does memcached work on windows 7
im trying to run memcached on my windows 7 machine within a rails project and it errors out.. 936 connection closed. 940 new client connection 940 set mem-development:c222efbcfc08b4850198cd1eea610f76 0 0 217 940 STORED Failed to write, and not due to blocking: Resource temporarily unavailable 940 connection closed. the same rails project works perfectly fine on vista and linux. i saw somewhere it could be due to firewall issue. but i checked to make sure memcached is allowed in windows firewall. any ideas? thanks
Re: Memcached and EC2
On Fri, Feb 12, 2010 at 01:26, Brian Moon br...@moonspot.net wrote: Slightly related: Is there any way to get persistent connections for memcached in PHP? There's no real static variables in it, but there seems to be something for mysql that attaches connections to the parent apache process, is there something similar for memcached? Or are you just permanently screwed and have to re-initialize everything each pageview? I tried googling for it, but I only get... unhelpful... results. http://us2.php.net/manual/en/memcached.construct.php or http://us3.php.net/manual/en/function.memcache-addserver.php depending on your library. Thanks, but how does that work exactly? I've been trying to find information about it, and what I've pieced together so far is that if you are running PHP as an Apache module, and if you are making your own extension in C, then you get access to methods that allow you to store stuff in some sort of shared memory in the Apache process, that you can retrieve between pageviews, such as socket handles or initialized arrays or similar. But there's nothing in the PHP language itself to do something like that, you have to make your own C module. Correct? And that then, in turn, means that the answer to the original question is that adding more servers doesn't slow down the app, if they're using persistent connections, because client initialization will only happen once? (Given the prerequsities above, and given that they actually make sure they only init once like a comment on that memcached manual page describes) And is this true for both PHP clients? /Henrik
Re: Memcached and EC2
Thanks, but how does that work exactly? I've been trying to find information about it, and what I've pieced together so far is that if you are running PHP as an Apache module, and if you are making your own extension in C, then you get access to methods that allow you to store stuff in some sort of shared memory in the Apache process, that you can retrieve between pageviews, such as socket handles or initialized arrays or similar. But there's nothing in the PHP language itself to do something like that, you have to make your own C module. Correct? Yeah. special PHP mumbo jumbo. And that then, in turn, means that the answer to the original question is that adding more servers doesn't slow down the app, if they're using persistent connections, because client initialization will only happen once? (Given the prerequsities above, and given that they actually make sure they only init once like a comment on that memcached manual page describes) And is this true for both PHP clients? I recall a thread a while back that the ketama/consistent hashing stuff with the old library redid all of the calculations on every request regardless of persistent settings. Don't recall if that was ever fixed or properly tested, but the complaining user had his performance problems go away when he stopped using that. I assume pecl/memcached isn't quite that stupid, but someone might want to verify for PHP's sake. -Dormando
Re: does memcached work on windows 7
tvinod wrote: im trying to run memcached on my windows 7 machine within a rails project and it errors out.. 936 connection closed. 940 new client connection 940 set mem-development:c222efbcfc08b4850198cd1eea610f76 0 0 217 940 STORED Failed to write, and not due to blocking: Resource temporarily unavailable 940 connection closed. Which release are you running on Windows, and did you build it yourself or did you get binaries? What was the source? I looked through the code briefly; the only places where that may pop up is where memcached tries to write to the socket and gets an error back from the OS. The error handling in the current code appears to print more information out, so I suspect you have an older build. the same rails project works perfectly fine on vista and linux. i saw somewhere it could be due to firewall issue. but i checked to make sure memcached is allowed in windows firewall. Yes, that is listed in older memcached issues, but I know of a couple of folks who have tried recent code on Windows 7 without seeing this issue. There could well be some firewall (from Windows or some other utility) causing an issue. If you can confirm it's something recent, maybe there is a way to get more info. One way would be with a debugger, but it may also just make sense to get you a binary with some more diagnostics. Regards, - Matt
Re: does memcached work on windows 7
Which version of memcached are you using? I seem to remember that those error messages are typical of older memcached versions on windows. I'm running 1.2.5 and I have never encountered that error. Oh look, here's me getting that problem and solving it, perhaps that helps: http://groups.google.com/group/memcached/browse_thread/thread/9a90d63f5f164fcf/7f10b2d6e65a5656?pli=1 I'm still running 1.2.5 though and I don't have the problem, you can grab a binary here: http://code.google.com/p/beitmemcached/ I was gonna recommend 1.2.6 that you can get here: http://code.jellycan.com/memcached/, but I just tested it and remembered why I wasn't running it, it has a dependency to MSVCR71.DLL for some weird reason, 1.2.5 doesn't have that. You also have this guy who started seeing the problem after installing some firewall: http://groups.google.com/group/memcached/browse_thread/thread/8ffab363145ed61e /Henrik On Fri, Feb 12, 2010 at 10:02, tvinod tvi...@gmail.com wrote: im trying to run memcached on my windows 7 machine within a rails project and it errors out.. 936 connection closed. 940 new client connection 940 set mem-development:c222efbcfc08b4850198cd1eea610f76 0 0 217 940 STORED Failed to write, and not due to blocking: Resource temporarily unavailable 940 connection closed. the same rails project works perfectly fine on vista and linux. i saw somewhere it could be due to firewall issue. but i checked to make sure memcached is allowed in windows firewall. any ideas? thanks
Re: Release 0.38 of libmemcached
Looking good. However, i couldn't get it working with PHP's memcached module on Centos 5.4/php 5.3.1 After updating to 0.38 and restarting apache, i got this error PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/ modules/memcached.so' - /usr/lib64/php/modules/memcached.so: undefined symbol: memcached_result_value in Unknown on line 0 Tried to recompile memcached module and got more errors. So i reverted back to 0.37 and it's all fine. Is this a libmemcached or PHP's memcached bug? On 11 fev, 15:23, Brian Aker br...@tangent.org wrote: Hi! From the changelog: * C++ interface for libhashkit. * Modified memcached_set_memory_allocators() so that it requires a context pointer. * memcached_clone() now runs 5 times faster. * Functions used for callbacks are now given const memcached_st. * Added MEMCACHED_BEHAVIOR_CORK. * memslap now creates a configuration file at ~/.memslap.cnf * memcached_purge() now calls any callbacks registered during get execution. * Many fixes to memslap. * Updates for memcapable. * Compile fixes for OpenBSD. * Fix for possible recursive decent on IO failure. http://download.tangent.org/libmemcached-0.38.tar.gz Cheers, -Brian
Re: Release 0.38 of libmemcached
Hi! On Feb 12, 2010, at 3:10 AM, diegomsana wrote: Is this a libmemcached or PHP's memcached bug? That was a macro which is now an inline. Which version of gcc is that from? Cheers, -Brian
