Consensus Protocols: Paxos | Paper Trail
You can’t really read two articles about distributed systems today without someone mentioning the Paxos algorithm. Google use it in Chubby, Yahoo used something a bit like it (but not the same!) in ZooKeeper and it seems that it’s considered the ne plus ultra of consensus algorithms. It also comes with a reputation as being fantastically difficult to understand - a subtle, complex algorithm that i
Henry Robinsonã«ã‚ˆã‚‹å„ªã—ã„Paxosã®è§£èª¬ - minghaiã®æ—¥è¨˜
ç¾åœ¨ã¯Clouderaã®ç¤¾å“¡ã§ã‚ã‚Šã€ZooKeeperã®ã‚³ãƒŸãƒƒã‚¿ã§ã‚‚ã‚ã‚‹Henry Robinsonã«ã‚ˆã‚‹Paxosã®å„ªã—ã„解説。ランãƒãƒ¼ãƒˆã®"Paxos made simple"ã«æ¯”ã¹ã¦ã‚‚ã¨ã¦ã‚‚優ã—ã„ãŒã€ä½•ã¨ãªã"Paxos made simple"ã‚’èªã‚“ã§ã„ã‚‹ã“ã¨ã‚’å‰æã¨ã—ã¦ã„るよã†ãªçœç•¥ãŒã‚ã‚Šã€ä¸¡æ–¹ã‚’交互ã«èªã‚€ã“ã¨ã‚’訳者ã¨ã—ã¦ã¯ãŠå‹§ã‚ã™ã‚‹ã€‚訳者ã¯ã“ã‚Œã ã‘ã§ã¯ä¸€éƒ¨ç†è§£ã§ããªã‹ã£ãŸã€‚ åˆæ„プãƒãƒˆã‚³ãƒ«ï¼š Paxos Henry Robinson / ヘンリー・ãƒãƒ“ンソン 今日ã€èª°ã‹ã®Paxosアルゴリズムã«ã¤ã„ã¦ã®è¨˜è¿°ç„¡ã—ã«2ã¤ã®åˆ†æ•£ã‚·ã‚¹ãƒ†ãƒ ã«ã¤ã„ã¦ã®ã‚¢ãƒ¼ãƒ†ã‚£ã‚¯ãƒ«ã‚’èªã‚€ã“ã¨ã¯ä¸å¯èƒ½ã ã‚ã†ã€‚ Googleã¯Chubbyã«ãれを使ã„ã€Yahooã¯ãã‚Œã«å°‘ã—ä¼¼ã¦ã„ã‚‹ã‚‚ã®ã‚’ZooKeeperã«ä½¿ã£ã¦ã„る。ãã‚Œã¯ã¾ã‚‹ã§ç©¶æ¥µã®åˆæ„アルゴリズムã ã¨è€ƒãˆã‚‰ã‚Œã¦ã„るよã†ã 。ã¾ãŸãã‚Œã¯ã¨ã‚“ã§ã‚‚ãªãç†è§£ã™ã‚‹ã®ãŒ
CSUR4703-42
42 Paxos Made Moderately Complex ROBBERT VAN RENESSE and DENIZ ALTINBUKEN, Cornell University This article explains the full reconfigurable multidecree Paxos (or multi-Paxos) protocol. Paxos is by no means a simple protocol, even though it is based on relatively simple invariants. We provide pseudocode and explain it guided by invariants. We initially avoid optimizations that complicate comprehens
Pythonã§Paxos - minghaiã®æ—¥è¨˜
toy_paxos.pyã®è§£èª¬ å‰å›žã¨åŒã˜ãcloudera社ã«å‹¤å‹™ã™ã‚‹Henryã•ã‚“ã®Paxosã®å„ªã—ã„解説。 今回ã®å…ƒè¨˜äº‹ã¯ä»¥ä¸‹ã€‚ãªãŠã€ä»Šå›žã¯å…¨è¨³ã¯ãªã—。 http://the-paper-trail.org/blog/?p=190 今回ã¯Pythonã§å®Ÿè£…ã—ãŸtoy_paxosを解説ã™ã‚‹ã€‚ toy(ãŠã‚‚ã¡ã‚ƒ)ã®ç”±æ¥ã¯æらãã€æ°ãŒãƒ‰ã‚¯è«–執ç†ã®åˆé–“ã«æ•°æ™‚é–“ã§å®Ÿè£…ã—ãŸã‚‚ã®ã®ãŸã‚謙éœã—ã¦ã„ã‚‹ã¨æ€ã‚れる。自分ã¨ã—ã¦ã¯æ£ç›´ã€ã‚ˆãã“ã‚“ãªè¤‡é›‘ãªãƒ—ãƒã‚°ãƒ©ãƒ を数時間ã§ã‹ã‘ã‚‹ã‚‚ã®ã ã¨æ„Ÿå¿ƒã™ã‚‹ã€‚ マルãƒã‚¹ãƒ¬ãƒƒãƒ‰ã§ã¯ã‚ã‚‹ãŒãƒžãƒ«ãƒãƒ—ãƒã‚»ã‚¹ã§ã¯ãªã„。å˜ä¸€PCã®ä¸Šã§è¤‡æ•°ã‚¹ãƒ¬ãƒƒãƒ‰ã«ã¦åˆæ„ã‚’å½¢æˆã™ã‚‹ã€‚Henryã•ã‚“も書ã„ã¦ã„ã‚‹ãŒã€localhostãŒãƒãƒ¼ãƒ‰ã‚³ãƒ¼ãƒ‰ã—ã¦ã‚ã‚‹ã ã‘ã§ã‚ã‚Šã€ãƒžãƒ«ãƒãƒ—ãƒã‚»ã‚¹ã«æ›¸ãç›´ã™ã®ã¯ãã‚“ãªã«é›£ã—ãã¯ãªã„ã¨æ€ã†ã€‚ æ°ãŒä½œæˆã—ãŸãƒ—ãƒã‚°ãƒ©ãƒ "toy_paxos.py"ã¯å…ƒè¨˜äº‹ã®"A few hour
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