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• SQL cluster instance names for large project

  - by Sam

  We're setting up two clusters. One dev and one prod. The Production will host two SQL instances - a OLTP and a DW. The development will host 4 OLTP non-production environments and at least one DW non-production. We're working on getting more DW non-prods and possibly more OLTP systems. I'm considering a naming scheme like this, where PROJ would be 3 initials for the project name. Dev Cluster MSSQLPROJD1\D1 (DEV) MSSQLPROJD2\D2 (TEST) MSSQLPROJD3\D3 (QA) MSSQLPROJD4\D4 (STAGE) MSSQLPROJD5\D5 (DW) Prd Cluster MSSQLPROJP1\P1 (PRD) MSSQLPROJP2\P2 (DW) To the left of the slash, each name must be unique network wide. On each server, the instance name, to the right of the slash, must be unique. Any thoughts on this? I'm trying to avoid having instance names drifting from reality as the project progresses - say we change what we call a certain environment or want to repurpose one. Then we can update a listing of the purposes for the instances and be done with it. How has a scheme like this worked out for you? Maybe you do things another way in your shop - tell me about it. Thanks.

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• Looking for a "light" compositing manager for GNOME

  - by detly

  I have an HP Pavilion DM3 (graphics is nVidia GeForce G105M), running Debian Squeeze with GNOME 2.30. My preference for DE is Gnome + Metacity + Nautilus. I'd like to use Docky, but it requires compositing. So I'm looking for a relatively "light" compositing manager. I realise that "light" is ambiguous, but I basically want something that won't chew through my notebook's batteries because of CPU or GPU usage. I know that Metacity is capable of compositing, but as far as I'm aware it's still testing. Some people report that it's smooth and lightweight, others claim that it eats up processor time. I've also seen references to a problem with nVidia, but no actual details. I'm not averse to Compiz, but I haven't used it before and I don't know what to expect in terms of "weight." And maybe there's something else I haven't heard of. So can anyone recommend anything? Or dispel my idea that Metacity is not the right tool for the job? (Originally posted on GNOME forums.)

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• Problems installing GIT on Ubuntu through SSH

  - by jamadri

  I'm having trouble installing git using this command: sudo apt-get install git-core It's giving me the problems below and I'm not quite sure how to get this to work correctly. I try running sudo apt-get update and after it just gives me problems. If anyone knows how to solve this or a possible way of getting GIT on your machine differently it would be of much help. I've never had a problem with using apt-get. Do you want to continue [Y/n]? y WARNING: The following packages cannot be authenticated! liberror-perl git-core patch Install these packages without verification [y/N]? y Err http://us.archive.ubuntu.com jaunty/main git-core 1:1.6.0.4-1ubuntu2 404 Not Found [IP: 91.189.92.183 80] Err http://us.archive.ubuntu.com jaunty/main patch 2.5.9-5 404 Not Found [IP: 91.189.92.183 80] Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/git-core/git-core_1.6.0.4- 1ubuntu2_amd64.deb 404 Not Found [IP: 91.189.92.183 80] Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/p/patch/patch_2.5.9- 5_amd64.deb 404 Not Found [IP: 91.189.92.183 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? Anything reply that can help fix this would be helpful. I'm not sure if it's the git servers or my connection that might be the problem. I've used apt-get to pull other things, it's just failing with git.

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• How to handle sh: fetch: command not found

  - by Tyler Johnson

  Okay, I'm a noobie. I know how to build and compose a website, but I have no idea what I'm doing when it comes to servers and server commands, etc. I've recently had a problem with all of my sites on our servers going down all at once and then I have to go in and reboot the server for them to come up again. At first this was annoying, but now it is becoming agonizing as it now takes 3-4 reboots for the websites to come back up. I contacted support for my hosting, but they are not being very helpful. They just keep telling me what the issue might be and basically telling me that I'm going to have to look into it and figure it out, which really isn't possible since I know nothing. Anyway, here are the things they said were possible reasons: They said I have "strange logs" in my Apache webserver log, error: sh: fetch: command not found. My php.ini memory limit is: 256M which is very high. It should be 32M or 64M. Server is reaching Max Clients, meaning we have more than 150 visitors at a time. (They supposedly "fixed" this, but the sites/server are still going down) I have some Wordpress sites with plugins getting errors like: PHP Warning: pack(): Type H: illegal hex digit G in... PHP Fatal error: Cannot use object of type stdClass as array in... PHP Fatal error: Maximum execution time of 30 seconds exceeded in... PHP Fatal error: Call to undefined function file_exists() in... PHP Parse error: syntax error, unexpected '<' I know that's a lot, but I really am at wits end and have no idea what to do now. If anyone could maybe give me some advice or point me in the right direction I would greatly appreciate it! Thanks! Oh, and here are the specs for my server: RAM: 2048MB CPU Shares: 40 Primary Disk: 50GB Data Transfer: 75GB Port Speed: 5Mbps

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• How to replicate a windows servers (IIS,Files,ConfigurationState)?

  - by Geo

  Maybe a better question is: What is the closest competitor for DoubleTake? I am looking to replicate a windows production server in case it fails have a immediate backup. Any idead? NOTE 1: I forget to add that this server is on the EC2 Amazon Cloud. NOTE 2: The main situation we have is recreating the configuration settings like IIS, FTP Server, SQL Server, SVN Server. NOTE 3: So far I have been giving three options as answers for my original question: AppAssurance -- After talking to their sales team they do not support Amazon as cloud provider. Basically there is a technical need to be able to reboot from a disk or similar media. So ESX Virtual machine environment will work, but not the EC2. Acronis -- which works as a backup in ghost style. This will work for other type of scenarios. Use the Amazon EC2 API -- This option is ideal, but only works if you are developing a cloud application rather than hosting a regular application in a cloud scenario. This means that I am still looking for the answer. Any other ideas.

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• Timeout option not working on efi windows 7/windows8 dual boot machine

  - by Guenter

  I hav a gigbyte GA-Z77m-D3h mobo and installed Windows 8 Pro and Windows 7 Ultimate on two SSDs (in that order) in EFI mode. Now when I start my computer, I get the windows boot menu (text mode) with the two OSses to choose, but I have to manually press RETURN to have the computer boot into the Win OS. Even if I wait an hour, no default action takes place. Using bcdedit (from either of the OSses) I can successfully change the time out value, and it shows up in the bcdedit (no params) output. But it doesn't fire ... Here is my current BCDEdit output (headers are in German, but values should be readable): Windows-Start-Manager --------------------- Bezeichner {bootmgr} device partition=O: path \EFI\Microsoft\Boot\bootmgfw.efi description Windows Boot Manager locale de-DE inherit {globalsettings} integrityservices Enable default {default} resumeobject {5ad2802c-c60a-11e2-acdb-80331c501b11} displayorder {default} {current} {5ad2802a-c60a-11e2-acdb-80331c501b11} {5ad28028-c60a-11e2-acdb-80331c501b11} {5ad28029-c60a-11e2-acdb-80331c501b11} toolsdisplayorder {memdiag} timeout 5 displaybootmenu Yes Windows-Startladeprogramm ------------------------- Bezeichner {default} device partition=W: path \Windows\system32\winload.efi description Windows 7 locale de-DE inherit {bootloadersettings} recoverysequence {5ad2802e-c60a-11e2-acdb-80331c501b11} recoveryenabled Yes osdevice partition=W: systemroot \Windows resumeobject {5ad2802c-c60a-11e2-acdb-80331c501b11} nx OptIn Windows-Startladeprogramm ------------------------- Bezeichner {current} device partition=C: path \Windows\system32\winload.efi description Windows 8 locale de-DE inherit {bootloadersettings} recoverysequence {5ad28033-c60a-11e2-acdb-80331c501b11} integrityservices Enable recoveryenabled Yes isolatedcontext Yes allowedinmemorysettings 0x15000075 osdevice partition=C: systemroot \Windows resumeobject {5ad28031-c60a-11e2-acdb-80331c501b11} nx OptIn bootmenupolicy Standard hypervisorlaunchtype Auto (this output is from Win8; the Win7 looks nearly identical) If maybe the problem comes from a bad EFI Windows boot manager installation, can this be fixed without loosing my windows installations?

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• Simplest DNS solution for remote offices

  - by dunxd

  I look after a bunch of remote offices that connect via VPN - a Cisco ASA 5505 in each office acts as Firewall and VPN end point. Beyond that we keep things as simple as possible in the offices to minimise the support burden. We don't have any kind of server except in offices large enough to justify having someone dedicated to IT. Basically there is the ASA, some computers, a network printer and a switch. One of the problems I am seeing in a lot of offices is that DNS requests looking up hosts inside our network often fail - I'm assuming timeouts due to the offices internet connection (they are all in developing world countries) having some sub-optimal qualities (e.g. high latency caused by VSAT segments, or packet loss. The obvious solution to this is to have some sort of local DNS service that can serve local requests - so I think it would need to do zone transfers from our Microsoft Windows 2008 R2 DNS servers at HQ. However, simply installing Windows Servers in each office is both expensive, and creates a support burden. This got me thinking about pfsense/m0n0wall on embedded devices - those can act as a DNS server, and could be configured at HQ and sent out as just something that needs to be plugged into the network and can then be forgotten about by the staff locally. Maybe there are some alternatives to the ASA 5505 that include some DNS functionality. Has anyone here dealt with the problem, either using some kind of embedded device, or found some other solution? Any gotchas or reasons to avoid what I have suggested?

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• Hard Drive that was used before not detected or accessible in Windows 7

  - by Anders

  Hello SU: My PC crashed for some unknown reason, and I am still working on what caused that. However, I pulled my main (windows) drive from my computer and hooked it up to my roommate's machine and was able to pull the data I needed off of it (i.e. the drive is good). I hook up his drives as they were, I had to turn off his machine and unplug his secondary drive to hook mine up, boot his machine and there is no second drive available in windows explorer. I opened Device Manager to see if for some reason it's drive letter got un-assigned, but there is nothing listed in there except his primary hard drive, his optical drive and one other optical drive which I believe is the virtual drive Daemon Tools made. The drive shows up in the BIOS, however after I restarted his machine again it sits on the "Entering setup....." screen at the load window. The only thing I can think of is that may have messed with stuff is I used this tutorial to create a bootable XP install on a USB drive to install XP on my machine (I am 99% certain that the optical drive in my PC is broken) and maybe it used the other hard drive's letter for the USB drive for some reason, which doesn't make much sense since it was recognized it as a different drive letter before I started the process. It is possible that it used the secondary hard drive's letter for it's work, but once again I am uncertain. Where should I go from here? He his bound to wake up within the next several hours and will probably flip a lid if I cannot get some sort of handle on this. Any and all help is greatly appreciated. PS: Anyone who helps me get this situated has a beer or two on me, as long as you are in the greater metro Detroit area, or don't mind traveling a bit!

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• Loading a big database dump into PostgreSQL using cat

  - by RussH

  I have a pair of very large (~17 GB) database dumps that I want to load into postgresql 9.3. After installing the database packages, learning more or less how to use them, and fiddling around a little on various StackExchange pages (particularly this question), it looks like a proper command for me to use is something like: cat mydb.pgdump | psql mydb because of the format the dump is in. My machine has 16 GB of RAM, and I'm not familiar with the cat command but I do know that my RAM is 99% exhausted and the database is taking a while to load. My machine isn't non-responsive to the point of hanging; I can run other commands in other terminal windows and have them execute at a reasonable clip, but I am wondering if cat is the best way to pipe in the file or if something else is more efficient? My concern is that maybe cat could be using up all the RAM so the database doesn't have much to work with, throttling its performance. But I'm new to thinking about RAM issues like this and don't know if I'm worrying about nothing. Now that I think about it, this seems to be more of a question about cat and its memory usage than anything else. If there is a more appropriate forum for this question please let me know. Thanks!

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• TFTP Timing Out on Ubuntu VM

  - by valsidalv

  I'm running a Windows 7 PC with VMware installed which has my Ubuntu (10.04 Lucid Lynx). I recently installed a DHCP server and TFTP (Xinet tftpd) using these instructions. I've mapped a network drive so that my Windows has access to all the files in my VM through a 192.x.x.x IP address. I'm trying to throw some custom firmware onto a router. The router has its own built-in TFTP utility that will download the image. It successfully manages to do everything but it is slow because it writes it to flash memory. There is another method that is much quicker because it writes to RAM directly but it must use the TFTP server in Ubuntu. The issue I'm facing is that the Ubuntu TFTP transfer seems to be timing out. The transfer starts but never goes past ~60%. Here's my /etc/xinetd.d/tftp file (similar to a known working config): service tftp { protocol = udp port = 69 socket_type = dgram wait = yes user = nobody server = /usr/sbin/in.tftpd server_args = -s /home/user/tftp/ disable = no cps = 300 2 per_source = 60 } I've done some searching but can't find any parameters for this file to control timeout time or number of retries. The last two arguments (cps, per_source) and completely alien to me (can anyone explain). I have a few possible solutions but the easiest would be to get this TFTP server working. Can anyone help? Either with a timeout configuration or maybe even recommend a different TFTP server? Thanks!

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• Windows Network File Transfer to Samba server: “Are you sure you want to copy this file without its properties?”

  - by jimp

  I am transferring a lot of files to a new NAS based on OpenMediaVault, with the Samba 3.5.6 service running. I am transferring from Windows 7 64-bit to the NAS, and on some media files Windows is prompting about losing some property data across the transfer. I have never seen this before when transferring to Samba boxes I have built myself (vs this turnkey solution), so I'm guessing there must be a Samba setting I can change to preserve the file properties in question instead of permanently losing whatever they contain (Date Taken? Exposure? Flash Fired? etc). Or maybe I've just never encountered this before; I'm really not sure. I tried adding ea support = yes and store dos attributes = yes to the [global] section, but the problem remains. The Linux file system is ext4 mounted with user_xattr (full options: defaults,acl,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0) as Samba requires. Any ideas would be greatly appreciated. Thank you! Samba config: [global] workgroup = WORKGROUP server string = %h server include = /etc/samba/dhcp.conf dns proxy = no log level = 2 syslog = 2 log file = /var/log/samba/log.%m max log size = 1000 syslog only = yes panic action = /usr/share/samba/panic-action %d encrypt passwords = true passdb backend = tdbsam obey pam restrictions = yes unix password sync = no passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . pam password change = yes socket options = TCP_NODELAY IPTOS_LOWDELAY guest account = nobody load printers = no disable spoolss = yes printing = bsd printcap name = /dev/null unix extensions = yes wide links = no create mask = 0777 directory mask = 0777 use sendfile = no null passwords = no local master = yes time server = yes wins support = yes ea support = yes store dos attributes = yes Note: I found this related question, but it explains the loss due to the user trying to transfer from NTFS to FAT32.

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• How to correctly configure DNS for Icelandic domains and Plesk

  - by Leonard Challis

  I have a domain registered with ISNIC (domain.is). They only let you set nameservers that pass their requirements. I've been told it's this requirement that I need to fix: Nameserver must be consistently registered in DNS, i.e. its own A resource record must be available and a corresponding PTR resource record as well. I allocated two new IP addresses from my server host and at that point set their PTR records to ns0.domain.is and ns1.domain.is. After that I created two A records for that domain in Plesk, again ns0. and ns2.domain.is with their respective IPs. Next, I went to the ISNIC page to register my nameservers, along with their IP addresses I'd allocated and this worked perfectly for both without error. So the final job was to set the nameservers for the domain via ISNIC's control panel, however when I try, I'm getting this error: Test results for "NS0.DOMAIN.IS": The nameserver ns1.vps123.vpsprovider.com is not consistently registered in DNS (ns1.vps123.vpsprovider.com => 1123.123.123.123 => vps123.vpsprovider.com) The nameserver ns0.vps123.vpsprovider.com is not consistently registered in DNS (ns0.vps123.vpsprovider.com => 1123.123.123.123 => vps123.vpsprovider.com) The nameserver ns0.DOMAIN.IS is missing from the NS record set for DOMAIN.IS Test results for "NS1.DOMAIN.IS": The nameserver ns1.DOMAIN.IS is missing from the NS record set for DOMAIN.IS The nameserver ns0.DOMAIN.IS is missing from the NS record set for DOMAIN.IS This is really at the limits of my DNS knowledge I'm afraid. It feels like I'm close but maybe missing a vital part, linking the nameservers in Plesk or something?

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• What can cause kernel out_of_memory error?

  - by nbolton

  I'm running Debian GNU/Linux 5.0 and I'm experiencing intermittent out_of_memory errors coming from the kernel. The server stops responding to all but pings, and I have to reboot the server. # uname -a Linux xxx 2.6.18-164.9.1.el5xen #1 SMP Tue Dec 15 21:31:37 EST 2009 x86_64 GNU/Linux This seems to be the important bit from /var/log/messages Dec 28 20:16:25 slarti kernel: Call Trace: Dec 28 20:16:25 slarti kernel: [<ffffffff802bedff>] out_of_memory+0x8b/0x203 Dec 28 20:16:25 slarti kernel: [<ffffffff8020f825>] __alloc_pages+0x245/0x2ce Dec 28 20:16:25 slarti kernel: [<ffffffff8021377f>] __do_page_cache_readahead+0xc6/0x1ab Dec 28 20:16:25 slarti kernel: [<ffffffff80214015>] filemap_nopage+0x14c/0x360 Dec 28 20:16:25 slarti kernel: [<ffffffff80208ebc>] __handle_mm_fault+0x443/0x1337 Dec 28 20:16:25 slarti kernel: [<ffffffff8026766a>] do_page_fault+0xf7b/0x12e0 Dec 28 20:16:25 slarti kernel: [<ffffffff8026ef17>] monotonic_clock+0x35/0x7b Dec 28 20:16:25 slarti kernel: [<ffffffff80262da3>] thread_return+0x6c/0x113 Dec 28 20:16:25 slarti kernel: [<ffffffff8021afef>] remove_vma+0x4c/0x53 Dec 28 20:16:25 slarti kernel: [<ffffffff80264901>] _spin_lock_irqsave+0x9/0x14 Dec 28 20:16:25 slarti kernel: [<ffffffff8026082b>] error_exit+0x0/0x6e Full snippet here: http://pastebin.com/a7eWf7VZ I thought that perhaps the server was actually running out of memory (it has 1GB physical memory), but my Cacti memory graph looks OK to me... But strangely the load graph goes through the roof shortly before the kernel crashes: What logs can I look at for more info? Update: Maybe noteworthy - the CPU percentage and network traffic graphs were both normal at the time of the crash. The only abnormality was the average load graph.

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• Configure Domino to use SMTP routing and hMailServer

  - by Sébastien Lachance

  I have been trying for a couple of days to set up a Domino 8.5 server. Basically, I want everything to be run inside a local network. Right now I can send email to other user in the Domino directory without any mail address. I am pretty new to all this stuff, so maybe the answer will be really obvious. What I need to do is be able to send a mail from somewhere else to a domino user that will be redirected to his account. On the Domino server, I also have hMailServer installed on port 25. I configured Domino to use port 26. I followed those step to get where I am now. -I have set the Fully qualified Internet host name to "preview.notes". -Smtp Listener task changed to Enabled to turn on the Listener so that the server can receive messages routed via SMTP routing -Setting up SMTP routing within the local Internet domain (http://www.h2l.com/help/help85%5Fadmin.nsf/f4b82fbb75e942a6852566ac0037f284/7f9738a49efc4f58852574d500097b01?OpenDocument) -I modified the person to use the [email protected] address. -I'm using the hMailServer (which have the local "preview.local" domain name) to send mail to [email protected]. When sending mail I got an error telling that the DNS is not set up correctly. Is using the Domino Smtp server instead of hMailServer will solve the problem? I can Telnet the Domino Smtp Server.

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• Is this normal or does my AVG anitivirus have a virus? [closed]

  - by user390480

  Possible Duplicate: Computer is infected by a virus or a malware, what do I do now? [Note: This is not a duplicate and should not be closed as a duplicate as this is nothing like the other question. I am not asking if I have a virus, nor am I asking "what do I do now". I know that I have a virus and I know what to do. However, I am asking if these are normal AVG ads or if it has been taken over.] My Windows XP PC started acting strange and I am right now actually in Linux running off of a USB drive. I am running Avast under Linux and it has discovered some viruses on my XP drive. Some of the strange things happening in XP were: I could not get to Google.com My Hosts file was set to hidden and read only My Hosts file had an entry of ::1 And AVG had ads in it I've never seen before. Maybe it is normal but I Binged for AVG anti-virus and become.com but found no information. (The red lines and question mark are by me) Any thoughts?

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• Isolate clients on same subnet?

  - by stefan.at.wpf

  Given n (e.g. 200) clients in a /24 subnet and the following network structure: client 1 \ . \ . switch -- firewall . / client n / (in words: all clients connected to one switch and the switch connected to the firewall) Now by default, e.g. client 1 and client n can communicate directly using the switch, without any packets ever arriving the firewall. Therefore none of those packets could be filtered. However I would like to filter the packets between the clients, therefore I want to disallow any direct communication between the clients. I know this is possible using vlans, but then - according to my understanding - I would have to put all clients in their own network. However I don't even have that much IP addresses: I have about 200 clients, only a /24 subnet and all clients shall have public ip addresses, therefore I can't just create a private network for each of them (well, maybe using some NAT, but I'd like to avoid that). So, is there any way to tell the switch: Forward all packets to the firewall, don't allow direct communication between clients? Thanks for any hint!

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• correct file permissions for trac and git user to access gitolite server repos

  - by klemens

  hi, sounds like a stupid questions (to me), but i couldn't find any info. on my server i host some git repositories via gitolite, and have a trac for every repository. i have a user called git to push/pull from server (git clone git@server:repo). and trac is a apache vhost with mod_wsgi. this runs with the www-data user. so what riddles me (maybe because I have not much of a clue about file-permissions at all) is whats the best permissions setup (chown, chmod) for the git repositories (/home/git/repositories/...). www-data (or trac) needs to at least read permissions (i think). and git (or gitolite) needs obviously read/write permissions to push changesets. i tried a little bit around (i.e. adding www-data and/or git to the www-data/git group), but didn't got it right. at least one of the two don't work (git or trac). any suggestions are highly appreciated. regard, klemens

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• Computer sending data while turned off

  - by Nicklas Ansman

  I have a some what strange problem (which could have and easy and obvious solution for all I know). My problem is that when I've booted ubuntu (now 10.4 but same problem with 9.10) and turns it off it starts sending a HUGE amount of data via the ethernet cable, so much in fact that my router can't handle it and stops responding. As far as I can tell the computer is completely turned off with no fans spinning. I can add that if I boot windows I do not have this problem, just when exiting ubuntu. There are two "fixes" for my problem: Pull the ethernet cable until the next boot Turn off power to the PSU and wait for the capacitors to unload Is there anyone who knows what could be going on? I'd be happy to post some logs or conf-files. Currently I'm using the ethernet port on my motherboard which is a Asus P6T Deluxe V2 with an updated version of the BIOS (maybe not the latest but since it only happens when I've been in ubuntu I don't wanna mess with the BIOS too much). Regards Nicklas ---------Update 1---------- The router is a D-Link DIR 655 with the latest firmware. ---------Update 2---------- I've now reinstalled ubuntu (with 10.4) and I still experience the same problem.

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• Pivot table not refreshing sort order

  - by William Anthony

  I have Pivot Table that get its data source from another sheet, same workbook. I want the sort order of data is same as the data source order, I choose "Sort in data source order" in Pivot Table option. The problem is, when I change the data order on data source worksheet, then I refresh the Pivot Table, the sort order didn't change. I googled that the Pivot Table should be unlink first then re-link again in order to work properly, so I tried the following: The original data source has named range: origdata. The fake data source has names range: dummydata I changed manually data source to dummydata then changed back to origdata. The sort order did change as expected. Now I want to make the operation automated, so I'm using this code in Worksheet.activate event. Note that, PT is PivotTable instance. ... PT.SourceData = "dummydata" PT.RefreshTable PT.SourceData = "origdata" PT.RefreshTable ... Change data source from VBA didn't change the sort order just like I did with manual method. Why is that? Am I missing something? Maybe there are some routine called when I changed the data source manually via toolbar button? Thanks in advance for your help.

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• Need a recommendation for shared storage on auto-scaling ec2 w/ scalr

  - by john h.

  I have come across so many answers to this question that I am completely lost! I am moving our 2 sites to a load balanced ec2 system with scalr as our cloud manager. Now the question is coming up about persistent storage for the user's uploaded content and other files. Could someone please give me a suggestion and possible a link to a tutorial for the following setup and goals. 2 websites (1 Forum, 1 ecommerce). 1 LB 1 App server (to scale out to as many as needed) 1 DB server (to scale out to as many as needed) Our sites will need to autoscale and according to what I am learning about scalr, that means as new instances load up, I need to run a script to set the basics up on that server (git,php mods, pull site from git, move keys, etc) What I don't understand is how should I handle user uploaded content like profile pictures, avatars, product images, themes, etc... Do I mount an EBS or s3fs folder to hold the websites (maybe /var/www/websitefolder) or do I do something like mount the avatar folders /var/www/websitefolder/images/avatars) I am not sure where to go with this. Could someone give me some detailed help? -John

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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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• Change Windows 7 Explorer's Details Pane limits

  - by Paul

  For some reason, MS decided to completely kill the status bar's functionality in Win7 (and maybe Vista, but I don't know for sure). I have tried all possible options such as Classic Shell and so on. Basically, the one thing I miss most is seeing at a glance the total size of my selected files. I know I can press Alt+Enter or whatever, but that's not the point. The point is that the so-called 'details' pane stops providing details if more than 15 files are selected! WTH? Cannot understand the reason behind such a stupid arbitrary limit, that doesn't seem to be user-configurable at all. Anyway, what I'm looking for is a way to change that limit, either via the registry or otherwise. If changing the limit isn't possible, would it be possible for some programming genius to create a very small optimized light-weight non resource-hungry (you get the idea!) program whose sole purpose will be to automatically click the "Show more details..." link in the details pane after every file selection? For bonus points, the program should wait for a second or two after file selection is complete to do this, so that selecting multiple files in quick succession doesn't hit the HDD repeatedly. Any takers for the challenge? :)

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• WRT54GL Tomato Router in Client wireless mode to an iPhone Personal Hotspot

  - by Gordo

  I am trying to connect a router with Tomato firmware to an iPhone 4. The goal is to connect to the Personal Hotspot in Client Wireless mode. This should allow wired and wireless users to connect to the router rather then the iPhone. In theory this should be possible but I am having difficulty. Router Linksys WRT54GL Tomato 1.28.1816 firmware iPhone iPhone 4 iOS 5.1 (9B176) Carrier Rogers Wireless Personal Hotspot works with other devices, wifi/bluetooth/usb iPhone Personal Hotspot settings Mode: B/G Security: WPA or WPA2 Personal Encryption: AES Router IP: 172.20.10.1 Subnet: 172.20.10.0 Min IP: 172.20.10.2 Max IP: 172.20.10.14 maximum number of wireless tethered hosts is 5 I have followed the directions here: http://www.wi-fiplanet.com/tutorials/article.php/3810281 Ensured that the router subnet does not 'collide' with the iPhone subnet. Here is the configuration of the Tomato 'Basic - Network - Wireless' section: http://i.stack.imgur.com/pbmTB.png I have tried several variations of this configuration, but nothing seems to work. NOTE: I have successfully connected to my own wifi network in Wireless Client mode, so I am confident that there are no bad cables or other hardware issues. I would prefer to use Tomato, but DD-WRT maybe my only other option. Thanks!

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• why altgr+p doesn't work, AUTOHOTKEY

  - by voodoomsr

  Hi guys, i try and i try to find the bug in this script but i can't . Maybe some of you can give me a hint... Problem. When i press altgr&p it suppose that the Delete key is triggered, but the weird thing is that after one succesfull delete, if i continue pressing altgr&p appears the p, and the delete isn't triggered anymore. in the meantime i test other solution move to the right and then delete with the backspace, that works, but when i have text selected this alternative isn't good.... here is the code #InstallKeybdHook ;characters very used RAlt & e:: SendInput []{Left} Return RAlt & w:: SendInput <>{Left} Return RAlt & d:: SendInput (){Left} Return RAlt & s:: SendRaw {} SendInput {Left} Return RAlt & x:: SendInput ""{Left} Return RAlt & c:: SendInput ''{Left} Return RAlt & f:: SendInput * Return RAlt & r:: SendRaw + Return RAlt & v:: SendInput - Return ;comienzo y fin de linea RAlt & a:: SendInput {Home} Return RAlt & z:: SendInput {End} Return ;movimientos InEditon /* RAlt & p:: SendInput {Right}{BackSpace} Return */ <^>!p:: Send {Del} Return RAlt & o:: SendInput {Up} Return RAlt & l:: SendInput {Down} Return RAlt & k:: SendInput {Left} Return RAlt & ñ:: SendInput {Right} Return RAlt & ,:: SendInput {Enter} Return RAlt & i:: SendInput {BackSpace} Return ;; clipx ^mbutton:: sendinput ^+{insert} Return ^+k::^+Left +k::+Left ^k::Left +l::+Down ^+l::^+Down ^l::^Down +ñ::+Right ^+ñ::^+Right ^ñ::^Right +o::+Up ^+o::^+Up ^o::^Up +a::+Home ^+a::^+Home +z::+End ^+z::^+End

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• How ZFS handles online replacement in a RAID-Z (theoretical)

  - by Kevin

  This is a somewhat theoretical question about ZFS and RAID-Z. I'll use a three disk single-parity array as an example for clarity, but the problem can be extended to any number of disks and any parity. Suppose we have disks A, B, and C in the pool, and that it is clean. Suppose now that we physically add disk D with the intention of replacing disk C, and that disk C is still functioning correctly and is only being replaced out of preventive maintenance. Some admins might just yank C and install D, which is a little more organized as devices need not change IDs - however this does leave the array degraded temporarily and so for this example suppose we install D without offlining or removing C. Solaris docs indicate that we can replace a disk without first offlining it, using a command such as: zpool replace pool C D This should cause a resilvering onto D. Let us say that resilvering proceeds "downwards" along a "cursor." (I don't know the actual terminology used in the internal implementation.) Suppose now that midways through the resilvering, disk A fails. In theory, this should be recoverable, as above the cursor B and D contain sufficient parity and below the cursor B and C contain sufficient parity. However, whether or not this is actually recoverable depnds upon internal design decisions in ZFS which I am not aware of (and which the manual doesn't say in certain terms). If ZFS continues to send writes to C below the cursor, then we are fine. If, however, ZFS internally treats C as though it were gone, resilvering D only from parity between A and B and only writing A and B below the cursor, then we're toast. Some experimenting could answer this question but I was hoping maybe someone on here already knows which way ZFS handles this situation. Thank you in advance for any insight!

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