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mixi大è¦æ¨¡éšœå®³ã«ã¤ã„㦠解明編 - mixi engineer blog
ã“ã‚“ã«ã¡ã¯ã€ã‚·ã‚¹ãƒ†ãƒ 本部技術部ãŸã‚“ã½ã½Gã®æ£®æœ¬ã§ã™ã€‚ 先日ã®mixi大è¦æ¨¡éšœå®³ã®åŽŸå› ã¨ãªã£ãŸmemcachedã®ä¸å…·åˆã®è©³ç´°ãªè§£æ˜ŽãŒã§ãã¾ã—ãŸã€‚ å†æ¥é€±ã¾ã§ç™ºè¡¨ã‚’見åˆã‚ã›ã‚ˆã†ã¨æ€ã£ãŸã®ã§ã™ãŒã€æ—©ããŠä¼ãˆã—ãŸã»ã†ãŒã„ã„ã¨æ€ã„ã¾ã—ãŸã®ã§å…¬é–‹ç™ºè¡¨è‡´ã—ã¾ã™ã€‚ memcachedã¨libevent memcachedã¯libeventã¨ã„ã†ãƒ©ã‚¤ãƒ–ラリを使用ã—ã¦ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã‹ã‚‰ã®è¦æ±‚(接続ã€ã‚³ãƒžãƒ³ãƒ‰é€ä¿¡)を処ç†ã—ã¦ã„ã¾ã™ã€‚ libeventを使用ã™ã‚‹ã«ã¯event_baseã¨ã„ã†æ§‹é€ 体を用ã„ã¾ã™ã€‚ main threadã¯main_baseを使用ã—ã¾ã™ã€‚ static struct event_base *main_base; ... int main (int argc, char **argv) { ... main_base = event_init(); ... /* enter the ev
libevent-1.3b, libmemcached-1.4.4 ã§å›ºã¾ã‚‹? - moratorium
libevent-1.3b, libmemcached-1.4.4 ã§å›ºã¾ã‚‹? 2010-08-13 (Fri) 0:56 Uncategorized mixiã®ä»¶ã«ã¤ã„ã¦ã€nealã•ã‚“ã‹ã‚‰æƒ…å ±ã‚’è²°ã£ãŸã®ã§æ•°æ™‚間調査ã—ã¦ã¿ãŸã€‚ã¨ã„ã†ã®ã‚‚ã€ã†ã¡ã®è£½å“ã§ã‚‚libevent(evhttp)をリクエスト処ç†ã«ä½¿ã£ã¦ã„ã‚‹ã®ã§ã€ã“ã‚Œã«ãƒã‚°ãŒæœ‰ã‚‹ã¨éžå¸¸ã«å›°ã‚‹ã€‚ Nealã•ã‚“ã®ã¤ã¶ã‚„ã ã²ã¨ã¾ãšã€libevent-1.3b, libmemcached-1.4.4をビルドã™ã‚‹ã€‚memcachedã¯ã€-cã§åŒæ™‚接続数を制é™ã§ãる。ã§ã€ã“ã®åŒæ™‚接続数ã¨ã„ã†ã®ã¯ã€å®Ÿã¯ãƒ•ã‚¡ã‚¤ãƒ«ãƒ‡ã‚£ã‚¹ã‚¯ãƒªãƒ—ã‚¿ã®æ•°ã‚’制é™ã™ã‚‹äº‹ã§é”æˆã•ã‚Œã¦ã„る。memcached.cã®ä»¥ä¸‹ã®éƒ¨åˆ†ã€‚ /* * If needed, increase rlimits to allow as many connections * as needed. */
Erlang 㧠memcached を作ã£ã¦ã¿ã¾ã—ãŸã€‚ : DSAS開発者ã®éƒ¨å±‹
先日ã€ã“ã¡ã‚‰ã® Erlang ã®ä¸–ç•Œã§ã¯memcachedã¨ã‹è¦ã‚‰ãªã„ を興味深ãèªã¾ã›ã¦é ‚ãã¾ã—ãŸã€‚ ãŸã—ã‹ã«ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆå´ã‚‚ Erlang ã§æ›¸ã‹ã‚Œã¦ã„ã‚‹å ´åˆã€ä¾‹ãˆã°ã‚ャッシュサー ãƒãƒ¼ã«ã‚¢ã‚¯ã‚»ã‚¹ã‚’行ㆠWEB アプリケーションも Erlang ã§æ›¸ã‹ã‚Œã¦ã„れ㰠Erlang ã®ãƒ—ãƒã‚»ã‚¹é–“通信を使用ã™ã‚‹ã“ã¨ã§ç°¡å˜ã«ã‚ャッシュサーãƒã‚’実装ã™ã‚‹ ã“ã¨ãŒå‡ºæ¥ãã†ã§ã™ã€‚ã—ã‹ã—ã€WEB アプリケーションãªã©ã€å…¨ã¦ã®ã‚·ã‚¹ãƒ†ãƒ ã‚’ Erlang ã§æ›¸ãã«ã¯ã¾ã ç§ã«ã¨ã£ã¦å‹‡æ°—ãŒè¦ã‚‹äº‹ãªã®ã§ TCP/IP 㧠memcache プ ãƒãƒˆã‚³ãƒ«ã‚’å–‹ã‚‹ Erlang 版 memcached を作ã£ã¦ã¿ã¾ã—ãŸã€‚ ãã®åã‚‚ ememcached ã§ã™ã€‚ % ememcached.erl -module(ememcached). -export([start/0, ememcached/1, process_comm
CakePHPã¨nginx+memcachedã§æ‰‹è»½ã«ã‚ャッシュを活用ã™ã‚‹
nginx+memcachedãŒã‚ã¡ã‚ƒæ°—ã«ãªã£ãŸã®ã§è©¦ã—ã¦ã¿ã¾ã—ãŸã€‚ å…ƒãƒã‚¿ã¯ä¸‹è¨˜ã§ã™ã€‚ A 53,900% speedup: Nginx, Drupal, and Memcache bring concurrency up and page load time way down | TechnoSophos nginxをリãƒãƒ¼ã‚¹ãƒ—ãƒã‚ã‚·ã«åˆ©ç”¨ã—ãŸæ§‹æˆã§ã€ãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰ã®å‡ºåŠ›ã‚’memcachedã«ã‚ャッシュã—ã¦ãŠã‘ã°ã€æ¬¡å›žãƒªã‚¯ã‚¨ã‚¹ãƒˆã§ã¯nginxãŒãã®ã‚ャッシュをèªã¿å–ã£ã¦ãã®ã¾ã¾å‡ºåŠ›ã—ã¦ãã‚Œã¾ã™ã€‚ ã¤ã¾ã‚Šãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰ã«ãƒªã‚¯ã‚¨ã‚¹ãƒˆã‚’経由ã•ã›ãšã«nginxã‹ã‚‰å³å‡ºåŠ›ã™ã‚‹ã®ã§ã‹ãªã‚Šã®é«˜é€ŸåŒ–ãŒè¦‹è¾¼ã‚ã‚‹ã¨ã„ã†å„ªã‚Œã‚‚ã®ã§ã™ã€‚ リンク先ã§ã¯ãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰ã«Drupalを利用ã—ã¦ã„ãŸã®ã§ã™ãŒã€ã“ã“ã§ã¯CakePHPを利用ã—ã¦ã¿ã¾ã™ã€‚ 1. å…¨ä½“æ§‹æˆ ãƒªãƒãƒ¼ã‚¹ãƒ—ãƒã‚ã‚·ã«nginx(Port: 80)を使ã„ã€ãƒ
memcachedプãƒãƒˆã‚³ãƒ«ã«ã¤ã„ã¦
※ memcachedプãƒãƒˆã‚³ãƒ«ã®ä»•æ§˜æ›¸ã¯ä»¥ä¸‹ã«ã‚ã‚Šã¾ã™ã€‚ http://code.sixapart.com/svn/memcached/trunk/server/doc/protocol.txt データã®ä¿å˜ã‚’è¡Œã†ã‚³ãƒžãƒ³ãƒ‰(set,add,replace,append,prepend)ã¯ã€ä»¥ä¸‹ã®ã‚ˆã†ãªæ–‡æ³•ã¨ãªã‚Šã¾ã™ã€‚ <コマンド> <key> <flags> <exptime> <bytes> <data> <key>ã¯ä¿å˜ã™ã‚‹ãŸã‚ã®ã‚ーåを指定ã—ã¾ã™ã€‚実装ã«ã‚ˆã£ã¦ã‚‚ç•°ãªã‚Šã¾ã™ãŒã€æœ€å¤§é•·ã¯250byteã§ã™ã€‚ <flags>ã¯ã‚¢ãƒ—リケーション特有ã®32bitã®å€¤(0〜4294967295)を指定ã™ã‚‹ã“ã¨ãŒã§ãã€ãƒ‡ãƒ¼ã‚¿ã®å–得時ã«æ ¼ç´ã—ãŸæ™‚ã®å€¤ãŒè¿”ã•ã‚Œã¾ã™ã€‚ <exptime>ã¯ãƒ‡ãƒ¼ã‚¿ã®æœ‰åŠ¹æœŸé–“を秒数ã§æŒ‡å®šã—ã¾ã™ã€‚指定ã—ãŸæ™‚間経éŽã™ã‚‹ã¨ã€è‡ªå‹•çš„ã«ã‚ーãŒå‰Šé™¤ã•ã‚Œã¾ã™ã€‚0を指定ã™ã‚‹ã¨è‡ªå‹•å‰Šé™¤ã•ã‚Œ
Memcache lockless queue implementation (v2)
The new Google App Engine 1.3.1 SDK has an added method on memcache called “grab_tailâ€. This is a great little method that removes the need for my lockless queue to manage the read counter. We still need to manage the write counter though, because there doesn’t seem to be a way to add items to a memcache namespace with an arbitrary name. I have also added a way to rollback in the case that your pr
ウノウラボ Unoh Labs: PHPã§æš—å·åŒ–・復å·åŒ–ã‚ã‚Œã“ã‚Œ
GT Nitro: Car Game Drag Raceã¯ã€å…¸åž‹çš„ãªã‚«ãƒ¼ã‚²ãƒ¼ãƒ ã§ã¯ã‚ã‚Šã¾ã›ã‚“。ã“ã‚Œã¯ã‚¹ãƒ”ードã€ãƒ‘ワーã€ã‚¹ã‚ル全開ã®ã‚«ãƒ¼ãƒ¬ãƒ¼ã‚¹ã‚²ãƒ¼ãƒ ã§ã™ã€‚ブレーã‚ã¯å¿˜ã‚Œã¦ã€ã“ã‚Œã¯ãƒ‰ãƒ©ãƒƒã‚°ãƒ¬ãƒ¼ã‚¹ã€ãƒ™ã‚¤ãƒ“ーï¼å¤å…¸çš„ãªã‚¯ãƒ©ã‚·ãƒƒã‚¯ã‹ã‚‰æœªæ¥çš„ãªãƒ“ーストã¾ã§ã€æœ€ã‚‚クールã§é€Ÿã„車ã¨ã‚«ãƒ¼ãƒ¬ãƒ¼ã‚¹ã§ãã¾ã™ã€‚スティックシフトをマスターã—ã€ãƒ‹ãƒˆãƒã‚’è³¢ã使ã£ã¦ç«¶äº‰ã‚’打ã¡ç ´ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ã“ã®ã‚«ãƒ¼ãƒ¬ãƒ¼ã‚¹ã‚²ãƒ¼ãƒ ã¯ãã®ãƒªã‚¢ãƒ«ãªç‰©ç†å¦ã¨ç´ 晴らã—ã„グラフィックスã§ã‚ãªãŸã®å¿ƒã‚’爆発ã•ã›ã¾ã™ã€‚ã“ã‚Œã¾ã§ãƒ—レイã—ãŸã“ã¨ã®ãªã„よã†ãªã‚‚ã®ã§ã™ã€‚ GT Nitroã¯ã€ãƒªãƒ•ãƒ¬ãƒƒã‚¯ã‚¹ã¨ã‚¿ã‚¤ãƒŸãƒ³ã‚°ã‚’試ã™ã‚«ãƒ¼ãƒ¬ãƒ¼ã‚¹ã‚²ãƒ¼ãƒ ã§ã™ã€‚æ£ã—ã„瞬間ã«ã‚®ã‚¢ã‚’シフトã—ã€ã‚¬ã‚¹ã‚’æ€ã„切りè¸ã‚€å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ã¾ãŸã€å¤§ç‰©ãŸã¡ã¨ç«¶ã„ã¤ã¤ã€è»Šã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã¨ã‚¢ãƒƒãƒ—グレードも行ã‚ãªã‘ã‚Œã°ãªã‚Šã¾ã›ã‚“。世界ä¸ã§æœ€é«˜ã®ãƒ‰ãƒ©ã‚¤ãƒãƒ¼ã¨è»Šã¨ã‚«ãƒ¼ãƒ¬ãƒ¼ã‚¹ã«æŒ‘ã‚€ã“ã¨ã«ãªã‚Šã€ãƒ‰ãƒ©ãƒƒã‚°ãƒ¬ãƒ¼ã‚¹ã®çŽ‹å†
Google App Engine version migration
I had a need for an application that I am writing on Google App Engine for a way to store jobs and then process them all at once. I found the idea for a Memcached lockless queue and created an implementation of it: queue.py To write to it (I do this from a view where I want to store some stats about the data that was shown in the view): thisQueue=queue.Queue(QUEUE_NAME) def method(): thisQueue.wri
Memcached Lockless Queue
I’m working on a project that needs a simple server side lightweight, scalable message queue. I’m interested in Erlang and Yaws, but the learning curve seems to me incredibly high – not only on the code implementation front, but also the tool and management front. Moreover I have clients – in the people sense of the word – who may not be particularly interested in learning a new language, let alon
Memcacheã§ã‚¹ãƒ”ンãƒãƒƒã‚¯ã‚’実装ã—ã¦Task Queue処ç†çµæžœã‚’集約ã—ã¦ã¿ã‚‹ãƒ†ã‚¹ãƒˆ - スティルãƒã‚¦ã‚¹ã®æ›¸åº«ã®æ›¸åº«
TaskQueueã§åˆ†æ•£å‡¦ç†ã—ãŸçµæžœã‚’ã¾ã¨ã‚ã‚‹ã¨ãã¯ã€æŽ’他を考慮ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚Datastoreを使ã†å ´åˆãªã‚‰ã€å˜ã«çµæžœã‚’æ–°è¦ã‚¨ãƒ³ãƒ†ã‚£ãƒ†ã‚£ã¨ã—ã¦è¿½åŠ ã—ãŸã‚Šã€ã‚¨ãƒ³ãƒ†ã‚£ãƒ†ã‚£ã‚°ãƒ«ãƒ¼ãƒ—ã®æ¥½è¦³æŽ’他を使ã£ãŸã‚Šã™ã‚Œã°OKã§ã™ã€‚一方ã€ã‚„ã£ã±ã‚ŠMemcacheã§ã‚¹ãƒ”ーディーã«é›†ç´„ã—ãŸã„よã€ã¨ã„ã†å ´åˆã¯ã€Memcache上ã§æŽ’他を実装ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚以å‰ã®ã‚¨ãƒ³ãƒˆãƒªã«ã¡ã‚‡ã‚ã£ã¨æ›¸ã„ãŸMemcacheService#incrementã§ã‚¹ãƒ”ンãƒãƒƒã‚¯ã¨ã„ã†æ–¹æ³•ã«ã¤ã„ã¦èª¬æ˜Žã—ã¦ã»ã—ã„ã¨ã„ã†ã‚³ãƒ¡ãƒ³ãƒˆã‚’id:miztakaã•ã‚“よりã„ãŸã ã„ãŸã®ã§ã€ã“ã“ã«æ”¹ã‚ã¦æ›¸ããŸã„ã¨æ€ã„ã¾ã™ã€‚ Memcacheã§ã¯æŽ’他制御ãŒå¿…è¦ ã”å˜ã˜ã®ã¨ãŠã‚Šã€App Engineã¯ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§è¤‡æ•°ã®App Serverã«ã‚ˆã‚‹ã‚¯ãƒ©ã‚¹ã‚¿ãŒæ§‹æˆã•ã‚Œã¦ãŠã‚Šã€ã¾ãŸMemcacheサービスã¯ã‚¯ãƒ©ã‚¹ã‚¿å…¨ä½“ã§å…±æœ‰ã•ã‚Œã‚‹ã‚°ãƒãƒ¼ãƒãƒ«ãªã‚ャッシュã¨ã—ã¦æ©Ÿèƒ½ã—ã¾ã™
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pythonã§memcachedを使ã£ã¦ã¿ãŸ | Ken's blog
tornado/memcache.py at async-memcache from dpnova's tornado - GitHub
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