Lexemetech
MapReduce is a programming model for processing vast amounts of data. One of the reasons that it works so well is because it exploits a sweet spot of modern disk drive technology trends. In essence MapReduce works by repeatedly sorting and merging data that is streamed to and from disk at the transfer rate of the disk. Contrast this to accessing data from a relational database that operates at the
Protocol Buffersã¯é…ã„ - Blog by Sadayuki Furuhashi
Google ã® Protocol Buffers ã¯ã€åŒæŠ€è¡“ã¨ç«¶åˆã™ã‚‹ãƒã‚¤ãƒŠãƒªã‚·ãƒªã‚¢ãƒ©ã‚¤ã‚ºå½¢å¼ã§ã‚ã‚‹ MessagePack ã¨æ¯”ã¹ã¦ã€å ´åˆã«ã‚ˆã£ã¦ã¯ 19å€ ä»¥ä¸Šé…ãã€ã‚·ãƒªã‚¢ãƒ©ã‚¤ã‚ºå¾Œã®ãƒ‡ãƒ¼ã‚¿ã‚µã‚¤ã‚ºã¯ 7å€ ä»¥ä¸Šã«ãªã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚å¹³å‡çš„ã«è¦‹ã‚‹ã¨ MessagePack ã®æ–¹ãŒé«˜é€Ÿã§ã‚ã‚Šã€é«˜ã„性能ãŒå¿…è¦ã¨ã•ã‚Œã‚‹ãªã‚‰ Protocol Buffers より MessagePack ã‚’é¸æŠžã™ã‚‹ã¹ãã§ã™ã€‚ …ã¨ã¯ã„ãˆã©ã¡ã‚‰ã‚‚éžå¸¸ã«é«˜é€Ÿãªã®ã§ã€å®Ÿéš›ã«ã¯ãã®APIã®é•ã„ã§é¸ã‚“ã æ–¹ãŒè‰¯ã„。Protocol Buffers 㨠MessagePack ã¯é‡è¦–ã—ã¦ã„る点ãŒç•°ãªã‚Šã€ä½¿ã„å‹æ‰‹ã¯å¤§ããç•°ãªã‚‹ã€‚ Protocol Buffers ã¨ã¯ä½•ã‹ Protocol Buffersã¯GoogleãŒé–‹ç™ºã—ãŸãƒã‚¤ãƒŠãƒªã‚¨ãƒ³ã‚³ãƒ¼ãƒ‰æ‰‹æ³•ã§ã€ä»¥ä¸‹ã®ã‚ˆã†ãªè¦ç´ ãŒæä¾›ã•ã‚Œã¾ã™ï¼š データフォーマットを記述ã™ã‚‹ãŸã‚ã®è¨€èªžï¼ˆ
Google Protocol Buffer - hidemonã®ãƒ–ãƒã‚°
Google Protocol Buffer ã¨ã„ã†ã‚‚ã®ãŒå…¬é–‹ã•ã‚ŒãŸ, ã¨Googleã®ãƒ–ãƒã‚°ã«å‡ºã¦ã„ãŸã®ã§, ã¡ã‚‡ã£ã¨èª¿ã¹ã¦ã¿ãŸ. プãƒã‚¸ã‚§ã‚¯ãƒˆã®ãƒ›ãƒ¼ãƒ ページã¯ã“ã¡ã‚‰. ãã‚‚ãã‚‚ãªã‚“ãªã®ã‹? 多言語対応ã®ã‚·ãƒªã‚¢ãƒ©ã‚¤ã‚¶, デシリアライザã ã¨æ€ãˆã°ã¾ã¡ãŒã„ãªã„ã ã‚ã†. ã¤ã¾ã‚Š, オブジェクトãªã©ã®æ§‹é€ データをãƒã‚¤ãƒˆåˆ—ã«å¤‰æ›ã—ãŸã‚Š, ãƒã‚¤ãƒˆåˆ—ã‹ã‚‰æ§‹é€ データã«å¤‰æ›ã™ã‚‹æ©Ÿèƒ½ã§ã‚ã‚‹. Javaãªã‚‰æ¨™æº–ã§Serializeã§ãã‚‹ã—, Pythonã§ã‚‚pickleã™ã‚Œã°ã„ã„ã‚“ã ã‘ã©, ã“れらã¯è¨€èªžå›ºæœ‰ã®ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆãªã®ã§, ãŸã¨ãˆã°Javaã§æ›¸ã出ã—ãŸã‚‚ã®ã¯Pythonã§ã¯èªã¿è¾¼ã‚ãªã„. ã¾ãŸã“れらã®æ©Ÿèƒ½ã¯, 言語ã®refrectiveãªæ©Ÿèƒ½ã‚’使ã£ã¦å®Ÿè£…ã•ã‚Œã¦ã„ã‚‹ã®ã§, ãã†ã„ã†è¦ç´ ã«ä¹ã—ã„C++ã§ã¯éžå¸¸ã«å®Ÿè£…ã—ã¥ã‚‰ã„. 最近C++ã¾ã‚りを勉強ã—ã¦ã„ãªã„ã®ã§, ã²ã‚‡ã£ã¨ã—ãŸã‚‰ã‚ã‚‹ã®ã‹ã‚‚ã—ã‚Œãªã„ã‘ã©. G
Big Sky :: Googleã®Protocol Buffersã‚’python,cpp,javaã€ä¸€æ°—ã«éŠã‚“ã§ã¿ã‚‹
é…ã‚Œã°ã›ãªãŒã‚‰Google Protocol Buffersã§éŠã‚“ã§ã¿ã¾ã—ãŸã€‚ protobuf - Google Code Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. Google uses Protocol Buffers for almost all of its internal RPC protocols and file formats. ã¾ãšã€ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã¯ä»¥ä¸‹ã®æ§˜ã«è¡Œã„ã¾ã—ãŸã€‚ãªãŠprotobufを展開ã—ãŸãƒ•ã‚©ãƒ«ãƒ€ã¯ä»¥ä¸‹ã®ãƒ•ã‚©ãƒ«ãƒ€ã€‚ C:Â¥tempÂ¥protobuf-2.0.0betaÂ¥ cpp版ã®ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ« 展開ã—ãŸãƒ•ã‚©ãƒ«ãƒ€ã®vsprojectsフォルダã«ã‚ã‚‹"protobuf.sln"ã‚’Visual Studioã§é–‹ãRele
Big Sky :: perl版ã®Google Protocol Buffersã€ã€Œprotobuf-perlã€ã§éŠã‚“ã§ã¿ã‚‹
perl版もã‚ã£ãŸã‚“ã§ã™ã。 Perl App Engine状æ³å ±å‘Šã€Protocol Bufferã®Perl対応 | エンタープライズ | マイコミジャーナル Perl App Engineã«é–¢é€£ã—ãŸã‚³ãƒ¼ãƒ‰ãƒ™ãƒ¼ã‚¹ã«ã¯ãŠã‚‚ã«æ¬¡ã®3ã¤ãŒã‚る。 Perl App Engine Perl XS module Sys::Protect Protocol Buffers for Perl http://journal.mycom.co.jp/news/2008/07/29/042/index.html protobuf-perl - Google Code Protocol Buffers for Perl. http://code.google.com/p/protobuf-perl/ ã•ã£ããéŠã‚“ã§ã¿ã¾ã—ãŸã€‚ ã¾ãšã€protobuf-perlã¯ã‚ªãƒªã‚¸ãƒŠãƒ«ã®æ”¹é€ ã¨ã—ã¦ä½œã‚‰ã‚Œã¦ãŠã‚Šã€ã‚¹ã‚±ãƒ«ãƒˆãƒ³ã‚¯ãƒ©ã‚¹
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