Twisted Introduction
hi dave, I’m Jayson Pryde, and I’m new to twisted. I’ve been learning Twisted via your awesome tutorial, and I am already in part 13. I tried to implement my own client-server system, but I am encountering some hangs in the client. It’s probably because I messed up with callbacks in the deferred. I’ve asked this via this link in stackoverflow: http://stackoverflow.com/questions/42418021/asynchrono
Jeff Dean: Design Lessons and Advice from Building Large Scale Distributed Systems – Perspectives
Disclaimer: The opinions expressed here are my own and do not necessarily represent those of current or past employers. Recent CommentsRaffaele Santopaolo on David Patterson Retires After 40 YearsJames Hamilton on Seagate HAMRTom Davies on Seagate HAMRMatt on Seagate HAMRJames Hamilton on Seagate HAMRMatt on Seagate HAMRJames Hamilton on Cost of Power in Large-Scale Data CentersChris K. on Cost of
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jungleG » Blog Archive » Distributed Social Networking Might Be Dead On Arrival
Blogs and geeks are buzzing (now you understand the picture above) about the release of FriendFeed’s web server code, named “Tornado“. Tornado is an open source version of the scalable, non-blocking web server and tools that power FriendFeed. The FriendFeed application is written using a web framework that looks a bit like web.py or Google’s webapp, but with additional tools and optimizations to t
Top 5 Database Research Topics in 2008
岡野原å›ãŒè‡ªç„¶è¨€èªžå‡¦ç†é–¢é€£ã§2008å¹´ã«èªã‚“ã è«–æ–‡ã®ãƒ™ã‚¹ãƒˆ5を紹介ã—ã¦ã„ã¾ã™ã€‚ãã‚Œã«å€£ã£ã¦ã€åƒ•ã‚‚個人的ã«ã‚¤ãƒ³ãƒ‘クトã®ã‚ã£ãŸ2008å¹´ã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ç ”究ã®ãƒ™ã‚¹ãƒˆï¼•ã‚’集ã‚ã¦ã¿ã¾ã—ãŸã€‚ Michael J. Cahill, Uwe Röhm and Alan D. Fekete. Serializable Isolation for Snapshot Databases. SIGMOD 2008. (ACM DOI) 真ã£å…ˆã«æ€ã„æµ®ã‹ã‚“ã§ããŸã®ãŒã“ã®è«–文。SIGMOD2008ã®ãƒ™ã‚¹ãƒˆãƒšãƒ¼ãƒ‘ーã§ã‚‚ã‚ã‚Šã¾ã™ã€‚僕自身ã€ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³å‡¦ç†ã‚’é•·ãç ”ç©¶ã—ã¦ã„ãŸçµŒé¨“ã‹ã‚‰ã€Serializability（ディスクã®read/writeã®é †ç•ªã‚’ã‚るプãƒãƒˆã‚³ãƒ«ã«å¾“ã£ã¦å…¥ã‚Œæ›¿ãˆã¦ã‚‚ã€ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®æ¤œç´¢ãƒ»æ›´æ–°çµæžœã«å½±éŸ¿ã‚’与ãˆãªã„）をä¿éšœã—ã¤ã¤ã€ä¸€ç§’é–“ã‚ãŸã‚Šã«å‡¦ç†ã§ãるトランザクションã®æ•°ï¼ˆã¤ã¾ã‚Šã‚¹ãƒ«ãƒ¼ãƒ—ット）を上ã’ã‚‹
分散ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†Git/Mercurial/Bazaar徹底比較
分散ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†Git/Mercurial/Bazaar徹底比較：ユカイã€ãƒ„ーカイã€ã‚«ã‚¤ãƒãƒ„環境ï¼ï¼ˆ3）（1/5 ページ） Subversionã¨ã¯ä¸€å‘³é•ã†ã€Œåˆ†æ•£ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†ã€ã¨ã¯ï¼Ÿ 最近ã€Linuxã‚’ã¯ã˜ã‚ã€Ruby on Railsã€MySQLã€OpenSolarisãªã©ã®ã‚ªãƒ¼ãƒ—ンソースプãƒãƒ€ã‚¯ãƒˆãŒæ¬¡ã€…ã¨åˆ†æ•£ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†ã‚·ã‚¹ãƒ†ãƒ ã‚’å°Žå…¥ã—始ã‚ã€ã€ŒGitã€ã€ŒMercurialã€ã€ŒBazaarã€ã¨ã„ã£ãŸã€åˆ†æ•£ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†ã‚·ã‚¹ãƒ†ãƒ ãŒæ³¨ç›®ã‚’æµ´ã³ã¦ã„ã¾ã™ã€‚ 本稿ã§ã¯ã€ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†ãƒ„ールã®ãƒ‡ãƒ•ã‚¡ã‚¯ãƒˆã‚¹ã‚¿ãƒ³ãƒ€ãƒ¼ãƒ‰ã§ã‚ã‚‹Subversion（以下ã€SVN）ã¨åˆ†æ•£ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†ã‚·ã‚¹ãƒ†ãƒ を比較ã—ãªãŒã‚‰ã€ãƒ¡ã‚¸ãƒ£ãƒ¼ãªåˆ†æ•£ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†ã‚·ã‚¹ãƒ†ãƒ ã§ã‚ã‚‹Gitã€Mercurialã€Bazaarã«ã¤ã„ã¦ç´¹ä»‹ã—ã¦ã„ãã¾ã™ã€‚ 集ä¸åž‹ã¨åˆ†æ•£åž‹ 最åˆã«ã€é›†ä¸ç®¡ç†æ–¹å¼ï¼ˆã¾ãŸã¯ã€é›†ä¸åž‹ï¼‰ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç®¡ç†ã‚·ã‚¹ãƒ†ãƒ ã¨åˆ†æ•£ç®¡ç†
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cagra: Reliable and Flexible Distributed Storage System 分散ストレージエンジンテクニカルデモ　α版リリース ã‚ã®ä¸Šé‡Ž (nyaxt) æ°ã¨ã€ã‚ã®å¤æ©‹ (frsyuki/viver) æ° å…±ä½œã® cagra*1。cagra ã¯åˆ†æ•£ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã‚·ã‚¹ãƒ†ãƒ ã§ã€memcached ã®åˆ†æ•£ç‰ˆã¨ã„ã†ã¨ã¡ã‚‡ã£ã¨èªžå¼ŠãŒã‚ã‚‹ã‘ã©ã€memcachedä½ã®ãŠæ‰‹è»½ã•ã§ä½¿ãˆã‚‹ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ï¼ˆç¾åœ¨ã¯ã‚ªãƒ³ãƒ¡ãƒ¢ãƒªã®ã¿ï¼‰ã§ã™ã€‚ストレージã¨ã„ã†æ„味ã§ã¯ã€MogileFS ã«è¿‘ã„ã®ã§ã¯ï¼Ÿã¨ã„ã†ã”指摘もã„ãŸã ãã¾ã—ãŸã€‚ç¾åœ¨ 24 ノード (24å°) ä½ã§ã‚‚ã¡ã‚ƒã‚“ã¨å‹•ã„ã¦ã„るよã†ã§ã™ã€‚（もã¡ã‚ã‚“ã€1ノードã§ã‚‚å‹•ãよ） ã—ã‹ã‚‚デフォルト㧠Ruby ãƒã‚¤ãƒ³ãƒ‰ãŒä»˜å±žã§ã™ï¼memcached を簡易 DB 代ã‚ã‚Šã¿ãŸã„ã« Ruby ã‹ã‚‰ä½¿ã£ã¦ã„る僕ã¨ã—ã¦ã¯ã€ã“ã‚Œã¯è©¦ã™ã—ã‹ãªã„ï¼ã¨ã„ã†ã“ã¨ã§
P2P分散ストレージ「Cagra〠- Blog by Sadayuki Furuhashi
id:nyaxtæ°ã¨ã®å…±åŒé–‹ç™ºã®åˆ†æ•£ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã€ŒCagraã€ï¼ˆã‹ãら）ã®ã‚¢ãƒ«ãƒ•ã‚¡ç‰ˆã‚’リリースã—ã¾ã—ãŸã€‚ cagra α3リリース cagra テクニカルデモ α２リリース 分散ストレージエンジンテクニカルデモ　α版リリース cagraã®Î±ç‰ˆè©¦ã—ã¦ã¿ãŸã‚ˆ - takumalog Cagraã¯ä»¥ä¸‹ã®ã‚ˆã†ãªç‰¹å¾´ã‚’æŒã£ãŸï¼ˆç›®æŒ‡ã—ãŸï¼‰P2P分散ストレージã§ã™ã€‚ Zeroconf マルãƒãƒžã‚¹ã‚¿ã§ãƒ¬ãƒ—リケーションã™ã‚‹Write 高速ãªåˆ†æ•£Read オプションã§é«˜é€ŸãªéžåŒæœŸWrite インターãƒãƒƒãƒˆãƒ¬ãƒ™ãƒ«ã‚ˆã‚Šã‚‚LANレベルã®ãƒžã‚·ãƒ³å°æ•°ã«ç‰¹åŒ– 巨大データサãƒãƒ¼ãƒˆ 高速イベント駆動システムコール＋軽é‡ã‚¹ãƒ¬ãƒƒãƒ‰ 超アジャ〜イルãªé–‹ç™ºä½“制 ã¾ã α版ã§å…¨éƒ¨ãŒå®Ÿè£…ã•ã‚Œã¦ã„ã‚‹ã‚ã‘ã§ã¯ãªã„ã§ã™ãŒã€ã¨ã‚Šã‚ãˆãšå‹•ãã¾ã™ã€‚ Zeroconf UDPマルãƒã‚ャストã§ãƒŽãƒ¼ãƒ‰ã‚’自動的ã«ç™ºè¦‹ã™ã‚‹ã®ã§ã€ä¸€åˆ‡è¨å®šãƒ•ã‚¡ã‚¤ãƒ«ã‚’書ã‹ãšã«å‹•ä½œã›ã‚‹
ActionScriptã§Webサーãƒãƒ¼ã¨åˆ†æ•£ã‚ªãƒ–ジェクトを書ã“ã†ã¨ã—ã¦ã¿ãŸ - Blog by Sadayuki Furuhashi
ãã—ã¦æŒ«æŠ˜ã—ãŸè©±ã€‚ Flexã§ã‚¿ãƒ¼ãƒŸãƒŠãƒ«ã‚¨ãƒŸãƒ¥ãƒ¬ãƒ¼ã‚¿ & Telentã§Flexを勉強ä¸ãªã®ã§ã™ãŒã€ã€Œæ–°ã—ã„言語をå¦ã¼ã†ã¨æ€ã£ãŸã‚‰ã€ãã®è¨€èªžã§Webサーãƒãƒ¼ã‚’書ã„ã¦ã¿ã‚‹ã¨ã„ã„ã€ã¨ã€ã©ã“ã‹ã§èžã„ãŸã“ã¨ãŒã‚るよã†ãªæ°—ãŒã—ãŸã®ã§ã€ActionScriptã§Webサーãƒãƒ¼ã‚’書ã„ã¦ã¿ã‚ˆã†ã¨æ€ã£ãŸã‚ã‘ã§ã™ã€‚ サーãƒãƒ¼ã‚‚ActionScriptã ã£ãŸã‚‰ã€FlashRemotingゲートウェイã ã¨ã‹AMFã®åž‹ã®ãƒžãƒƒãƒ”ングãŒã©ã†ã“ã†ã ã¨ã‹ä½•ã‚‚考ãˆãªãã¦ã‚‚ã€ByteArray#{read,write}Objectを使ã£ã¦ã‚ªãƒ–ジェクトやメソッド呼ã³å‡ºã—を直接投ã’åˆãˆã‚‹ã‚“ã˜ã‚ƒãªã„ã‹ã€‚ã“ã‚Œã¯ã™ã”ã„ï¼ æ¯Žå›žwriteObject(hogehoge)...ã¨æ›¸ãã®ã¯é‡Žæš®ãªã®ã§ã€dRubyã‚„Java RMIã®ã‚ˆã†ã«ã€ãƒ—ãƒã‚シオブジェクトを通ã—ã¦è¦‹ãŸç›®ä¸Šç›´æŽ¥ãƒ¡ã‚½ãƒƒãƒ‰ã‚’呼ã¹ãŸã‚‰å¬‰ã—ã„。↓ã“ã‚“ãªæ„Ÿã˜ã€‚ var obj:Remo
Amazon's Dynamo - All Things Distributed
Amazon's DynamoOctober 02, 2007 • 4557 words In two weeks we’ll present a paper on the Dynamo technology at SOSP, the prestigious biannual Operating Systems conference. Dynamo is internal technology developed at Amazon to address the need for an incrementally scalable, highly-available key-value storage system. The technology is designed to give its users the ability to trade-off cost, consistency
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Trading Consistency for Scalability in Distributed Architectures
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