The State of Open Source FundingJoin me for a walk through Open Source Funding 101: an examination of how money flows through the ecosystem to open source maintainers. Versions of this…
ç±³Facebookã€SSDã‚’ã‚ャッシュã¨ã—ã¦åˆ©ç”¨ã™ã‚‹ãŸã‚ã®æŠ€è¡“「FlashCache â’Š0ã€ã‚’公開 | OSDN Magazine
ç±³Facebookã¯10月10æ—¥ã€Linuxå‘ã‘ã®æ±Žç”¨ã‚ャッシュ技術「FlashCache â’Š0ã€ã‚’公開ã—ãŸã“ã¨ã‚’発表ã—ãŸã€‚SSDã‚’ã‚ャッシュ用ストレージã¨ã—ã¦åˆ©ç”¨ã™ã‚‹ãŸã‚ã®æŠ€è¡“ã§ã€ã‚³ã‚¹ãƒˆã‚’抑ãˆã¤ã¤æ€§èƒ½ã‚’強化ã§ãã‚‹ã¨ã„ã†ã€‚ FlashCacheã¯SSDã‚’ã‚ャッシュデãƒã‚¤ã‚¹ã¨ã—ã¦ä½¿ç”¨ã™ã‚‹ãŸã‚ã®ã‚ªãƒ¼ãƒ—ンソースプãƒã‚¸ã‚§ã‚¯ãƒˆã§ã€Facebook社内ã§2010å¹´ã«ã‚¹ã‚¿ãƒ¼ãƒˆã—ãŸã€‚Linuxカーãƒãƒ«ãƒ‡ãƒã‚¤ã‚¹ãƒ©ãƒƒãƒ‘ーã®ã‚¿ãƒ¼ã‚²ãƒƒãƒˆã¨ã—ã¦å®Ÿè£…ã™ã‚‹ã¨ã„ã†ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãƒ™ãƒ¼ã‚¹ã®ã‚¢ãƒ—ãƒãƒ¼ãƒã‚’ã¨ã‚‹ã€‚データ書ãè¾¼ã¿æ™‚ã«HDDã¨åŒæ™‚ã«SSDã«ã‚‚書ãè¾¼ã¿ã‚’è¡Œã„ã€èªã¿å‡ºã—時ã«ã¯SSDã‚’å‚ç…§ã™ã‚‹ã€‚FacebookãŒãƒ¦ãƒ¼ã‚¶ãƒ¼ãƒ‡ãƒ¼ã‚¿ã‚’ä¿æŒã—ã¦ã„ã‚‹ã¨ã„ã†MySQLã¨InnoDBエンジンã¨é€£æºã—ã¦å‹•ä½œã™ã‚‹ã‚ˆã†é–‹ç™ºã•ã‚Œã¦ã„ã‚‹ãŒã€Linuxシステムã®ã‚ャッシュシステムã¨ã—ã¦ã‚‚利用ã§ãã‚‹ã¨ã„ã†ã€‚ â’Š0ã¯æ–°ã—ã„ブランãƒã¨ãªã‚Šã€èªã¿å‡ºã—ã¨æ›¸ãè¾¼ã¿
Consistent Hashing を試ã™
Consistent Hashing ã¯ã€ 複数ã®ãƒŽãƒ¼ãƒ‰ã«ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’分散ã•ã›ã‚‹æ–¹æ³•ã¨ã—ã¦ã€ Amazon Dynamo ã‚„ Cache::Memcached::Fast ãªã©ã§ä½¿ã‚ã‚Œã¦ã„るアルゴリズムã§ã™ã€‚ ã“ã®æ–‡ç« ã§ã¯ã€Perl ã§å®Ÿéš›ã« Consistent Hashing を実装ã—〠ãã®ç‰¹å¾´ã‚’ç†è§£ã™ã‚‹ã“ã¨ã‚’目的ã¨ã—ã¾ã™ã€‚ æ›´æ–°å±¥æ´ 2008-06-01: 公開 サーãƒãƒ¼å°æ•°ã§å‰²ã£ãŸä½™ã‚Š (mod) を使用ã™ã‚‹ ã¾ãš Consistent Hashing ã¨æ¯”較ã™ã‚‹ãŸã‚ã«ã€ãƒ¬ã‚³ãƒ¼ãƒ‰ã«å¯¾ã—ã¦æ•´æ•°ã®ãƒãƒƒã‚·ãƒ¥å€¤ã‚’求ã‚〠ãƒãƒƒã‚·ãƒ¥å€¤ã‚’ノード数ã§å‰²ã£ãŸä½™ã‚Š (mod) ã§ã€ãƒŽãƒ¼ãƒ‰ã‚’é¸æŠžã™ã‚‹ã¨ã„ã†æ–¹æ³•ã‚’書ã„ã¦ã¿ã¾ã™ã€‚ ã“ã“ã§ã¯ã€ãƒãƒƒã‚·ãƒ¥å€¤ã®ç®—出㫠CRC (Cyclic Redundancy Check) を使用ã—ã¦ã„ã¾ã™ã€‚ use strict; use String::CRC; use Pe
New Open Source Cache System - DZone
The SHOP.COM Cache System is now available at http://code.google.com/p/sccache/ The SHOP.COM Cache System is an object cache system that... is an in-process cache and external, shared Cacheis horizontally scalablestores cached objects to disksupports associative keysis non-transactionalcan have any size key and any size datadoes auto-GC based on TTLis container and platform neutralIt was built in-
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