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• Advice for UPC/Surge Protector in home office

  - by Fred

  I'm just starting out as an independant developer, mostly Unix stuff with some Windows thrown in occasionally. I've been running two machines, a linux and a windows dev machine. Long story short, we had a bad storm come through last week and I unplugged one machine, forgot to unplug the other and the p/s and mobo ended up dead. Luckily I backup to an external service religiously (rsync.net for anyone interested), so there was no loss in data, but it did show me a glaring hole in my current setup, namely, lack of UPC and Surge Protection (this has honestly never been an issue before). Can anyone recommend a UPC/Surge Protector for a home office? It only needs to support a single machine (I opted to use vmware instead of rebuilding that machine), but it's a quad core Phenom 2 with a 1k watt p/s. This is outside my experience so I thought I'd get some input from others. I'm looking for something that's reasonably priced and does the job reasonably well. I don't need absolute 100% uptime, just something to protect my PC better than it is now.

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• Dns - wildcard vs. cname subdomains

  - by Matthew

  Alright I have to admit I'm confused with how DNS works. I've always just added things until they worked, and now it's time to learn how they work. So one confusing thing to me is that there's sort of two places I can have records. I have an account with rackspace cloud servers. And then there's the place I registered the domain. But both allow me to edit DNS records. Should I do everything at both places or is one better than the other or am I missing the point? Subdomains confuse me too. I'd like to be able to just have a wildcard subdomain (I've done this in the past.) I just don't like the idea of adding a cname record or A record every time I need a new subdomain. Then I read this and it says: The exact rules for when a wild card will match are specified in RFC 1034, but the rules are neither intuitive nor clearly specified. This has resulted in incompatible implementations and unexpected results when they are used.

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• Can a OS be copied from one hard drive to another and still boot?

  - by AlexMorley-Finch

  Background My computer gets stuck on the make and model screen after the BIOS screen, aka the Toshiba screen. After some research I've realized that the problem is the hard drive. I'm using an old 250gb model that USED to be used for backup purposes, however I loaded windows 7 ultimate onto it This hard drive has trouble getting up to full RPM therefore cannot boot correctly until its warmed up. meaning that my pc needs to be restarted several times before it boots (once it took my 13 reboots to get my pc on!) From my research its either that, or lack of power supply, and I've tried multiple PSUs. Question I have my OS and all my files on this 250gb HDD... If I were to literally open the explorer, and copy EVERYTHING (including hidden files obviously) from this 250gb, to a spare 500gb I've got knocking about... Will it boot if I just copy everything? I cannot be bothered to load another OS onto my PC so if there is a way I can just copy the existing one over from one HDD to another and have it boot normally. This would be epic! I've heard about HDD cloning software. But before I purchase and/or download this software, I need to know if i can just copy the OS over through the windows explorer

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• Western Digital HDD now freezes my BIOS when loading the video card!

  - by Vercas

  After I have successively and successfully installed 3 Windows XP's on the same partition (Don't ask why...), I restarted my computer again and the BIOS just froze when it loaded the video card. Together with my uncle, we tracked down the problem and found out it's the HDD's fault. We tried booting without the HDD and it worked! (No other HDD (I have only one) but with a Ubuntu Live CD in.) We tried the HDD with a different data bus (It was from an identical computer) but that one didn't let my BIOS recognize the HDD. We also put the HDD in another computer as the second HDD and it DID recognize it but Windows XP kept saying it cannot install a driver and that it installed successfully. Happily, I have managed to backup some of my most important files in that other computer. The following is a list of tests that we have run. With the HDD Original data bus Original computer Result: BIOS freezes WITHOUT the HDD Original data bus Original computer Result: Everything works just fine! With the HDD ANOTHER data bus Original computer Result: Cannot see the HDD With the HDD Original data bus ANOTHER computer Result: It worked! With the HDD ANOTHER data bus ANOTHER computer Result: It worked! During the tests, we had only two data buses and two computers. (each data bus from it's own computer) Strange thing is that the second data bus cannot let the BIOS see the HDD in my computer but works just fine with the other computer. I beg you to help me! I have my most important data on that HDD and I really cannot afford to buy another decent IDE HDD now!

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• 150 TB and growing, but how to grow?

  - by seandavi

  My group currently has two largish storage servers, both NAS running debian linux. The first is an all-in-one 24-disk (SATA) server that is several years old. We have two hardware RAIDS set up on it with LVM over those. The second server is 64 disks divided over 4 enclosures, each a hardware RAID 6, connected via external SAS. We use XFS with LVM over that to create 100TB useable storage. All of this works pretty well, but we are outgrowing these systems. Having build two such servers and still growing, we want to build something that allows us more flexibility in terms of future growth, backup options, that behaves better under disk failure (checking the larger filesystem can take a day or more), and can stand up in a heavily concurrent environment (think small computer cluster). We do not have system administration support, so we administer all of this ourselves (we are a genomics lab). So, what we seek is a relatively low-cost, acceptable performance storage solution that will allow future growth and flexible configuration (think ZFS with different pools having different operating characteristics). We are probably outside the realm of a single NAS. We have been thinking about a combination of ZFS (on openindiana, for example) or btrfs per server with glusterfs running on top of that if we do it ourselves. What we are weighing that against is simply biting the bullet and investing in Isilon or 3Par storage solutions. Any suggestions or experiences are appreciated.

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• SQL Server 2012 Maintenance Plan can't modify

  - by Crazyd

  Click on any created Maintenance Plan: TITLE: Microsoft SQL Server Management Studio Value cannot be null. Parameter name: component (System.Design) BUTTONS:OK Create a new Plan I get this error: TITLE: Maintenance Plan Wizard Progress Saving maintenance plan failed. ADDITIONAL INFORMATION: The SaveToSQLServer method has encountered OLE DB error code 0x80004005 (Unspecified error). The SQL statement that was issued has failed. The SaveToSQLServer method has encountered OLE DB error code 0x80004005 (Unspecified error). The SQL statement that was issued has failed. BUTTONS:OK Edit an already created Backup Plan: Error 1 Error loading 'BackupDb' : The LoadFromSQLServer method has encountered OLE DB error code 0x80004005 (Unspecified error). The SQL statement that was issued has failed. . server=SERVER;package=Maintenance Plans\BackupLeadsDb; 1 1 Attemped Solutions: I've changed password for SA Account; I use Windows Authentication to log in; and I've registered C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\DTS.dll. Repair SQL Server 2012, Uninstall/ReInstall SQL Server 2012.

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• Recover data from hard drive with partitions (but not most data) overwritten

  - by Macha

  I have a 500GB hard drive I've been keeping around to recover data from that I removed from a failing NAS drive that got sort of... erratic at the end. I finally got rid of the NAS when during a firmware update it removed the partition table. Fast forward to a week ago, when I was building a new PC, and a mixup resulted in me placing the hard drive in question in the new PC and installing Windows XP on the first 100GB. I'm presuming any data on that first 100GB is now gone, but for the rest of it, is there any way I can recover it at home, as professional data recovery is currently too expensive? I have a blank 1TB HDD if I can store any images of that hard drive on. The problem was definitely with the NAS and not the hard drive, as the hard drive had a successful install of Windows when mistakenly place in the new PC, and there were capacitors in the NAS's circuitry clearly broken. The data I want to recover (in order of priority) is: High: Some jpgs of family photos. Medium: Some RAW files. (There are also jpg versions of all of these) Low: Some mp3s, avis and ISOs, I can re-rip most of these if need be, but it'd be handy not to have to. (I don't need a backup lecture, and if you can hold it in from nagging Jeff Atwood for it, you can hold it in from nagging me for it) In short: The partition tables are gone and overwritten. The data is not overwritten, except for an amount equal to the size of a Windows XP SP3 installation.

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• Physical Debian to VMWare: vmware-converter, dd-image or otherwise?

  - by Dabu

  we have two debian Lenny production machines, both running larger commercial websites. Now these machines need to be moved, and in the process, they need to be virtualized to VMWare ESX. If you believe the internet information, there are several ways to accomplish this. The easiest for us would be to use our weekly dd backup where the whole disk, however, I have no experience with this kind of technology and if it is really possible. The second best way would be via an application on the source machine virtualizing it and generating an ESX compatible VM. However, the software is beta and unsupported, and after installation, nothing really works (the /etc/init.d/vmware-converter script doesn't actually do anything, start and stop reply with success messages, yet ps shows that there are no new processes). The worst way with the most work would be to install a new machine and set it up manually, copying files and databases as needed. This part is clear in it's execution, and my question(s) do not touch this. Is my 1st way possible? Has anyone done this yet, or better, has a page with instructions? Or is there a help page that explains how to correctly install, run and use the vmware-converter tool using a Debian installation (it's possible that I dod something wrong during installation already)? Thank you.

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• Rescue system running TFS that BSODs, into vmware esxi

  - by 3molo

  Hi, After moving to new facilities, one of our old Dell servers running Windows Server 2003 R2 on PowerEdge 2650 HW BSODs with 0x8e. The server runs Team Foundation Server, so we have a few guys dependent on it. No one here knows TFS, so we have no idea how difficult it would be to setup from scratch. We have the MSSQL database(s) backed up, recent and fresh copy. Tried removing/refitting memory modules, but with no success. The system boots into safe mode but hangs occasionally. I booted a linux livecd and did a dd of both c: and d:, so I have all the data in compressed images on a vmware machine. For the guest, I created a 38G (actually it became 40GB) partition to act as C:, and booted a live cd. I then uncompressed the compressed disk image of c: and dd'd it to the new c: using 'gunzip -dc c.img.gz | dd of=/dev/sda1 bs=1M'. The operation ran for about 1000 seconds, and completed successfully. I assumed it would at least try to boot windows (but most likely BSOD due to not having correct drivers), but the Vmware ESXi guest does not seem to recognize it as a bootable disk. We don't have the vmware enterprise license, so the vmware converter cold cloning is not an option. Did I do something wrong in my dd's etc with the ISOs, or why would it not (try to) boot? Am I wasting my time? What other approach is there? Will continue to try to remove services and drivers to make the physical machine at least work reasonably well in safe mode. What do you suggest? 1. Continue to get the dd'd images to the virtual disk and get it to boot. 2. Install a new windows server, get team foundation server and restore from backup. 3. Focus on the old problematic hardware Any help appreciated

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• Managed LAMP platform for maximizing availability and global reach, not scalability

  - by user66819

  Assume a Linux/Apache/MySQL/PHP application for a small base of registered users. With small userbase, there are no traffic peaks so the scalability that cloud platforms offer is not imperative. But the system is mission-critical, so availability is the primary goal. Users are also distributed across Asia, Europe, and US, so multiple server locations that minimize users' network hops would be highly desirable. The dream: a managed VPS platform where we would configure a single server (uploading PHP and other files, manipulating database, etc.), and the platform would automatically mirror the server in a handful of key places around the world (say one on each US coast, one in Europe, one in east Asia). File system synchronization and MySQL replication would happen automatically. Core operating system is managed, so we don't need to do full system administration and security, and low-level backups are also done by service provider, though we also do our own backups as well. Couple this with some sort of DNS geo-detection, so users are routed to the nearest operational server... with support for https, of course. Does such a dream exist? If not, what are some approaches to accomplish the same end with minimal time investment and minimal monthly hosting costs?

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• 750Gig Hard Drive shows full with only 315Gigs used

  - by Chris Kelly

  I have a Win7 laptop with a 750Gig C: drive. It came partitioned with 714Gig usable from manufacturer. I installed programs, music files, etc up to 285 gigs. As of a few weeks ago it showed 285 Gigs. Two weeks of house guests later and it shows HD is full. I deleted some files but it still shows 652 Gigs on this drive while there are only 285 Gigs on drive. Relevant details: I am Administrator on laptop and have fair knowledge of what I am doing. I did not restore from backup, restore from mirror, upgrade HD's or anything else that would have touched the partition structure. Just daily use as imaging machine and web. I have checked partitions under disk administrator - no change, still partitioned with 714Gigs usable. Have looked through computer C drive by hand showing Hidden files and folders - no change. I have used JDisk Report to double check - it shows I have only 285 Gigs on C drive. I triple checked with TreeSize run as Administrator and it also shows 285 Gigs on C drive - yet Windows 7 still shows almost full. I used Windows 7 Utilities to Check for Disk Errors, and Defragged the drive. No errors shown and no change after Defrag.

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• Unrelated Files Corrupted on System Restore

  - by Yar

  I restored OSX 10.6.2 today (was 10.6.3 and not booting) by copying the system over from a backup. The data directories were not touched. In the data directories, I'm seeing some files as 0 bytes, and getting permission-denied errors when copying, even when using sudo cp or the Finder itself. Some programs, differently, take the files at face value and see no permission problems (such as zip), but they see the files as zero bytes, which would be game-over for recovery. cp: .git/objects/fe/86b676974a44aa7f128a55bf27670f4a1073ca: could not copy extended attributes to /eraseme/blah/.git/objects/fe/86b676974a44aa7f128a55bf27670f4a1073ca: Operation not permitted I have tried sudo chown, sudo chmod -R 777 and sudo chflags -R nouchg which do not change the end result. Strangely, this is only affecting my .git directories (perhaps because they start with a period, but renaming them -- which works -- does not change anything). What else can I do to take ownership of these files? Edit: This question comes from StackOverflow because I originally thought it was a GIT problem. It's definitely not (just) GIT. Anyway, this is to help put some of the comments in context.

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• Multiple Routers, Failover, DHCP and multiple gateways. NOT WAN-failover

  - by u_b

  I've had a look around google and this forum but could not find an answer to my question. So probably one of you can help me a little. My intended setup is: Router R1: wan connection to isp. connected backup server. provides some wireless SSID. other connected devices like printer, laptop, etc. both wired and wireless. Router R2: no wan connection to isp but connected to R2. connects mp3-streamer and music server. also serves as a wireless access point with same SSID. other than described connections only wireless connections. I would like to be able to control music even if R1 is off, e.g. with no internet connection. On the other hand I would like to access internet also in the case that R2 is off, i.e. no music access. Last but not least I would like to stream internet radio, i.e., R1 and R2 are on, and music is streamed from internet to R1 to R2 to streamer. I would like to realize all this using DHCP (also using static assignments) so i do not have to configure statically on android, laptop, etc. So my questions are: Can I make DHCP provide a list of two default gateways R1,R2? In order to make clients fallback to other gateway if currently assigned gateway is turned off? Thanks in advance, u_b

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• Mounting fuse sshfs fails when invoked by Cron on FreeBSD 9.0

  - by Tal

  I have a remote server filesystem that I'm attempting to mount locally on a FreeBSD 9 machine via FUSE sshfs, and Cron for a backup routine. I have ssh keys between the boxes setup to allow for passwordless login as the root user on the local machine. Cron is set to run the following script (in Root's crontab): #!/bin/sh echo "Mounting Share" /usr/local/bin/sshfs -C -o reconnect -o idmap=user -o workaround=all <remote user>@<remote domain>.com: /mnt/remote_server As root, I can run this script on the command line without issue, and without being asked for a password the share mounts successfully. Yet, when run by Cron the script fails. The path to sshfs is identical to the value of which sshfs Here is the email root receives from the Cron Daemon: X-Cron-Env: <SHELL=/bin/sh> X-Cron-Env: <HOME=/root> X-Cron-Env: <PATH=/usr/bin:/bin> X-Cron-Env: <LOGNAME=root> X-Cron-Env: <USER=root> Mounting Share fuse: failed to exec mount program: No such file or directory fuse: failed to mount file system: No such file or directory I'm stumped as to why I'm receiving No such file or directory in this instance. It further seems odd given that the paths appear to be correct. I've also attempted to compare the output of env on the shell with env inserted into the script. I don't see any environment variables that should cause this trouble. At bootup, FUSE reports its version as: fuse4bsd: version 0.3.9-pre1, FUSE ABI 7.8 Help me ServerFault wizards, you're my only hope!

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• System randomly freezes yet mouse still moves, SSD out of reallocatable sectors, should I replace it?

  - by user784446

  This problem has lasted for the past 48 hours. The first time it happened, a program I was running stopped responding, so I tried to end it from task manager. The processes at first were listed fine until hovered upon. Eventually, despite the mouse still being able to move, after a few persisting clicks the mouse finally stopped moving. The screen went blank shortly thereafter. The second time it occurred, items on the screen stopped responding - hovering over the taskbar or such wouldn't elicit a response. Sound would still play however. Eventually, the mouse became unresponsive and the system restarted itself. I suspect that it may be a problem of my SSD drive. After looking through some Google search results, I downloaded HDTunePro to determine if there's a problem with the drive. Results returned a problem of reallocated sector count. An error scan also revealed 48 bad sectors. Also, an attempt to backup the contents of the most important areas of the drive returned a few explorer "Error: cannot read source from disk" errors. Should I ditch the drive and use another drive or is there anything that can be done to repair the drive? SSD: OCZ Petrol 64gb CPU: AMD Athlon II X4 640 RAM: Generic 3GB DDR2 Motherboard: Gigabyte MA74GM-S2H OS: Windows 7 Ultimate x64 Thanks!

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• How do i install apache on my ubuntu 12.04 where it has virtualhost

  - by YumYumYum

  According to the docs https://help.ubuntu.com/10.04/serverguide/httpd.html i have done following, and that is almost how i do always in my Fedora, but Ubuntu looks like its not working. a) DNS to IP $ echo "127.0.0.1 a" > /etc/hosts $ echo "127.0.0.1 b" > /etc/hosts b) Apache virtualhost $ ls 1 2 default default.backup default-ssl $ cat 1 <VirtualHost *:80> ServerName a ServerAlias a DocumentRoot /var/www/html/a/public <Directory /var/www/html/a/public> #AddDefaultCharset utf-8 DirectoryIndex index.php AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost> $ cat 2 <VirtualHost *:80> ServerName b ServerAlias b DocumentRoot /var/www/html/b/public <Directory /var/www/html/b/public> #AddDefaultCharset utf-8 DirectoryIndex index.php AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost> c) load into Apache and restart the service $ a2ensite 1 $ a2ensite 2 $ a2dissite default $ /etc/init.d/apache2 restart d) Browse the new 2 hosts $ firefox http://a Does not work it goes always with http://a or http://b to /var/www/html How do i fix it so that it goes to its own directory e.g: http://a goes to /var/www/html/a/public not /var/www/html?

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• Can't mount hard drive. Ubuntu 12.04

  - by Sam

  I am trying to recover some pictures on my 320 GB Hard Disk, so I put in a Live Ubuntu CD and am in that right now. In the devices list, it shows my USB drive, but not my 320 GB Hard Disk. I can see the disk in Disk Utility (it says it's on /dev/sda), but it's not mounted, and it says it has a few bad sectors but it is OK. In Disk Usage Analyzer, it says my maximum capacity is 13.4 GB, so it's definitely not using the 320 GB Hard Disk. I tried the following: sudo mkdir /media/newhd (worked) sudo mount /dev/sda /media/newhd (didn't work. it says I must specify the filesystem type) I then tried: fsck.ext4 -f /dev/sda (didn't work. Said: Superblock invalid, trying to backup blocks. then: Bad magic number in super-block while trying to open /dev/sda. The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock) Does anyone have any ideas? The whole problem started when my Windows Vista said "Can't find operating system". Any ideas on how I can get on to my hard drive at /dev/sda?

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• Library conflict in Mac OS X

  - by Juan Medín

  I was trying to install the ImageMagick library on Mac OS X Snow Leopard, and first I tried port and, after it failed, homebrew. It updated some dependencies and installed ImageMagick without problems. So far so good. The problem came when I ran Apache. I got the following error in the system log: 07/04/11 12:55:15 org.apache.httpd[41841] httpd: Syntax error on line 115 of /private/etc/apache2/httpd.conf: Cannot load /opt/local/apache2/modules/libphp5.so into server: dlopen(/opt/local/apache2/modules/libphp5.so, 10): Library not loaded: /opt/local/lib/libpng12.0.dylib\n Referenced from: /opt/local/apache2/modules/libphp5.so\n Reason: image not found I checked the /opt/local/lib and surprise! I don't have the libpng12.0 but the libpng14.0. So, as far as I can tell, something went wrong installing the ImageMagick library. Now, I can't find a way to rollback to the previous libraries, other than copying them from the backup. Do you know if is there a way to recover the previous state or reinstall Apache? Or is this just a corrupt state and I must reinstall OS X?

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• Nvidia RAID 1 Problem. Degraded drives...

  - by Vedat Kursun

  I had a RAID 1 on my system which has a Gigabyte GA 8N SLI motherboard with a Nvidia chipset.(Nvidia Raid IDE ROM BIOS 4.84) When the system was working probably there used to be an icon on the system try which showed my two RAID disks. Bu after my friend accidentally clicked on the "Remove drive safely" icon while trying to disconnect her USB, I noticed that the RAID system wasn't working. After a reboot there was suddenly a failure message during boot screen. When I enter the Nvidia RAID setup utility (F10) I can see that both drives are degraded and that won't change even if I get into them and press R for Rebuild. Other options are only Delete and Exit. When I boot to Windows (XP Pro 32 Bit) I can see both my disks with the same data on each of them but my RAID 1 is broken. It's a relief to see that at least my RAID 1 was active but it's annoying not being able to rebuild it. Is there a way where I can rebuild my RAID 1 without having to delete the array and build it again? Cause I don't want to backup 400 Gigs of data and then recopy it to my drives... (Disks 2 x Seagate ST3500418 AS SATA Drives)

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• Azure Virtual Machines - what fault tolerance do they provide?

  - by Borek

  We are thinking about moving our virtual machines (Hyper-V VHDs) to Windows Azure but I haven't found much about what kind of fault tolerance that infrastructure provides. When I run VHD in Azure, I've got two questions: Is my VHD and all the data in it safe? I think that uploaded VHDs use the "Storage" infrastructure so they should be automatically replicated to multiple disks and geographically distributed but should I still make a full-image backup just to be safe? (Note that of course I will be backing up the actual data inside VMs that I care about; I just want to know if there is a chance greater than 0.0000001% that one day I will receive an email from Microsoft telling me that my VM is gone and that I should create or restore it from scratch). Do I need to worry about other things regarding the availability of my VMs? I mean, when I have an on-premise server I need to worry about the hardware itself, about the host operating system, what would happen if my router failed, if my Hyper-V's C: drive failed etc. Am I right in thinking that with Azure, their infrastructure takes care of all of this? Thanks.

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• Nvidia RAID 1 Problem. Degraded drives...

  - by Vedat Kursun

  I had a RAID 1 on my system which has a Gigabyte GA 8N SLI motherboard with a Nvidia chipset.(Nvidia Raid IDE ROM BIOS 4.84) When the system was working probably there used to be an icon on the system try which showed my two RAID disks. Bu after my friend accidentally clicked on the "Remove drive safely" icon while trying to disconnect her USB, I noticed that the RAID system wasn't working. After a reboot there was suddenly a failure message during boot screen. When I enter the Nvidia RAID setup utility (F10) I can see that both drives are degraded and that won't change even if I get into them and press R for Rebuild. Other options are only Delete and Exit. When I boot to Windows (XP Pro 32 Bit) I can see both my disks with the same data on each of them but my RAID 1 is broken. It's a relief to see that at least my RAID 1 was active but it's annoying not being able to rebuild it. Is there a way where I can rebuild my RAID 1 without having to delete the array and build it again? Cause I don't want to backup 400 Gigs of data and then recopy it to my drives... (Disks 2 x Seagate ST3500418 AS SATA Drives)

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• What kind of server configuration is best for a chatting app? [closed]

  - by mohabitar

  I'm just now starting to go deeper into the world of cloud hosting and databases, and am getting overwhelmed by how deep this information goes. It's all a little too much to consume in a short amount of time. I get a lot of pricing information, but I'm unable to determine what that means to me. I'm making what you might compare to an email app. Users can send messages to one another. I just don't understand, out of the several options, what would be ideal for an app like this, where users would be constantly sending and receiving text data. With Amazon DynamoDB, I have to specify a pre-defined throughput with number of reads and writes per second. Sure I can just type 50, but I'm not exactly sure what 50 writes per second represents. I'm trying to determine what would be the most cost efficient solution, and I want to know what a throughput of 50 reads/writes/second compares to. Is that a high number? What is a good throughput number for a message sending app with say 50,000 daily users? I'm just providing specific numbers so I can understand what these throughput numbers represent. 100 transactions/second to me seems like a small number since I'm not familiar with this stuff, so I'm just looking to bring everything in context. What would 100 read/write/second be useful for? Are there any average example values available? And I'm not sure what each service is good for. For a message sending app, is there any reason I'd want to choose say Amazon DynamoDB over Google App Engine? Any insight would be greatly appreciated.

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• Tuning up a MySQL server

  - by NinjaCat

  I inherited a mysql server, and so I've started with running the MySQLTuner.pl script. I am not a MySQL expert but I can see that there is definitely a mess here. I'm not looking to go after every single thing that needs fixing and tuning, but I do want to grab the major, low hanging fruit. Total Memory on the system is: 512MB. Yes, I know it's low, but it's what we have for the time being. Here's what the script had to say: General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance MySQL started within last 24 hours - recommendations may be inaccurate Enable the slow query log to troubleshoot bad queries When making adjustments, make tmp_table_size/max_heap_table_size equal Reduce your SELECT DISTINCT queries without LIMIT clauses Increase table_cache gradually to avoid file descriptor limits Your applications are not closing MySQL connections properly Variables to adjust: query_cache_limit (> 1M, or use smaller result sets) tmp_table_size (> 16M) max_heap_table_size (> 16M) table_cache (> 64) innodb_buffer_pool_size (>= 326M) For the variables that it recommends that I adjust, I don't even see most of them in the mysql.cnf file. [client] port = 3306 socket = /var/run/mysqld/mysqld.sock [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] innodb_buffer_pool_size = 220M innodb_flush_log_at_trx_commit = 2 innodb_file_per_table = 1 innodb_thread_concurrency = 32 skip-locking big-tables max_connections = 50 innodb_lock_wait_timeout = 600 slave_transaction_retries = 10 innodb_table_locks = 0 innodb_additional_mem_pool_size = 20M user = mysql socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp skip-external-locking bind-address = localhost key_buffer = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 4 myisam-recover = BACKUP query_cache_limit = 1M query_cache_size = 16M log_error = /var/log/mysql/error.log expire_logs_days = 10 max_binlog_size = 100M skip-locking innodb_file_per_table = 1 big-tables [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] [isamchk] key_buffer = 16M !includedir /etc/mysql/conf.d/

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• Full Apache config migration

  - by Victor Rashkov

  I searched alot and didn't find an applicable answer. I have a working LAMP setup on Ubuntu machine and I have to migrate to a new server in a different country. The old server is 11.10, the new server is 12.04LTS. My problem is that I simply can not remember the steps I followed when I configured the current server which is not the basic LAMP install. It is Apache with FastCGI, SuEXEC, a GD library, worker MPM and all sitting on top of a mhddfs system. There are also other configs I've changed and I can not recall what they are. Because of the complexity of the setup, my attempts to migrate to the new server fail. I get permissions errors, cgi problems etc. Therefore my question is : Is there a sane way to simply tar a full backup of the current web server installation, including MySQL, Php amd the apache server with all configs, and then move it to the new machine? I shall be forever thankful on any advise. So far non of thise I found here gave me an answer. Thanks!

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• Advice for UPC/Surge Protector in home office

  - by user37755

  I'm just starting out as an independant developer, mostly Unix stuff with some Windows thrown in occasionally. I've been running two machines, a linux and a windows dev machine. Long story short, we had a bad storm come through last week and I unplugged one machine, forgot to unplug the other and the p/s and mobo ended up dead. Luckily I backup to an external service religiously (rsync.net for anyone interested), so there was no loss in data, but it did show me a glaring hole in my current setup, namely, lack of UPC and Surge Protection (this has honestly never been an issue before). Can anyone recommend a UPC/Surge Protector for a home office? It only needs to support a single machine (I opted to use vmware instead of rebuilding that machine), but it's a quad core Phenom 2 with a 1k watt p/s. This is outside my experience so I thought I'd get some input from others. I'm looking for something that's reasonably priced and does the job reasonably well. I don't need absolute 100% uptime, just something to protect my PC better than it is now.

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