd issue. I have two Windows Updates that are failing to install, every single time. I'm getting a mysterious "Code 1" error on both updates, an error for which I'm having difficulty finding a solution. The updates in question are: Security Update for Microsoft Visual C++ 2008 Service Pack 1 Redistributable Package (KB2538243) System Update Readiness Tool for Windows 7 for x64-based Systems (KB947821) [May 2011] Because these updates are failing, the Shut Down button in my start menu always has the shield icon next to it, indicating that "new" updates will be installed on shut down. But, of course, they'll fail and when the PC is restarted, the shield icon is still there. When checking the update history and viewing the details of the failed updates, I get the following: Security Update for Microsoft Visual C++ 2008 Service Pack 1 Redistributable Package (KB2538243) Installation date: ?6/?29/?2011 3:00 AM Installation status: Failed Error details: Code 1 Update type: Important A security issue has been identified leading to MFC application vulnerability in DLL planting due to MFC not specifying the full path to system/localization DLLs. You can protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. More information: http://go.microsoft.com/fwlink/?LinkId=216803 System Update Readiness Tool for Windows 7 for x64-based Systems (KB947821) [May 2011] Installation date: ?6/?28/?2011 3:00 AM Installation status: Failed Error details: Code 1 Update type: Important This tool is being offered because an inconsistency was found in the Windows servicing store which may prevent the successful installation of future updates, service packs, and software. This tool checks your computer for such inconsistencies and tries to resolve issues if found. More information: http://support.microsoft.com/kb/947821 About My System I'm running Windows 7 Home Premium x64 Edition. This is a custom PC build and the OS was installed fresh, not an upgrade from a previous version. I've been running this system for about 4 months. Windows Updates aside, the system is usually quite stable. Thanks in advance for your help!

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• How do I install OpenStack on a single Ubuntu 12.04 node?

  - by Sam Edwards

  I'm having trouble installing OpenStack in Ubuntu 12.04, for various reasons: The official Ubuntu website recommends Juju and MAAS. However, this is a single node I am trying to get OpenStack installed on, and MAAS requires "two or more nodes" according to the docs. Additionally, I don't have any experience in MAAS and Juju and would rather stick to technologies I am more familiar with so that I can debug problems that arise. I have tried StackGeek but this fails because the node only has a single Ethernet port. The node does, however, have the second hard drive required for the nova storage. I have tried DevStack but cannot log into the dashboard. The login form appears fine, but as soon as I try to submit the page, my browser begins loading indefinitely. I have tried installing straight from packages, but I get an Internal Server Error in the dashboard upon trying to log in, with no helpful logs anywhere in sight to aid me in debugging the issue. Each of these attempts was with a fresh Ubuntu 12.04 LTS setup; I'm finding it really strange that no matter what I try, I cannot get OpenStack installed. Is this even a stable/mature project? Why am I encountering so many bugs?

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• RTL8192SU Linux Issue Installing Driver

  - by s32ialx

  OK I've read tons of fourms of people getting the onboard RTL8192SE working and the RTL8192SU working dif is U = USB they are both N and i have both Toshiba L500D-00T pre-installed Win Vistax64-HP and i have obtained the free Win7x64-HP upgrade the onboard wificard sucks and can't hold a stable connection for more then 20minutes in windows but the usb is amazing. Now problem is i tried both Ubuntu and Mandriva with no resolve the issue is the onboard drive detects and actually SHOWS that it's there but no wireless networks detect so it's saying no SSID's are broadcasting which i know is a lie since I'm running a 2wire bell dsl modem with built in wifi and a Linksys wrt54g w/ DD-WRT firmware and both are broadcasting fine. Why don't i use the USB? In the hardware device manager in mandriva it shows up as unknown but shows that it's realtek and that it's a 8192 chipset. but no option to for a driver install and when i do a make in terminal i get this error and no clue what it means [root@John-PC rtl8192se_linux_2.6.0010.1020.2009_64bit]# make make: *** /lib/modules/2.6.31.12-desktop-3mnb/build: No such file or directory. Stop. make: *** [all] Error 2 [root@John-PC rtl8192se_linux_2.6.0010.1020.2009_64bit]# any help appreciated. and just encase I'm running currently Mandriva Spring 2010 Free

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• Network monitoring tools with API features

  - by Kev

  We use ks-soft's Advanced Hostmonitor package to monitor around 2000 items on our network. We think it's great, the chap that supports it is fantastic, the product is fast, stable and mature but I feel as as we grow as a company it's beginning to show some friction points in the area of integration with our back office admin systems. One of the things we'd like to do is be able to add new tests to whatever monitoring tool we use via an API. For example, when orders for servers come from our retail interface, the server gets built automatically, and as part of the automated build process we'd like to automatically add new tests to the network monitoring systems. Hostmonitor has some support for this via a feature called HM Script but we're starting to encounter some speedbumps - we can't add new operators/users we can't define new "Action Profiles" - these are the actions to be taken when a test goes good or bad. What we love about hostmonitor though are the Action Profiles. For example if a Windows IIS box goes bad our action profile for a bad test does something like: Check host again (one time) Wait another 30 seconds then test again Try restart app pool on remote machine (up to two times) Send an email to ops about the restart failure Try restarting IIS on remote machine (up to four times) Page duty admin (up to 5 times - stops after duty admin ACKS alert) Page backup duty admin (5 times - stops after duty admin ACKS alert) I'm starting to look around at other network monitoring tools and I'm looking for: a comprehensive API to be able to add/remove/control tests/test "action profiles"/operators (not just plugins, we need control and admin interfaces) the ability to have quite detailed action/escalation profiles (and define these via an API) I've looked at Nagios and Icinga but Ican't seem to glean from their documentation whether we could have these features or not, or if we could, how much work would be involved to implement/customise. Can anyone provide any advice, guidance or experiences?

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• Puppet: array in parameterized classes VS using resources

  - by Luke404

  I have some use cases where I want to define multiple similar resources that should end up in a single file (via a template). As an example I'm trying to write a puppet module that will let me manage the mapping between MAC addresses and network interface names (writing udev's persistent-net-rules file from puppet), but there are also many other similar usage cases. I searched around and found that it could be done with the new parameterised classes syntax: if implemented that way it should end up being used like this: node { "myserver.example.com": class { "network::iftab": interfaces => { "eth0" => { "mac" => "ab:cd:ef:98:76:54" } "eth1" => { "mac" => "98:76:de:ad:be:ef" } } } } Not too bad, I agree, but it would rapidly explode when you manage more complex stuff (think network configurations like in this module or any other multiple-complex-resources-in-a-single-config-file stuff). In a similar question on SF someone suggested using Pienaar's puppet-concat module but I doubt it could get any better than parameterised classes. What would be really cool and clean in the configuration definition would be something like the included host type, it's usage is simple, pretty and clean and naturally maps to multiple resources that will end up being configured in a single place. Transposed to my example it would be like: node { "myserver.example.com": interface { "eth0": "mac" => "ab:cd:ef:98:76:54", "foo" => "bar", "asd" => "lol", "eth1": "mac" => "98:76:de:ad:be:ef", "foo" => "rab", "asd" => "olo", } } ...that looks much better to my eyes, even with 3x options to each resource. Should I really be passing arrays to parameterised classes, or there is a better way to do this kind of stuff? Is there some accepted consensus in the puppet [users|developers] community? By the way, I'm referring to the latest stable release of the 2.7 branch and I am not interested in compatibility with older versions.

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• Apache2 will not start on OpenSUSE after enabling mod_pagespeed

  - by alpha1

  I have a linode VPS, running openSUSE 12.1 (A little outdated, but stable). I have installed the RPMS for mod_pagespeed. mod_pagespeed.conf has "ModPagespeed on". Restarting apache fails after enabling pagespeed. the errors are not very helpful. li361-39:/usr/lib64/apache2 # a2enmod pagespeed li361-39:/usr/lib64/apache2 # service apache2 restart redirecting to systemctl Job failed. See system logs and 'systemctl status' for details. li361-39:/usr/lib64/apache2 # systemctl status apache2.service apache2.service - apache Loaded: loaded (/lib/systemd/system/apache2.service; enabled) Active: failed since Thu, 06 Jun 2013 20:49:00 +0000; 1s ago Process: 6701 ExecStop=/usr/sbin/httpd2 -D SYSTEMD -k stop (code=exited, status=0/SUCCESS) Process: 6704 ExecStart=/usr/sbin/start_apache2 -D SYSTEMD -k start (code=exited, status=1/FAILURE) Main PID: 6637 (code=exited, status=0/SUCCESS) CGroup: name=systemd:/system/apache2.service li361-39:/usr/lib64/apache2 # a2dismod pagespeed li361-39:/usr/lib64/apache2 # service apache2 restart redirecting to systemctl li361-39:/usr/lib64/apache2 # And the error log (/var/log/apache2/error_log) is useless as well. [Thu Jun 06 20:48:59 2013] [notice] caught SIGTERM, shutting down [Thu Jun 06 20:49:12 2013] [warn] Init: Session Cache is not configured [hint: SSLSessionCache] [Thu Jun 06 20:49:13 2013] [notice] Apache/2.2.21 (Linux/SUSE) mod_ssl/2.2.21 OpenSSL/1.0.0k PHP/5.4.15 configured -- resuming normal operations EDIT This is from /var/log/messages Jun 12 14:24:14 li361-39 start_apache2[27951]: httpd2-prefork: Syntax error on line 116 of /etc/apache2/httpd.conf: Syntax error on line 34 of /etc/apache2/sysconfig.d/loadmodule.conf: Cannot load /usr/lib64/apache2/mod_pagespeed.so into server: /usr/lib64/apache2/mod_pagespeed.so: undefined symbol: ap_unixd_config Full Log is here: http://pastebin.com/hjnbZZTr I've tried looking for other logs and checking the mod_pagespeed.conf against posts claiming it works and nothing is striking as wrong. Any Ideas?

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• Apache 2.2, worker mpm, mod_fcgid and PHP: Can't apply process slot

  - by mopoke

  We're having an issue on an apache server where every 15 to 20 minutes it stops serving PHP requests entirely. On occasions it will return a 503 error, other times it will recover enough to serve the page but only after a delay of a minute or more. Static content is still served during that time. In the log file, there's errors reported along the lines of: [Wed Sep 28 10:45:39 2011] [warn] mod_fcgid: can't apply process slot for /xxx/ajaxfolder/ajax_features.php [Wed Sep 28 10:45:41 2011] [warn] mod_fcgid: can't apply process slot for /xxx/statics/poll/index.php [Wed Sep 28 10:45:45 2011] [warn] mod_fcgid: can't apply process slot for /xxx/index.php [Wed Sep 28 10:45:45 2011] [warn] mod_fcgid: can't apply process slot for /xxx/index.php There is RAM free and, indeed, it seems that more php processes get spawned. /server-status shows lots of threads in the "W" state as well as some FastCGI processes in "Exiting(communication error)" state. I rebuilt mod_fcgid from source as the packaged version was quite old. It's using current stable version (2.3.6) of mod_fcgid. FCGI config: FcgidBusyScanInterval 30 FcgidBusyTimeout 60 FcgidIdleScanInterval 30 FcgidIdleTimeout 45 FcgidIOTimeout 60 FcgidConnectTimeout 20 FcgidMaxProcesses 100 FcgidMaxRequestsPerProcess 500 FcgidOutputBufferSize 1048576 System info: Linux xxx.com 2.6.28-11-server #42-Ubuntu SMP Fri Apr 17 02:45:36 UTC 2009 x86_64 GNU/Linux DISTRIB_ID=Ubuntu DISTRIB_RELEASE=9.04 DISTRIB_CODENAME=jaunty DISTRIB_DESCRIPTION="Ubuntu 9.04" Apache info: Server version: Apache/2.2.11 (Ubuntu) Server built: Aug 16 2010 17:45:55 Server's Module Magic Number: 20051115:21 Server loaded: APR 1.2.12, APR-Util 1.2.12 Compiled using: APR 1.2.12, APR-Util 1.2.12 Architecture: 64-bit Server MPM: Worker threaded: yes (fixed thread count) forked: yes (variable process count) Server compiled with.... -D APACHE_MPM_DIR="server/mpm/worker" -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) -D APR_USE_SYSVSEM_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D DYNAMIC_MODULE_LIMIT=128 -D HTTPD_ROOT="" -D SUEXEC_BIN="/usr/lib/apache2/suexec" -D DEFAULT_PIDLOG="/var/run/apache2.pid" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types" -D SERVER_CONFIG_FILE="/etc/apache2/apache2.conf" Apache modules loaded: alias.load auth_basic.load authn_file.load authz_default.load authz_groupfile.load authz_host.load authz_user.load autoindex.load cgi.load deflate.load dir.load env.load expires.load fcgid.load headers.load include.load mime.load negotiation.load rewrite.load setenvif.load ssl.load status.load suexec.load PHP info: PHP 5.2.6-3ubuntu4.6 with Suhosin-Patch 0.9.6.2 (cli) (built: Sep 16 2010 19:51:25) Copyright (c) 1997-2008 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies

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• What open source ecommerce webshops offer #1: usability, #2: PayPal integration, and #3: ease of administration and use

  - by Jonathan Hayward

  I've spent several days trying to deploy Satchmo, in the process asking several questions about deployment (http://stackoverflow.com/questions/11277407/can-anyone-explain-this-error-message-deploying-a-satchmo-project-under-gunicorn, http://stackoverflow.com/questions/11277685/is-there-a-howto-to-fcgi-for-deploying-satchmo, and http://stackoverflow.com/questions/11278295/what-is-the-most-stable-release-of-satchmo). Django's tagline is "The web framework for perfectionists with deadlines," and Satchmo's tagline is equally forceful: "The webshop for perfectionists with deadlines." I'm looking more to set up, configure, design, etc., rather than code for this one, and I'm taking a bit of a hint that for me at least the "with deadlines" bit is something that I cannot manage. Deployment has been a time sink. So, taking a step back, I don't specifically need to edit and extend the source code; what I want are first, good usability and a clean experience for the end-user, then being easy to deploy/install/manage/maintain, and enough so that even if you're having a slow day it should at most be one day's work to install, one day's work to get running, and one day's work to rebrand as white label (for simple branding). What ecommerce webshops should I be looking at?

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• MySQL replication - rapidly growing relay bin logs

  - by Rob Forrest

  Morning all, I've got a really strange situation here this morning much like a reportedly fixed MySQL bug. http://bugs.mysql.com/bug.php?id=28421 My relay bin logs are rapidly filling with an infinite loop of junk made of this sort of thing. #121018 5:40:04 server id 101 end_log_pos 15598207 #Append_block: file_id: 2244 block_len: 8192 # at 15598352 #121018 5:40:04 server id 101 end_log_pos 15606422 #Append_block: file_id: 2244 block_len: 8192 # at 15606567 ... # at 7163731 #121018 5:38:39 server id 101 end_log_pos 7171801 #Append_block: file_id: 2243 block_len: 8192 WARNING: Ignoring Append_block as there is no Create_file event for file_id: 2243 # at 7171946 #121018 5:38:39 server id 101 end_log_pos 7180016 #Append_block: file_id: 2243 block_len: 8192 WARNING: Ignoring Append_block as there is no Create_file event for file_id: 2243 These log files grow to 1Gb within about a minute before rotating and starting again. These big files are interspersed with 1 or 2 smaller files with just this in /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; # at 4 #121023 9:43:05 server id 100 end_log_pos 106 Start: binlog v 4, server v 5.1.61-log created 121023 9:43:05 BINLOG ' mViGUA9kAAAAZgAAAGoAAAAAAAQANS4xLjYxLWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAUwAEGggAAAAICAgC '/*!*/; # at 106 #121023 9:43:05 server id 100 end_log_pos 156 Rotate to mysqld-relay-bin.000003 pos: 4 DELIMITER ; # End of log file ROLLBACK /* added by mysqlbinlog */; /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; We're running a master-master replication setup with the problematic server running mysql 5.1.61. The other server which is, for the moment, stable is running 5.1.58. Has anyone got any ideas what the solution is to this and moreover, what might have caused this?

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• Atlassian Crucible very slow on large repository

  - by Mitch Lindgren

  Hi everyone, My company has been running a trial of Atlassian Crucible for some months now. For repositories where it's working properly, users have given very positive feedback about the tool. The problem I'm having is that we have several different projects, each with its own repository, and some of those repositories are very large. One repository in particular has a large number of branches and probably around 9,000 files per branch. Browsing that repository in Crucible is extremely slow. Crucible is running on a CentOS VM. The VM has 4GB of RAM, and I've set Crucible's maximum at 3GB, of which it is currently using 2GB. I've brought this up in a support ticket with Atlassian, and they suggested the following: In particular because you have a rather large SVN repository you will likely find that Fisheye will be creating a large index file on disk. To help improve performance a few things you can try are: Increasing the available memory available to Fisheye (see the document above). Migrating to an external database: confluence.atlassian.com/display/FISHEYE/Migrating+to+an+External+Database Excluding files and directories from your index that aren't needed: confluence.atlassian.com/display/FISHEYE/Allow+(Process) (Sorry for not hyperlinking; don't have the rep.) I've tried all of these things to an extent, but so far none have helped greatly. I was originally running Crucible on a Windows box with 2GB of RAM using the built in HSQL DB. Moving to MySQL on CentOS saw a performance increase for some repositories, and made Crucible much more stable, but did not seem to help much with our biggest repository. There are only so many files/branches I can exclude from indexing while maintaining the tool's usefulness. That being the case, does anyone have any tips on how to speed up Crucible on large repositories, without investing in insanely powerful hardware? Thanks! Edit: To clarify, since I didn't mention it explicitly above, I am using FishEye.

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• Computer randomly freezes when playing games

  - by TutorialPoint

  My computer just randomly freezes when playing certain games. It has happened to me in Battlefield: Bad Company 2, Call of Duty 4, and Blacklight: Retribution. It has not happened to me with other games like Tribes: Ascend yet, which leads me to believe it is a software-side issue related to maybe DirectX or PhysX? Also, temperatures seem stable. I used RivaTuner combined with MSI Afterburner, and at the time of freezing with BF:BC2, it gives: 62C, 67% GPU usage and 78.8FPS. During the session the max I have seen was 65C and 97% GPU usage. On Blacklight: Retribution, I've heard other people complain about the problem too. This is why it is such a mystery to me, is this actually a driver problem, or more a game problem? I've been able to play these games for long until I re-installed Windows 7 (because it was growing too full and slow). Before I had a 32bit Ultimate version, and now 64bit. Specs: O/S: Windows 7 64bit Ultimate CPU: Intel i5-750 @ Default 2.66 GHz GPU: ASUS EAH5770 1GB PSU: CoolerMaster Real Power M520 (520W) MB: Gigabyte P55M-UD2 Catalyst Control Center version (in "About"): 2012.0214.2218.39913

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• Exporting Client Data from Groupwise 6.5 to Outlook 2010 without Crashing

  - by Adam Doherty

  My employer has recently moved from Novell GroupWise 6.5 to Exchange 2010. We've imposed mailbox limits on staff but we still need to move their old messages, contacts, calendars, etc. over to Outlook 2010. Our problem however is this, utilizing the Novell MAPI client is slow within Outlook 2010 and upon exporting messages to a PST file (for later re-attachment, and offline backup purposes) crashes the GroupWise server. Connecting to the server in Outlook via IMAP to export messages to PST is faster and apparently more stable but also crashes the server. We'll be keeping our GroupWise server online internally until then end of the year but I have staff with mailboxes approaching 12 gigabytes, which is fine if we're going to move the data to offline storage (DVD set) but if I keep crashing the server every time I try to get the data I'll just be spinning my wheels. In my first attempts, I tried to move mail for a staff member with 3GB of data. The transfer lasted roughly 8 hours before crashing. I'm wondering if there is an open source solution to my problem. Paid solutions exist but we're a not-for-profit organization and have too many staff to justify the costs of per seat licenses just to migrate mail.

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• I must clear my cmos to be able to boot

  - by Fredou

  I have this Asus p7p55d-e pro for about 8 months(got it last July) and for this last 3-4 days I cannot boot without clearing my CMOS what I have is: Seasonic M12D 750W ASUS P7P55D-E Pro Intel Core i5 760 Quad Core Processor Lynnfield LGA1156 XFX GeForce® 8800 GT Alpha Dog 512MB DDR3 Standard (PV-T88P-YDF4) 2x Corsair XMS3 CMX4GX3M2A1600C7 4GB DDR3 2X2GB DDR3-1600 CL 7-8-7-20 I tried to remove all the unnecessary stuff: HD/dvd/pci card/usb cable/etc I tried with only 1 dimm filled, instead of my 4, each one individually it didn't work I tried changing the battery, here goes a few dollars to nowhere, didn't work if I don't reset the CMOS it sometime stock on RAM led, sometime on BOOT DEVICE led, when this happen, it stuck on CPU speed detection when I boot right after the reset, i MUST click on the F2 option (boot with default bios setting) if i go into the bios and save/restart, i have to reset it again when booted, everything is rock solid stable, tried memtest, cpu stress, etc, etc. without issue what should be my next step? trying a new psu? (i need to find one..) doing rma? (i need this mb since it's my only computer...) something else?

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• How to make 7-Zip faster

  - by Matt

  I normally use WinRAR over 7-Zip simply because it's faster and only a little less efficient with compression. I did a few tests on different filetypes and sizes comparing the 7-Zip and WinRAR default settings on their normal compression and their best compression, and in a lot of cases WinRAR was 50% faster and in some it was actually 100% faster. But, I do like FOSS more. So here are my questions: Is there a way to make 7-Zip speed up? I'd like it to at least be on par with WinRAR's speed Is there a way to make recovery segments in 7-Zip like you can in WinRAR? I didn't see any, but I guess it could be a command line thing. I tested WinRAR and 7-Zip using the latest stable version of each (4-dot-something with 7-Zip). Is the 9.x beta release noticeably faster at compression? I'm talking about faster at a comparable setting in WinRAR, not just lowering to bare minimum compression. If it matters, I use a quad core Intel i7 720 (1.6 GHz)/(2.8 GHz) with 4 GB DDR3 RAM, and the 64-bit version of 7-Zip, and dual-boot Debian x64 5.0.4 and Windows 7 Home.

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• Puppet and Vim fighting over Ruby version

  - by devians

  I have installed puppet from the .dmg from puppetlabs. If I remove ruby 1.9.3, puppet works, but other things like my vim install (dependant plugins) do not. According to http://docs.puppetlabs.com/guides/platforms.html#ruby-versions 1.9.3 is supported. So whats going wrong with puppet? % uname -a Darwin Kusanagi.local 11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64 % which ruby /usr/local/bin/ruby % ruby --version ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-darwin11.4.2] % /usr/bin/ruby --version ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin11.0] % brew info ruby 1 ? ruby: stable 1.9.3-p327, HEAD http://www.ruby-lang.org/en/ Depends on: pkg-config, readline, gdbm, libyaml /usr/local/Cellar/ruby/1.9.3-p327 (796 files, 17M) * https://github.com/mxcl/homebrew/commits/master/Library/Formula/ruby.rb ==> Options --with-tcltk Install with Tcl/Tk support --with-suffix Suffix commands with "19" --universal Build a universal binary --with-doc Install documentation ==> Caveats NOTE: By default, gem installed binaries will be placed into: /usr/local/Cellar/ruby/1.9.3-p327/bin You may want to add this to your PATH. % puppet /usr/local/Cellar/ruby/1.9.3-p327/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- puppet/util/command_line (LoadError) from /usr/local/Cellar/ruby/1.9.3-p327/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/bin/puppet:3:in `<main>'

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• time sync with ntpd

  - by guthrie

  I run Debian on several systems, and their times do not seem to stay in sync. I can run ntpdate manually, but I thought that I should have an ntpd running that would automate that. I did check with apt and apt-cache but don't find any ntpd (or associated ntpq), not any such names in my system (locate...), but ntp-doc does still describe them. Looking around I see that there is an ntpdate-debian command, and it uses /etc/default/ntpdate for servers (instead of the standard /etc/ntp.conf), but even thought that file is there and has "yes" indicated to use ntp.conf, it fails with "no servers can be used", although ntpdate works fine. Is this just a layer over ntpdate, any reason to use it instead? So, why are they missing, do I need them, how do I automate time updates? Associated, two of my machines are virtualized on a MSoft VM, how is it that their clocks drift, and both to different values? (The underlying Windows machine clock seems stable). I see a few old notes about time & ntp problems on VMware, didn't find anything either current or relating to MSoft VMs. Anything I did see says just to use ntpd, but as above, ...?!

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• using pf for packet filtering and ipfw's dummynet for bandwidth limiting at the same time

  - by krdx

  I would like to ask if it's fine to use pf for all packet filtering (including using altq for traffic shaping) and ipfw's dummynet for bandwidth limiting certain IPs or subnets at the same time. I am using FreeBSD 10 and I couldn't find a definitive answer to this. Googling returns such results as: It works It doesn't work Might work but it's not stable and not recommended It can work as long as you load the kernel modules in the right order It used to work but with recent FreeBSD versions it doesn't You can make it work provided you use a patch from pfsense Then there's a mention that this patch might had been merged back to FreeBSD, but I can't find it. One certain thing is that pfsense uses both firewalls simultaneously so the question is, is it possible with stock FreeBSD 10 (and where to obtain the patch if it's still necessary). For reference here's a sample of what I have for now and how I load things /etc/rc.conf ifconfig_vtnet0="inet 80.224.45.100 netmask 255.255.255.0 -rxcsum -txcsum" ifconfig_vtnet1="inet 10.20.20.1 netmask 255.255.255.0 -rxcsum -txcsum" defaultrouter="80.224.45.1" gateway_enable="YES" firewall_enable="YES" firewall_script="/etc/ipfw.rules" pf_enable="YES" pf_rules="/etc/pf.conf" /etc/pf.conf WAN1="vtnet0" LAN1="vtnet1" set skip on lo0 set block-policy return scrub on $WAN1 all fragment reassemble scrub on $LAN1 all fragment reassemble altq on $WAN1 hfsc bandwidth 30Mb queue { q_ssh, q_default } queue q_ssh bandwidth 10% priority 2 hfsc (upperlimit 99%) queue q_default bandwidth 90% priority 1 hfsc (default upperlimit 99%) nat on $WAN1 from $LAN1:network to any -> ($WAN1) block in all block out all antispoof quick for $WAN1 antispoof quick for $LAN1 pass in on $WAN1 inet proto icmp from any to $WAN1 keep state pass in on $WAN1 proto tcp from any to $WAN1 port www pass in on $WAN1 proto tcp from any to $WAN1 port ssh pass out quick on $WAN1 proto tcp from $WAN1 to any port ssh queue q_ssh keep state pass out on $WAN1 keep state pass in on $LAN1 from $LAN1:network to any keep state /etc/ipfw.rules ipfw -q -f flush ipfw -q add 65534 allow all from any to any ipfw -q pipe 1 config bw 2048KBit/s ipfw -q pipe 2 config bw 2048KBit/s ipfw -q add pipe 1 ip from any to 10.20.20.4 via vtnet1 out ipfw -q add pipe 2 ip from 10.20.20.4 to any via vtnet1 in

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• How to direct reverse proxy requests using wildcard vhosts

  - by HonoredMule

  I'm interested in running a reverse proxy with 2-3 virtual machines behind it. Each internal server will run multiple virtual hosts, and rather than manually configuring each individual vhost on the proxy (a variety of vhosts come and go too often for this to be practical), I would like to use something which can employ pattern matching in a sequential order to find the appropriate back-end server. For example: Server 1: *.dev.mysite.com Server 2: *.stage.mysite.com Server 3: *.mysite.com, dev.mysite.com, stage.mysite.com, mysite.com Server 4: * In the above configuration, task.dev.mysite.com would go to Server 1, dev.mysite.com would go to Server 3, yoursite.stage.mysite.com to Server 2, www.mysite.com to Server 3, and yoursite.com to Server 4. I've looked into using Squid, Varnish, and nginx so far. I have my opinions regarding their respective desirability and general suitability, but it's not readily apparent if any of them can handle dynamic server selection in this manner and not require per-vhost configuration. Apache on the other hand can do this handily and simply, but otherwise (aside from being well-known and familiar) seems very poorly suited to the partly-performance-serving task. Performance isn't actually a major concern yet, but it seems foolish to use Apache if another system will perform far better and can also handle the desired 'hands-free' configuration. But so is frequently having to adjust the gateway for all production services and risk network-wide outage...and so also is setting oneself up for longer downtime later if Apache becomes a too-small bottleneck. Which of these (or other) reverse proxies can do it/would do it best? And maybe I should post this as a separate question, but if Apache is the only practical option, how safe/reliable/predictable is apache-mpm-event in apache2.2 (Ubuntu 12.04.1) particularly for a dedicated reverse proxy? As I understand it the Event MPM was declared "safe" as of 2.4 but it's unclear whether reaching stability in 2.4 has any implications for the older (2.2) versions available in official/stable package channels of various distros.

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