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• What is a 'best practice' backup plan for a website?

  - by HollerTrain

  I have a website which is very large and has a large user-base. I am trying to think of a 'best practice' way to create a back up or mirror website, so if something happens on domain.com, I can quickly point the site to backup.domain.com via 401 redirect. This would give me time to troubleshoot domain.com while everyone is viewing backup.domain.com and not knowing the difference. Is my method the ideal method, or have you enacted better methods to creating a backup site? I don't want to have the site go down and then get yelled at every minute while I'm trying to fix it. Ideally I would just 'flip the switch' and it would redirect the user to a backup. Any insight would be greatly appreciated.

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• EC2 persistence of machine

  - by Seagull

  I notice that EBS-backed AMIs are much like a VMWare instances -- I can stop them and also persist them to disk, and all this is done relatively quickly. However, I believe that S3 backed machines are different. They cannot be 'stopped', but rather can only be shut-down, written to S3 disk and started up again; with at least a 15 min delay in doing so. Why the difference? How do AMI providers decide whether to use EBS or S3? If I need to stop/persist/restart machines relatively frequently, then I am implicitly limited to just the EBS-backed machines?

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• Fast or automatic way to organize iphone/ipod apps

  - by Notitze

  Is there a tool or application that can help me quickly organize my iphone applications? The standard way of dragging and dropping 1 application at a time in folder is too frustrating for me. I gave up after 1 hour of trying... I found it to be such a waste of time ... I am looking for an application to automatically organize my apps in the standard folder categories at least (Productivity, Navigation, Photography, etc). I was not able to find one in the iTunes store. Any suggestions?

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• MySQL query very slow on Amazon RDS but really fast on my laptop?

  - by Luc

  I would love to know if anybody knows why this is happening. i've just migrated over to Amazon RDS for our website and our biggest query which takes .2 seconds to execute on my macbook takes 1.3 seconds to execute on the most expensive RDS instance. Obviously i've disabled query cache (and tested this) on my local computer and both databases are exactly the same. InnoDB, both have the same indexes etc. It's costing us a fortune ($2000 per month) for the fastest RDS instance and i'm losing faith quickly. any ideas?

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• JSP / Tomcat / Apache setup overview on Fedora Core

  - by Richard T

  Hi Folks, For someone with so much Java experience, boy do I feel clueless - thanks in advance for your help in my grocking the present (Feb, 2010) JSP environment. Here's what I am hoping to learn: Do I understand correctly that most people use Apache to "front-end" their Tomcat servers, such that Apache "talks" directly to web clients and "proxies" Tomcat servers? Do I understand correctly that Apache isn't capable of serving JSP directly but requires a server (like Tomcat)? Is there an RPM package for Fedora Core so I don't have to build one myself? Or, does Fedora Core's package installer do a good job on this one from source code? (Some do, some don't!) While I'm here asking questions; Does Tomcat come with a working example that one can start hacking on as a way to get started quickly? If not, got a good suggestion? Thanks folks, RT

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• svn diff including annotate/blame-alike information of when changes where made by who

  - by Wouter Coekaerts

  Can you add annotate/blame-alike information to svn diff, so that for every changed line it includes which user and revision changed that line? For example, an annotate-diff comparing revisions 8-10 could output something like: 9 user1 - some line that user1 deleted in revision 9 10 user2 + some line that user2 added in revision 10 The context, lines around it which haven't changed, may be included as well or not, doesn't matter. It's not just a matter of "quickly" writing a shell script combining the output of svn diff and svn annotate. annotate for example will never show you who removed a line. It's also not a matter of doing annotate on a revision in the past: We're not interested in who originally added the line that got removed (that's not the one who "caused" the diff), we want to know who removed it. I suspect the only way to implement something to do this is to inspect each and every commit between the two revisions being compared (and somehow map all the changes in the separate diffs to lines in the total diff)... Does there exist a tool that does something like that?

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• Windows Explorer Jumplist delay

  - by Jeremy B.

  I've begun to have an issue with the Jump list for Windows Explorer (Windows 7). What happens is that when i gesture click, or right click on the explorer icon the first time after rebooting the initial menu (Windows Explorer, Unpin) and the Jump List with my pinned folders and frequent folders works fine. Any subsequent attempt will open the initial menu, but the jump list will experience a long delay (10-20 seconds) before the pinned and frequent folders will pop up. Initially my frequent folders would grab a networked drive which I thought might be the cause. I have removed that from the list and there is still no change. I really enjoy being able to quickly hit directories i use often and this is quite frustrating. Any help would be extremely appreciated.

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• Form recognition using OCR and return image of the value

  - by Jonathan

  I'm on a project that process hundreds of forms. The forms have consistent formats but are filled out by hand by different people. I need a way to quickly processing all of these data into electronic forms. OCR recognition for typed document seems mature but for hand-writting is very lacking. For this thought, let's consider a form with several fields like this. Field_1: Value1 (example, Name: John, where Name is Field and John is value) Considering that forms are structured and typed, OCR should be able to recognize the fields. However, for the values of the fields, they are written and OCR will perform very poorly. So is there a way where the fields would be recognized on the imagem, then a image chunk of the value would be returned? Thanks.

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• How can I change my language/keyboard input language system-wide temporarily?

  - by Adam Lynch

  I currently have two languages set up; English and Dutch. The only difference is in keyboard input. The Dutch one uses the French/Belgian AZERTY layout and the English one uses the Irish/English QWERTY layout (@ = Shift+'). When a Belgian colleague needs to use my computer, I switch the language to NL (Dutch) (therefore the input to AZERTY) using the language bar, but it seems to be application-specific. (I.e: After changing the input to AZERTY for my colleague, if he then clicks on another program it switches back to QWERTY for that program). Is there a way I can quickly switch between the two comprehensively yet temporarily?

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• Rsync plugin to many local wordpress installs via script or cli

  - by Nick Abbey

  I am maintaining a large number of wordpress installs on a production server, and we are looking to deploy InfiniteWP for managing these installs. I am looking for a way to script the distribution of the plugin folder to all of these installs. On server wp-prod, all sites are stored in /srv//site/ The plugin needs to be copied from ~/iws-plugin to /srv//site/wp-content/plugins/ Here's some pseudo code to explain what I need to do: array dirs = <all folders in /srv> for each d in dirs if exits "/srv/d/site/wp-content/plugins" rsync -avzh --log-file=~/d.log ~/plugin_base_folder /srv/d/site/wp-content/plugins/ else touch d.log echo 'plugin folder for "d" not found' >> ~/d.log end end I just don't know how to make it happen from the cli or via bash. I can (and will) tinker with a bash or ruby script on my test server, but I'm thinking the command-line-fu here on SF is strong enough to handle this issue much more quickly than I can hack together a solution. Thanks!

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• Deleting... dialog box stays on screen for over a minute when deleting one small file

  - by stacey.richards

  Every now and again I log into a Windows Server 2003 box with a remote desktop connection and delete one small file. When I do this, the Deleting... dialog box appears and remains on the screen for well over a minute. After the dialog box disappears, if I delete another small file, the Deleting... dialog box appears then disappears quickly. Why does it take so long to delete the first file after logging into a Windows Server 2003 box with a remote desktop connection? Is there a trick to speeding it up?

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• Is there a usable HTML web gallery template for Lightroom 2?

  - by Johannes Rössel

  The built-in HTML gallery unfortunately generates invalid HTML markup so its looks are likely more coincidence than proper design. That aside its JavaScript usage prevents using the middle mouse button to open an image in a new tab. A look at the few free HTML gallery templates out there shows me that there seems to be little interest in building an actual HTML gallery which doesn't use JavaScript. Most of them are using JS to build fancy animations or in-page popup boxes containing the image. This may be nice for some people but at least one person who looks at my images is on dial-up and quickly opening all images in individual tabs to let them load and then close the connection is very nice to have there. Anyone seen such a gallery template; i. e. simple, plain HTML without JS? My HTML/CSS skills aren't that good that I can develop such a thing on my own, unfortunately.

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• Create an alias in Windows XP

  - by Lord Torgamus

  Back in school, I used to have a .login file along the lines of alias ll = ls -l alias dir = ls -Fhl alias web = cd ~/public/public_www/development ... I'd like to do that sort of thing with my XP box here at work, but most of the resources I've found online seem fairly complicated and heavy-duty. Is there a way to do this that doesn't involve mucking about in the registry or running a large batch file? EDIT: My original reason for asking this was that I only need the command line for one command in one specific folder, and I wanted to be able to get to that folder quickly when I launched the command line. But the accepted answer for this question is so good that I decided to ask about my original issue as a separate question here.

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• Fix for OpenSolaris with no gcc vs. Nexenta with no ext3

  - by Jake Wharton

  I'm attempting to migrate my server from linux to a Solaris variant during a hardware upgrade. The machine is based around an Abit AN-M2 board which has an NForce chipset. I have what seems to be a chicken-and-egg problem of sorts: OpenSolaris 2009.06 does not recognize the NIC and I cannot compile the drivers for it as it also lacks gcc. I haven't tested as to whether or not I can mount an ext3 partition yet but its moot if there is no networking. Nexenta 3.0b3 recognizes the NIC but I cannot get the ext3 drives mounted due to FSWfspart refusing to install. I do not know much about Solaris but I wager this is due to the fact that Nexenta is based around Debian as well. While I am reusing the mobo/CPU combo, I did just spent a lot of money on the other hardware around it and would very much like to get it up and running smoothly and quickly. Does anyone have any suggestions that are not: Get a new mobo/CPU Run another OS Use alternate NIC

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• Just one client bound to address and port: does it make a difference broadcast versus unicast in terms of overhead?

  - by chrisapotek

  Scenario: I am implementing failed over for a network node, so my idea is to make the master node listens on a broadcast ip address and port. If the master node fails, another failover node will start listening on this broadcast address (and port) and take over. Question: My concern is that I will be using a broadcast IP address just for a single node: the master. The failover node only binds if the master fails, in other words, almost never. In terms of network/traffic overhead, is it bad to talk to a single node through a broadcast address or the network somehow is smart enough to know that nobody else is listening to this broadcast address and kind of treat it as a unicast in terms of overhead? My concern is that I will be flooding my network with packets from this broadcast address even thought I am just really talking to a single node (the master). But I can't use unicast because the failover node has to be able to pick up the master stream quickly and transparently in case it fails.

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• How can I fix my WRT54GL's constant crashing?

  - by Aarthi

  I have a Linksys WRT54GL wireless router (the old blue-and-black) whose underside indicates it is Version 2. I've noticed that, on wireless mode, if I am on a Skype call or in a Google Hangout, the wireless aspect will crash completely. In addition, if I am connected via an ethernet cord, my quality (that is, how my voice is received) tanks very quickly. I suspect this is due, in part, to my internet connectivity itself (I'm on Comcast instead of Verizon FiOS, as I'd prefer) but I'd like to stop my wireless router's wireless capability from crashing. I considered a firmware upgrade, but it looks to me as if I am upgraded. Short of manually running ethernet all over my house, I'm not sure what to do. How can I solve my wireless router's issues? If the answer is "buy a new router," then that's valid, as well, in my opinion.

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• Firefox being really sluggish on php.net website?

  - by Rory

  Is it just me, or is firefox (3.5 on Ubuntu 9.10 karmic) really sluggish when opening the PHP.net website? When I have several tabs open with just the PHP.net website, and I tab up and down (with Control-PageUp/Down), it's slow to change tab. If I do it quickly, then firefox freezes for a few seconds (I know because it goes grey, which is a compiz feature to show unresponsive windows). The CPU usage also goes up when I'm tabbing to PHP.net pages. UPDATE: This appears to happen for all PHP.net webpages. For other pages, on other sites, Firefox is fine (for me).

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• How to consolidate servers with the not-very-strong infrastructure

  - by Sim

  All, Situation We are in retail industry with about 10 distributors and use Solomon as the standard ERP for all our systems Each distributor has 1 HQ and 5 - 10 branches, each branch has their own server (Windows 2000/XP/2003 + Solomon + another built-in POS system) Everyday, branches has to extract data and send (via email/Skype) to HQ for data consolidation purpose When we first deployed our ERP, the infrastructure (e.g. Internet connection) wasn't reliable enough. That's why we went with the de-centralized model (each branch got their own server) Now, the infrastructure is mature already. And we need to consolidate data more quickly (not from branches -- HQ -- our company but something like HQ -- our company only) Goal We just have Solomon servers in distributor HQ. All the transactions in branches (retrieved from POS) will by synchronized with HQ server directly) There is a backup plan just in case the Internet goes down, or HQ server goes down Question With the above question, could you guys suggests some model for me ? Should we use Terminal services, any other solutions ? Any watchout/suggestions ? Any good article to read 'bout this ? Thanks a lot

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• Perforce Proxy Server: Caching selective files [closed]

  - by fbrereto

  I just set up a Perforce proxy server for work. I'm noticing the cache directory is filling up very quickly -- with files I know I will never need. For example, there is a 'sandbox' directory in the depot where users keep personal branches and other work; a p4 sync is causing the p4 proxy cache to grab these user's sandboxes when I'll never need them. I would create a symbolic link for the sandbox directory to /dev/null but then I wouldn't be caching my sandbox, which I am interested in. Is there any way to tell the perforce proxy something to the effect of "if I haven't had to sync it, please don't cache it?"

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• Can Apache 2 be configured to start sending gzipped data early?

  - by rikh

  We have Apache set up to gzip compress html pages before they are sent to the client browser. However, some of our pages are slowish to generate and it seems that Apache is holding on until it has the complete page, compressing it, then sending it to the browser. There are big chunks of the page (the main important bits) that are actually generated and output fairly quickly. Is it possible to configure Apache to start compressing and send data for the page as soon as the script starts outputting something? Is it is, can you offer any help is how to do this? If not, can you suggest any other way to get gzip compression working for the server? The scripts that generate the pages are written in PHP. We are using Apache 2.0 on Linux.

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• MySQL mistake with grant option

  - by John Tate

  I am unsure reading the MySQL documentation if creating a user with the GRANT option will give them the power to create users and grant privileges, or change the privileges of other users databases. I have been creating databases for users like this CREATE DATABASE user; USE user; GRANT ALL PRIVILEGES ON *.* TO 'user'@'localhost' IDENTIFIED BY 'password' WITH GRANT OPTION; Is this the best way of doing it or have I just given my users too much control? They are people I am hosting sites for. Thankfully at this point they are trustworthy. I use quotas. Edit: I have realized I have been granting users access to all databases. This is obviously stupid I should be using this: GRANT ALL PRIVILEGES ON database.* to 'user'@localhost' IDENTIFIED BY 'password' What is the simplest way to revoke privileges for every user except root so I can quickly end this catastrophic rookie mistake?

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• Xen private networking between multiple hosts

  - by Joe

  I have two physical hosts running Xen 3.2, sharing storage via iSCSI. On these two hosts are a number of domUs and I'd like to network them in multiple private networks so they can only contact other domUs on their private network. My understanding of the xen documentation suggests it's possible to do this within one dom0 (ie create virtual networks between domUs), but I've found nothing explaining how this can be implemented across multiple dom0s on different hosts. The only thing that jumps to mind is manually creating iptable rules to route data to the other host, but this seems to lack elegance and could quickly grow cumbersome. Any suggestions? All advice is much appreciated!

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• How do I add color syntax highlighting to GNU emacs?

  - by Alex Reynolds

  I have two versions of emacs available to me on a locked workstation: $ /usr/local/bin/emacs --version GNU Emacs 22.3.1 $ /usr/bin/emacs --version GNU Emacs 21.4.1 In both cases, my terminal type is xterm when I run either version of emacs. When I run the v21 version of emacs, I get syntax coloring for Perl, HTML, and other modes. When I run the v22 version, I do not get syntax coloring. I would like to migrate from the v21 version because the combination of v21 emacs, GNOME Terminal and GNU Screen is eating Ctrl-arrow key chords, which prevents me from moving quickly between words. (OS X Terminal and GNU Screen do not have this issue.) The v22 version allows use of Ctrl-arrow key combinations with GNOME Terminal and GNU Screen. How do I fix the v22 version (or ask my sys admin to fix) so that it once again highlights syntax and allows me to use Ctrl-arrow key combinations?

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• Transferring websites from x64 to x86 server

  - by Ke

  Hi, I run a x64 staging server here along with the following: Solr Java etc. However, I am about to get a linode vps for production and quickly realising that x86 is the way to go for their lowest RAM package (thinking to upgrade later). My staging server is x64 with 12gb ram, so going down to 300mb ram is going to feel devilishly slow ;/ Here are my questions: 1) Will I have problems transferring my scripts, dbs etc from a x64 to x86 server? e.g. solr indexes 2) Is it worth going for the x86 package? I am probably going to upgrade later down the line and x64 might be better for the servers with more RAM? should I stick with x64 instead as there isnt much difference when using with low RAM? Cheers Ke

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• What is the best way to create RAID 1?

  - by user3125731

  I'm looking for a way to create the RAID 1 array without losing my data on CentOS. Here's my situation: I've got a web server running on CentOS. There is one VG partition with few LV volumes. I bought a second HDD (the same model and size as the first one) and I want to create the RAID 1 configuration. I can't just shut down this server for more than an hour because my clients will be disappointed. I need to do this as quickly as possible with minimal risk of data loss.

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