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• SQL Server 2008 R2 transactional replication over VPN

  - by enashnash

  I'm having difficulty setting up replication over a VPN. I have a SQL Server 2008 R2, Enterprise Edition database on a Windows 2008 R2 Server. SQL Server is running on a non-standard port. I have set it up so that it is acting as its own distributor and have configured a publisher on this server. It is set as an updatable transational publication (yes, this is necessary). On this server, I have Routing and Remote Access enabled in order to be able to establish VPN connections. It is configured with a static IP address pool, of which the first in the range is always assigned to the server. I have assigned a test user a static address within this range (I don't know if this is necessary or not). All clients will be 2008 R2 versions, but could be SQL Express or standalone developer instances of the full product. I can establish a VPN connection from the client without problems and can see that the correct IP addresses are allocated. After connecting to the database to test that I can establish a connection, I realised that I needed to be able to connect to the database using the server name rather than an IP address - required for replication - which wouldn't work initially. I created an entry in the hosts file for the server on the client using the NETBIOS name of the server, and now I can connect to the server, from the client, using the SERVER\INSTANCE, PORT syntax, over the VPN. As it is the default instance on the server, I can also connect with simply SERVER, PORT syntax. After all that, I still get the following dreaded error: SQL Server replication requires the actual server name to make a connection to the server. Connections through a server alias, IP address, or any other alternate name are not supported. Specify the actual server name, 'SERVER\INSTANCE'. (Replication.Utilities). What have I missed? How do I get this to work? TIA

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• remote telnet and email

  - by Mustafa Ismail Mustafa

  This issue has been occupying my work for the last few days and I will be understating when I say its driven me up the blasted walls. Essentially, I can ping and tracert the domain jnrcs.org and the subdomains mail.jnrcs.org and mail.jordanredcrescent.org. All three mentioned point to ip address 212.38.147.97. About 4 days ago, when we registered the domain "jnrcs.org" suddenly all external connection to the mail server from outside was lost. Not just mail, but other http based port-forwarded or natted services (such as camera surveillance and pbx services). I tried good old telnet (I'm a linux user) and I get the following output: telnet> o mail.jnrcs.org 25 Trying 212.38.147.97... telnet: Unable to connect to remote host: No route to host telnet> Tracert gives me: traceroute to mail.jnrcs.org (212.38.147.97), 30 hops max, 60 byte packets 1 192.168.1.2 (192.168.1.2) 0.869 ms 0.944 ms * 2 * * * 3 * * * 4 * * * 5 * * * 6 * 212.38.128.118 (212.38.128.118) 33.875 ms 39.187 ms 7 * * * 8 * * * 9 * * * 10 * * * 11 * * 212.38.147.97 (212.38.147.97) 67.621 ms I am stumped. Other friends from all around the world can telnet no problem. What could have possibly happened to make telnet/smtp/pop/imap/http access stop? Please bear in mind I'm primarily a developer but I [am under the delusion] that I can carry my weight in IT administration :) TIA

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• Tomato OS: "memory exhausted" running vi .... how to solve?

  - by Sam Jones

  I have set up tomato (shibby) on an asus RT-N66U router. It works great. I loaded up a few pieces, like transmission and optware. I can run vi, but when I run vi it fails with a "memory exhausted" error, and the terminal session hangs. For reference: If I simply start "vi" it runs fine. But if I specify vi I get the memory exhausted error, even if the file I am opening is just a couple of hundred bytes in size (like fstab). I discovered that my swap partition was not properly set up, so I did that. The swapon command now indicates I really do have a swap: [root@MyRouter samba]$ swapon -s Filename Type Size Used Priority /dev/sda1 partition 32900860 0 1 How can I get vi to work? Thanks! System setup reference information: asus RT-N66U router 2TB usb hard drive partitions on hard drive: Disk /dev/sda: 2000.4 GB, 2000398839808 bytes 255 heads, 63 sectors/track, 30400 cylinders Units = cylinders of 16065 * 4096 = 65802240 bytes Disk identifier: 0xfacbc8ab Device Boot Start End Blocks Id System /dev/sda1 1 512 32900868 82 Linux swap / Solaris /dev/sda2 513 29000 1830638880 83 Linux running samba memory: $ cat /proc/meminfo MemTotal: 255840 kB MemFree: 210980 kB Buffers: 5264 kB Cached: 22768 kB SwapCached: 0 kB Active: 20272 kB Inactive: 11448 kB HighTotal: 131072 kB HighFree: 99868 kB LowTotal: 124768 kB LowFree: 111112 kB SwapTotal: 32900860 kB SwapFree: 32900860 kB Dirty: 0 kB Writeback: 0 kB TIA!

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• Print jobs sent to server OK, but then get deleted

  - by Paul Morrison

  I have 2 HP computers, one running Win XP SP3, one running Win7. I have a Lexmark X4270 All-in-One printer attached to the Win7 machine via a USB port. I can print OK from the Win 7 machine, but when I print from the WinXP machine, the print job shows up in both print queues (showing the same number of bytes - which is good!), but then the status gets changed to "Deleting - Sent to printer", and that status shows up in both print queues. The print job then stays there until I do a cancel, followed by a system restart. FWIW the owner is shown as Guest, but I have permission for Everyone set to print... I believe I have up-to-date drivers; I don't believe it's a firewall problem. What I would like to see is the Win7 machine's reason for deleting my print jobs - is there a diagnostic tool available? Also, I notice that the port for this printer on the WinXP machine is set to USB001 - I would have thought something like \servername\sharedprinter would be more appropriate - and I can see that in the list of ports, but the system doesn't let me change the port name from USB001... Could someone shed some light? I have spent hours on this! TIA BTW I can do file sharing, no problem!

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• New keyboard for linux: Adesso Tru-Form or MS Natural Keyboard 4000?

  - by Andrea

  Hi folks! I'm going to buy a new ergonomic keyboard for my laptop. In the following, keep in mind I live in Italy. I considered the following models: Adesso PCK-308UB - Adesso Tru-Form™ Pro - Contoured Ergonomic Keyboard with TouchPad-PS2 Pro: has a built-in touchpad in the same position of my laptop somewhat cheaper than the alternative below Cons: the surface doesn't seem to be bowl-shaped. keys seem to lay on a straight slightly-inclined surface. It seems an idea used extensively in other ergonomic keyboards according to a few comments on the net, new Adesso keyboards seem to lack robustness, they're likely to loose small parts after a few weeks or months. Other users, instead, seem to never had any problem in years and swear by their quality and comfortability. Those who had problems, however, lamented a lack of responsiveness from the manufacturer. I'm not sure whether the keyboard, at least the standard keys, and the touchpad will both be recognized correctly under linux distros (I mostly use FC btw) last time I checked, Adesso didn't have local resellers in my country Microsoft Natural Ergonomic Keyboard Pro: recognized as one of the most comfortable keyboards reliable customer service operating in my country AFAIK there are several documented ways to get extra buttons work with linux Cons: it doesn't have a builtin touchpad and has a numeric keypad wasting space to reach mouse But there could be other keyboards I haven't considered yet, so here follows my ideal keyboard wishlist, ordered by priority linux compatible basic ergonomic design, which entails split tilted keyboard and pads advanced ergonomic design, like true-ergonomic's or kinesis , where special keys (like enter, caps-lock...) are placed symmetrically in the middle to be used by thumbs a builtin touchpad/trackball placed under the keyboard. I just love this on my notebook. I think it's pretty effective, since it allows my hand to rest naturally everytime I use it. Any opinion on this? high-quality switches, like cherry's (unsure about this one) additional programmable keys placed near usual ones, to simplify typing shortcuts TIA Andrea

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• Solaris SMF to Upstart on RHEL6

  - by aaa90210

  I am planning a migration from Solaris/x86 to RHEL6. Part of this migration will be migrating services from SMF to the RHEL6 equivalent, which appears to be upstart. While init.d scripts still seem to be supported, I want to take advantage of a more sophisticated init daemon, especially for features like job supervision (restarting etc). I would like to gather some thoughts on a few points: 1) Is upstart an adequate job supervisor, i.e. does it preclude the need for stand-alone managers like daemontools/supervise? 2) Upstart scripts seem very bare-bones compared to a typical init.d script. If I was porting an init.d script to Upstart, is it OK to just "exec /etc/init.d/myjob start"? This include RHEL installed programs like httpd. 3) Does upstart do anything is regards to pid files, and what are it's expectations in regards to the forking model of the process? 4) Are there any straightforward guides to the process management aspect of Upstart...and by that I mean the conditions around controlling restarting? e.g. how many times to restart the process before it goes into a maintenance state, or to ignore errors/core dumps in child processes of the supervised process. Any other relevant ideas or guides would be appreciated. TIA

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• Mac Security - Which one?

  - by Bob Rivers

  Hi, Recently I had my credit card cloned. A few hours after shopping at an online store (in which I trust and buy since 2006) I received a call from my bank asking if I recognize a $5,000 debt to a store(?!) called Church of Christ... I'm a Mac user (OS X 10.6.3). I always kept my system updated and I have firewall enabled (in my Mac and in my broadband router), but I decided to adopt some kind of protection. I don't want to rise passionate discussions. Real or not, snake oil or not, I need to have back my peace of mind... I read this and this posts. I selected two software that I think that could help me (both have more features other than just an antivirus). Does someone have feedback about Intego's VirusBarrier X6 or Trendmicro's Smart Surfing? Intego solutions seems to be better, but TrendMicro brand/name is stronger in corporate environment, so their solution should be good. Both solutions have 30 day free trial, but I would like to hear something from you. Any other solution that I should look? TIA, Bob

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• Reconfiguring, then deleting obsolete pagefile.sys from C: in one go using a batch script

  - by DanielSmedegaardBuus

  I'm trying to set up an automated script for a Windows XP installer. It's a batch script that runs on first boot after installation, and among the things I'm trying to accomplish, is removing the pagefile from C: entirely, and putting a 16-768 MB pagefile on D: instead. Here're my batch file instructions: echo === Creating new page file on D: ... cscript %windir%\system32\pagefileconfig.vbs /create /i 16 /m 768 /vo d: >nul echo. echo === Removing old page file from C: ... cscript %windir%\system32\pagefileconfig.vbs /delete /vo C: attrib -s -h c:\pagefile.sys del c:\pagefile.sys My problem is that while these are sane commands, the removal of the pagefile on C: requires me to reboot before those commands succeed.b Or, in other words — I have to first create the D: pagefile, then reboot and delete the c:\pagefile.sys file, or I'm stuck with a c:\pagefile.sys file which isn't even recognized by Windows itself (it'll just say that there's a page file on D:, and that C: has no pagefile at all). Obviously because already some pages are written to the C:\pagefile.sys file. So how would I go about accomplishing this in one go? Or, in two gos, if this is "batch scriptable" :) TIA, Daniel :) EDIT: I should probably clarify: Running those commands above are all valid, but they'll only succeed fully if I re-run the "attrib" and "del" commands at next boot. The C: pagefile is in use at the time, so I cannot delete the file it uses, and Windows itself won't remove it when I configure it to not use C: as a page file drive. Instead, it'll leave an orphaned c:\pagefile.sys file behind (which is really large). I don't necessarily need this to work in one go, registering the last two commands to run after a reboot would also be great :)

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• adding or routing additional domain email addresses

  - by Mustafa Ismail Mustafa

  We have exchange 2007 and we bought a new domain name and we're still keeping the old one so that we can wean everyone off of the old emails. Now, I'm wondering how to go about this. I need to add the new domain as accepted and authoritative by the exchange server. Emails on the new domain need to get routed to the inbox and ditto the old emails, however, I want to be able to change the reply-to in the header to the new email address automatically. I also want to set the new email addresses as the defaults. Ideally, I'd like to be able to add a message at the bottom of every externally outgoing email saying that the new email is [email protected]. But this is a nice to have, certainly not a must have. I've added the new domain as authoritative, and managed to change the primary smtp email addresses to the new one, but sent emails are not being routed to them and neither are the old email addresses! Now how the heck would I go about fixing all of that? I'm completely stumped! TIA

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• Outlook Shared Address book and contact not displaying

  - by user224061

  We have a shared Exchange addressbook with distribution email groups. When someone connects to the shared addressbook, composes an email to a group, the email distribution list is empty, then the distribution list is expanded. In troubleshooting, I noticed that when we expand the distribution list to view the recipients, most of the recipients are missing and only semicolons appear. CLICK HERE FOR IMAGE Further troubleshooting, I notice that when I open the distribution list with my Outlook client and click on the Update Now icon, and then go to create the email then when I expand the group the email addresses now appear. CLICK HERE FOR IMAGE Now, my Outlook profile is a cached profile. The shared contact list that I pulled the distribution list from is an online/non-cached shared contact list. What I also found is that if I switched my Outlook client to be online only(not cached) the share address book lists appear properly when expanded. Is there any way to make this list appear correctly without having to click on update now for each and every distribution list in the shared contacts list we have on the server? I would really prefer that every time one wants to use this shared contact list, they do not have o click the update not button or switch from cached mode to make this work. T.I.A

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• Hard Drive benchmark values show write very very slow

  - by John

  I recently started to have issues with my laptop being very slow. I ran a hard drive benchmarking tool (by ATTO) that showed that the write speed was very very slow on my boot drive. I ran the same benchmark on my usb drive and it was 650 times faster than my boot drive when it came to writing. Reading is very fast/normal on both. I swapped out an identical drive and ran the same benchmark. This time the drive showed proper write speed. Thinking that I had a hard drive going bad I cloned the old one onto the new one. I managed to clone the problem too. Anyone have any ideas on what in WinXP SP3 might be causing the write issues? I am on a corporate network and we have commercial anti-virus software installed. (AVG I think) I regularly run defraggler and have about 40 gig free on a 100 gig drive. The machine has 4 gigs of memory. Any ideas? TIA J

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• Why do most songs in my media collection play twice? - Corrupt media?

  - by Dean

  Problem: Whether I'm playing the media with Rhythmbox on Ubuntu, Winamp on Windows, or my Nokia N95's media player, most of my audio files (OK, maybe only 40%) play twice. Info: I have a 500GB external 2.5" WD HDD, with a 150GB primary FAT32 partition labeled MUSIC. Inside this, I have about 500 folders containing about 10,000 MP3/WMA/M4A/WAV files. I manage the drive using Ubuntu 9.10, and frequently copy data to/from it using RSYNC, or on windows, TotalCopy. The visual output is different in each media player, but it behaves as if the 1 MP3 has the same song on it twice, and as soon as it ends it begins again. Winamp shows that the song goes for 2x as long as it should, The N95's media player shows the progress bar off the right-hand-side of the screen when it begins playing (then jumps back to the left, then continues along...). Rhythmbox doesn't show me how long the song is, nor does the progress bar move along the screen. Plea: It seams to me somewhere along the lines my collection has become corrupt... but where? And how? and please someone tell me I can fix it!! TIA, Dean.

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• Apache: rewrite port 80 and 443 - multiple SSL vhosts setup

  - by Benjamin Jung

  SETUP: multiple SSL domains are configured on a single IP, by using vhosts with different port numbers (on which Apache listens) Apache 2.2.8 on Windows 2003 (no comments on this pls) too many Windows XP users so SNI isn't an option yet There may be reasons why it's wrong to use this approach, but it works for now. vhosts setup: # secure domain 1 <VirtualHost IP:443> SSL stuff specifying certificate etc. ServerName domain1.org </VirtualHost> # secure domain 2 <VirtualHost IP:81> SSL stuff for domain2.org ServerName domain2.org </VirtualHost> GOAL: Some folders inside the domain2.org docroot need to be secure. I used a .htaccess file to rewrite the URL to https on port 81: RewriteEngine On RewriteCond %{SERVER_PORT} !^81$ RewriteRule (.*) https://%{HTTP_HOST}:81%{REQUEST_URI} [R] Suppose I put the .htaccess in the folder 'secfolder'. When accessing http://domain2.org/secfolder this gets succesfully rewritten to https://domain2.org:81/secfolder. ISSUE: When accessing https://domain2.org/secfolder (without port 81), the certificate from the first vhost (domain1.org) is used and the browser complains that the site is insecure because the certificate is not valid for domain2.org. I thought that RewriteCond %{SERVER_PORT} !^81$ would also rewrite https://domain2.org to https://domain2.org:81, but it doesn't. It seems that the .htaccess file is not being used at all in this case. At this point I am not sure how to apply a RewriteRule to https://domain2.org. I tried creating an additional vhost for domain2 on port 443 before the one for domain1.org, but Apache seems to choke on that. I hope someone of you has an idea how to approach this. TIA.

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• Win2008/IIS7/fx2.0 - 500.19 error

  - by Keith Barrows

  I installed new boxes at the beginning of the week. 1) Web Server on Win2008 x64, IIS 7 + all updates 2) DB Server on Win2008 x64, SQL 2008 Ent + all updates I configured my websites, set up host headers and DNS entries, worked through some problems on my handlers and finally got it all running Wednesday morning. Our team has been using it since then. This morning I came in and everyone of us is getting a 500 error. Error Summary HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid. Detailed Error Information Module IIS Web Core Notification Unknown Handler Not yet determined Error Code 0x80070005 Config Error Cannot read configuration file due to insufficient permissions Config File \?\C:\RivWorks\dev\web.config Requested URL http://dev.rivworks.com:80/login.aspx Physical Path Logon Method Not yet determined Logon User Not yet determined Config Source -1: 0: Links and More InformationThis error occurs when there is a problem reading the configuration file for the Web server or Web application. In some cases, the event logs may contain more information about what caused this error. I’ve gone through the KB articles, made sure IIS_IUSRS had read permissions and am now stumped. What bothers me is IIS is looking in \?\C:\ instead of just C:. What is happening? TIA

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• Sending Mail from Web App to Google Apps won't work - internal routing? VPS

  - by Charlino

  I've got a web application, www.mysuperwebapp.com, which sends out emails for various reasons - the contact us page is a good example. I am using google apps on the domain and I've setup a google apps group, Support ([email protected]), which I want the emails from the contact us page to go to. But the emails don't seem to be sending... I thought it could be that the groups security is a little tighter than normal email, so I change the contact us email to go to [email protected] - but they still didn't appear. So I'm guessing that it has something to do with internal routing and the messages aren't leaving the server/network at all. Eg Sending an email from the mysuperwebapp.com computer to a mysuperwebapp.com email address. I put an entry into the hosts file for 123.123.123.123 mysuperwebapp.com but that doesn't seem to have helped. Also, there doesn't seem to be anything of interest in the event log. What do I need to do? Or what do I need to get my VPS hoster to do? TIA, Charles Ps. The VPS is a Windows 2008 box with IIS7 and the default SMTP (IIS6?) server. The web app is ASP.NET MVC - not that that should matter.

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• Program for remove exact duplicate files while caching search results

  - by John Thomas

  We need a Windows 7 program to remove/check the duplicates but our situation is somewhat different than the standard one for which there are enough programs. We have a fairly large static archive (collection) of photos spread on several disks. Let's call them Disk A..M. We have also some disks (let's call them Disk 1..9) which contain some duplicates which are to be found on disks A..M. We want to add to our collection new disks (N, O, P... aso.) which will contain the photos from disks 1..9 but, of course, we don't want to have any photos two (or more) times. Of course, theoretically, the task can be solved with a regular file duplicate remover but the time needed will be very big. Ideally, AFAIS now, the real solution would be a program which will scan the disks A..M, store the file sizes/hashes of the photos in an indexed database/file(s) and will check the new disks (1..9) against this database. However I have hard time to find such a program (if exists). Other things to note: we consider that the Disks A..M (the collection) doesn't have any duplicates on them the file names might be changed we aren't interested in approximated (fuzzy) comparison which can be found in some photo comparing programs. We hunt for exact duplicate files. we aren't afraid of command line. :-) we need to work on Win7/XP we prefer (of course) to be freeware TIA for any suggestions, John Th.

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• Port Forwarding failing only to Ubuntu servers from Draytek router

  - by Rufinus

  I know this is a kinda unusal question, but Draytek support (..which is very eager to solve the issue) seems to reach its limits. Scenario: Draytek Vigor Multiwan router with current firmware. Multiple WAN IP Aliases on one of the wan ports DMZ (or port forwarding doesnt matter) from wan ip alias to internal host currently i have two internal hosts: 192.168.0.51 (Ubuntu) 192.168.0.53 (Debian) both should be accessible from outside via one of the wan ip aliases. both are accessible with their internal ip's at all times (!) If the router gots restartet, both external ips are forwarding to its internal hosts. But after a few minutes up to 2 hours, the ubuntu host is no longer reachable via its external interface. The debian hosts on the other hand is reachable. In what does ubuntu differs from debian ? I know at least of one user with the exact same problem. see http://ubuntuforums.org/showthread.php?p=10994279 Any ideas ? TIA EDIT: via ping diagnostics directly on vigor, 192.168.0.53 is pingable, 192.168.0.51 is not. but both hosts are perfectly reachable from anywhere inside the network. if i restart ubuntu networking it works again for a short time.... i'm out of ideas.. EDIT 2: after further investigation, i noticed a ping from .51 to the network (or a host in the internet) is enough to make the port-forwarding working again. So i will add an Cronjob as a "keep-alive" ping. This will solve the problem, but the reason for this behaivor is still in the dark. Thanks to all commentors.

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• split virtualization design based on environment or server role?

  - by Dan

  I'm setting up the server environment for a new software development group, which will include 4 test environments. These are web applications, so each environment will have an application server and a database server. I'm planning on buying two physical servers (e.g. 6-core CPU each with 12GB or so of RAM), and I'm thinking virtualization is appropriate here. With that in mind, I've thought of a couple ways that I could organize the virtualization strategy: - Separated by server role: Server 1 has all the application servers, each in their own guest VM. Server 2 has all the databases. OR - Separated by environment: Server 1 has a VM for two of the environments, with the VM containing both the app server and the database server. Server 2 would also contain two test environments, with the same style (app server and database in same VM). The advantages I see with all the app servers on one server and all the databases on another server is that I could probably be more efficient with the database server (one instance running multiple databases). But the other option seems easier to manage (archives/restorations would be contained in a single VM). Any recommendations? TIA.

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• Cutting Ubuntu to the bone for Virtualbox VM

  - by user32853

  I've been looking around for a Linux variant which will install only the software I need rather than everything Ubuntu (for example) puts in by default. This is to create a virtual machine in Virtualbox which has bash, apache, python, perl, SQLite, openssh and a few other programs but nothing else. I'd prefer to go with Ubuntu if possible but another modern distro would do as well (I like using apt-get and yum rather than downloading/compiling etc). So far, I've tried: SuseStudio.com, which is probably the best so far. Pressing F4 to get the boot options on Ubuntu 9.10, but there is no minimal installation (I think there was once). Arch Linux, slightly confusing install procedure but I might go back and try again. Gentoo, started well but fairly soon the HD on the virtual machine went to 2Gb, even before the installation had started in earnest (I'd partitioned the disks is all). I realise there are various "small" Linuxes around like Puppy, Feather, DSL, etc, but they seem to be aimed at desktop users or as a techie's toolkit, and I want a small-as-possible server distro which can be managed with tools like apt or yum or similar. TIA for any advice you can offer! -- Monty

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• New SSD, is the MBR broken? DISK BOOT FAILURE

  - by Shevek

  I've been running Windows 7 on a WD 500gb SATA single drive, single partition setup for some time with no issues. I've just installed a new Kingston V Series 64gb SSD and performed a clean install of Win7 to it, deleting the partitions on the 500gb and using that as a data drive. All was well for a few reboots but then I started to get "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER" messages. If I put the Win7 install DVD back in the drive it boots fine. Tried a clean install again, after replacing SATA cables and swapping SATA ports, with a complete partition wipe of both drives. Again, rebooted fine a few times then back with the "DISK BOOT FAILURE" error. Looked on the web and found some discussions about it so I then started from scratch again. This time I wiped the MBR on both drives using MBRWork, disconnected the 500gb and reinstalled to the SSD. Removed the install DVD and installed all the drivers which involved many reboots, all with no problem. To make sure I also did a few cold boots as well. Reconnected the 500gb, initialised, partitioned and formatted it. Copied data to it and did some more reboots and shutdowns. All was ok. Then out of the blue comes another "DISK BOOT FAILURE" and again, if the Win7 install DVD is in the drive it boots fine. So, is the SSD a bad'un? TIA UPDATE: It was a BIOS issue! I found a hidden away option for HDD boot order, which was separate from the usual HDD/CDRom/FDD boot order option. The WD was set to boot before the SSD... Swapped them round and all is well. Still don't understand how it worked at first though... Thanks Solaris

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• memory tuning with rails/unicorn running on ubuntu

  - by user970193

  I am running unicorn on Ubuntu 11, Rails 3.0, and Ruby 1.8.7. It is an 8 core ec2 box, and I am running 15 workers. CPU never seems to get pinned, and I seem to be handling requests pretty nicely. My question concerns memory usage, and what concerns I should have with what I am seeing. (if any) Here is the scenario: Under constant load (about 15 reqs/sec coming in from nginx), over the course of an hour, each server in the 3 server cluster loses about 100MB / hour. This is a linear slope for about 6 hours, then it appears to level out, but still maybe appear to lose about 10MB/hour. If I drop my page caches using the linux command echo 1 /proc/sys/vm/drop_caches, the available free memory shoots back up to what it was when I started the unicorns, and the memory loss pattern begins again over the hours. Before: total used free shared buffers cached Mem: 7130244 5005376 2124868 0 113628 422856 -/+ buffers/cache: 4468892 2661352 Swap: 33554428 0 33554428 After: total used free shared buffers cached Mem: 7130244 4467144 2663100 0 228 11172 -/+ buffers/cache: 4455744 2674500 Swap: 33554428 0 33554428 My Ruby code does use memoizations and I'm assuming Ruby/Rails/Unicorn is keeping its own caches... what I'm wondering is should I be worried about this behaviour? FWIW, my Unicorn config: worker_processes 15 listen "#{CAPISTRANO_ROOT}/shared/pids/unicorn_socket", :backlog = 1024 listen 8080, :tcp_nopush = true timeout 180 pid "#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid" GC.respond_to?(:copy_on_write_friendly=) and GC.copy_on_write_friendly = true before_fork do |server, worker| STDERR.puts "XXXXXXXXXXXXXXXXXXX BEFORE FORK" print_gemfile_location defined?(ActiveRecord::Base) and ActiveRecord::Base.connection.disconnect! defined?(Resque) and Resque.redis.client.disconnect old_pid = "#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid.oldbin" if File.exists?(old_pid) && server.pid != old_pid begin Process.kill("QUIT", File.read(old_pid).to_i) rescue Errno::ENOENT, Errno::ESRCH # already killed end end File.open("#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid.ok", "w"){|f| f.print($$.to_s)} end after_fork do |server, worker| defined?(ActiveRecord::Base) and ActiveRecord::Base.establish_connection defined?(Resque) and Resque.redis.client.connect end Is there a need to experiment enforcing more stringent garbage collection using OobGC (http://unicorn.bogomips.org/Unicorn/OobGC.html)? Or is this just normal behaviour, and when/as the system needs more memory, it will empty the caches by itself, without me manually running that cache command? Basically, is this normal, expected behaviour? tia

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• What can cause a kernel hang on redhat 4?

  - by Ivan Buttinoni

  I've to solve a nasty problem on a ten machine "cluster": randomly one of these machine hang during an hard computation, sometime still ping sometime not. The problem was described me at the phone, I've still no touch/see these machine, so I can't be more precise. It seem there's no (real) keyboard or monitor linked to them, so I haven't nothing about keyboard led or messages on monitor. Don't worry, what I really need is some suggestion where to search the problem, some suggestions on what can cause a kernel hang on a working machine. I also see this post, but seem same need on a different situation. My ideas since now: - HW problem (ram, cpu, fan etc.) - bad autofs configuration - bad nfs(?) configuration - presence of a trojan/hacker/etc - /dev/"swap" linked to /dev/zero - kernel out of memory(??) - kernel bugged In other words I try to imagine what kind of envent can occour that can crash the kernel insted of the application that generate the event. What hang have YOU experienced before? Write it to me! TIA

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• VMware Workstation "Power off" and "Suspend" buttons are disabled. What is going on?

  - by Ed Norris

  I've been using an XP image for a few months now with no problems. Recently the power off and resume buttons were disabled and I'm not sure what happened to cause that. In addition, the menu items to do those functions are grayed out (like VM | Power | Power Off) I'm using VMware Workstation 6.5.3 on a Windows 7 64-bit host. The image is Windows XP 32-bit. There is plenty of free space and memory on the host and the CPU is not pegged. I am able to power off the image through its Start menu, but that's a workaround not a fix. Any suggestions? TIA EDIT: Well after manually shutting down the image then closing and reopening the image file (which I've done before) in preparation for reinstalling the tools as suggested below, it looks fine. The power off and suspend buttons are enabled and work. So what do I do with this question now? "Close and restart a few times and it may work" doesn't seem useful...

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• Juniper SSG20 IP settings for email server

  - by codemonkie

  We have 5 usable external static IP addresses leased by our ISP: .49 to .53, where .49 is assigned to the Juniper SSG20 firewall and NATed for 172.16.10.0/24 .50 is assigned to a windows box for web server and domain controller .51 is assigned to another windows box with exchange server (domain: mycompany1.com) mx record is pointing to 20x.xx.xxx.51 Currently there is a policy set for all SMTP incoming traffic addressed to .51 forward to the NATed address of the exchange server box (private IP: 172.16.10.194). We can send and receive emails for both internal and external, but the gmail is saying mails from mycomany1.com is not sent from the same IP as the mx lookup however is from 20x.xx.xxx.49: Received-SPF: neutral (google.com: 20x.xx.xxx.49 is neither permitted nor denied by best guess record for domain of [email protected]) client-ip=20x.xx.xxx.49; Authentication-Results: mx.google.com; spf=neutral (google.com: 20x.xx.xxx.49 is neither permitted nor denied by best guess record for domain of [email protected]) [email protected] and the mx record in global dns space as well as in the domain controller .50 for mail.mycompany1.com is set to 20x.xx.xxx.51 My attempt to resolve the above issue is to Update the mx record from 20x.xx.xxx.51 to 20x.xx.xxx.49 Create a new VIP for SMTP traffic addressed to 20x.xx.xxx.49 to forward to 172.16.10.194 After my changes incoming email stopped working, I believe it has something to do with the Juniper setting that SMTP addressed to .49 is not forwarded to 172.16.10.194 Also, I have been wondering is it mandatory to assign an external static IP address to the Juniper firewall? Any helps appreciated. TIA

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• Mysqld shutting down by itself

  - by AJ Naidas

  I'm running a Wordpress Blog that gets medium-high traffic. It is hosted in an Ubuntu Server 2GB Memory 2 Core Processor 40GB SSD Disk, 3TB Transfer. The problem is that MySQL shuts down by itself after an hour or two. I had to restart mysql each and every time this happens. I checked the logs and this is what I found: 140612 6:48:14 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead. 140612 6:48:14 [Note] Plugin 'FEDERATED' is disabled. 140612 6:48:14 InnoDB: The InnoDB memory heap is disabled 140612 6:48:14 InnoDB: Mutexes and rw_locks use GCC atomic builtins 140612 6:48:14 InnoDB: Compressed tables use zlib 1.2.3.4 140612 6:48:14 InnoDB: Initializing buffer pool, size = 1.4G InnoDB: mmap(1502412800 bytes) failed; errno 12 140612 6:48:14 InnoDB: Completed initialization of buffer pool 140612 6:48:14 InnoDB: Fatal error: cannot allocate memory for the buffer pool 140612 6:48:14 [ERROR] Plugin 'InnoDB' init function returned error. 140612 6:48:14 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 140612 6:48:14 [ERROR] Unknown/unsupported storage engine: InnoDB 140612 6:48:14 [ERROR] Aborting 140612 6:48:14 [Note] /usr/sbin/mysqld: Shutdown complete judging by this line: 140612 6:48:14 InnoDB: Fatal error: cannot allocate memory for the buffer pool I suspect that this is a memory problem, but I would like to hear from the experts here before I conclude. Is this a lack of memory problem? Do you think the value of max_connections in my.cnf (currently 100) is a potential cause and needs increasing? TIA.

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