5x performance - switching from LWP to Furl & Net::DNS::Lite
Recently I rewrote some of our code that used LWP::UserAgent to use Furl instead, and have been observing more than 5x increase in performance (the CPU time spent for each HTTP request in average has dropped 82%). The fact clearly shows that if you are having performance issues with LWP::UserAgent it is a good idea to switch to Furl. And here are my recommendations when doing so: use the low-leve
Kazuho@Cybozu Labs: Compressing URLs in your Webapp, for size and speed
Last year I had a chance to talk about the internals of our service: Pathtraq at Percona Performance Conference (slides), in which I described the methods we use to compress the URLs in our database to below 40% of the original size, however had not released the source code since then. I am sorry for the delay, but have finally uploaded the code to github.com/kazuho/url_compress. It is generally
xfs stack overflow
Kazuho Oku @kazuho @kosaki55tea サーãƒç³»ã ã¨ã€ãƒ‡ã‚£ã‚¹ã‚¯ã«ãƒ‡ãƒ¼ã‚¿ã‚’ä¿å˜ã™ã‚‹ãŸãã„ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã¯fsyncã—ã¾ãã‚‹ã—ã€ã‚ªãƒ³ãƒ¡ãƒ¢ãƒªã®ã‚„ã¤ã¯ swap ã«è½ã¡ã‚‹ã ã‘ãªã®ã§ã€ä¾‹å¤–パス㧠xfs ãŒå‘¼ã°ã‚Œã‚‹ã“ã¨ã¯ã€ã»ã¨ã‚“ã©ãªã„ã‚“ã˜ã‚ƒãªã„ã‹ãªãƒ¼ã¨ 2010-04-25 02:57:35
生ã¾ã‚ŒãŸæ™‚ã‹ã‚‰ãƒ—ãƒã‚°ãƒ©ãƒžâ˜†èˆˆå‘³ã¨æ„Ÿæ€§ã§ä¸–界を驚ã‹ã™ï½œã€Techç·ç ”】
世界ã«æ™®åŠã™ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ 言語を開発ã—ãŸæ—¥æœ¬äººã€ã¾ã¤ã‚‚ã¨ã‚†ãã²ã‚æ°ã€‚å½¼ãŒã¤ãã£ãŸã‚ªãƒ–ジェクト指å‘ã®ã‚¹ã‚¯ãƒªãƒ—ト言語「Rubyã€ã¯ã‚·ãƒ³ãƒ—ルã§åˆ©ä¾¿æ€§ã«å„ªã‚Œã€ä¸–ç•Œå„国ã®ãƒ—ãƒã‚°ãƒ©ãƒžãŸã¡ã«æ„›ç”¨ã•ã‚Œã¦ã„る。ã“ã‚“ãªã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã¯ã€ãŸã¶ã‚“日本ã«ã²ã¨ã‚Šã—ã‹ã„ãªã„。 プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã®æœ¬è³ªçš„ãªé¢ç™½ã•ã¯ãƒ‡ã‚¶ã‚¤ãƒ³ã«ã‚ã‚‹ã¨æ€ã„ã¾ã™ã€‚ã“ã‚“ãªã“ã¨ã‚’ã“ã‚“ãªãµã†ã«é”æˆã—ãŸã„ã€ãã®ãŸã‚ã«ã¯ã“ã†ã—ãŸã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã§ã“ã®ãƒ‡ãƒ¼ã‚¿æ§‹é€ を使ãŠã†ã€‚ã“ã®ã‚ˆã†ã«ãƒ‡ã‚¶ã‚¤ãƒ³ã‚’ç©ã¿é‡ãã¦ã€æœ€çµ‚çš„ã«ã‚³ãƒ³ãƒ”ュータã«ã‚ã‹ã‚‹è¨€èªžã«ã—ã¦ã„ã。ã¨ã¦ã‚‚刺激的ã§ã‚¯ãƒªã‚¨ãƒ¼ãƒ†ã‚£ãƒ–ãªä½œæ¥ã§ã™ã€‚Rubyã¯ãã®ãŸã‚ã®ãƒ„ールã§ã‚ã‚Šã€ç§ã¯ãã®ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã‚’ã—ã¦ã„ã‚‹ã®ã§ã€ã€Œä¸€ç²’ã§äºŒåº¦ãŠã„ã—ã„ã€ã§ã™ã（笑）。 ãŸã ã€ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã¯äººé–“ãŒç›¸æ‰‹ã€‚見ã‹ã‘ã¯ã‚³ãƒ³ãƒ”ュータを相手ã«ã—ã¦ã„ã¦ã‚‚ã€æœªæ¥ã®ãƒ¦ãƒ¼ã‚¶ãƒ¼ãŒã€Œã‚¹ãƒˆãƒ¬ã‚¹ãªã楽ã—ãプãƒã‚°ãƒ©ãƒ ãŒæ›¸ã‘ã‚‹ã€ã‚’考ãˆãªãŒã‚‰é–‹ç™ºã‚’続ã‘ã¦ã„ã¾ã™ã€‚ãã®æ„Ÿè¦šã¯æ•°å€¤
Kazuho@Cybozu Labs: 既製å“ã®ç®¡ç†ãƒ„ールを使ã‚ãªã„ã“ã¨ã§ã‚¦ã‚§ãƒ–サービス㮠TCO を下ã’る話ã«ã¤ã„㦠hbstudy#8 ã§è©±ã—ã¦ããŸä»¶
昨日ã€hbstudy#8 ã§è©±ã‚’ã™ã‚‹æ©Ÿä¼šã‚’ã„ãŸã ãã“ã¨ãŒã§ããŸã®ã§ã€Nagios ã‚„ Amanda ã¨ã„ã£ãŸæ—¢è£½å“ã®ç®¡ç†ãƒ„ールやãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ツールを使ã‚ãšã«å†…製ã—ãŸã“ã¨ã§ã€Œãƒ‘ストラックã€ã®é‹ç”¨ã‚³ã‚¹ãƒˆã‚’下ã’ãŸã€ã¨ã„ã†è©±ã‚’ã—ã¦ãã¾ã—ãŸã€‚ ã‚‚ã¡ã‚ã‚“ã€ã€Œæ—¢è£½å“を使ã‚ãªã„ã€ã¨ã„ã†ã®ã‚‚ã²ã¨ã¤ã®æ‰‹æ®µã«ã™ãŽã¾ã›ã‚“ã‹ã‚‰ã€ãれを無闇ã«ãŠå‹§ã‚ã™ã‚‹ã¤ã‚‚ã‚Šã¯ã‚ã‚Šã¾ã›ã‚“。ãŸã ã€å°å›žã‚Šã®åŠ¹ãツールを組ã¿åˆã‚ã›ã‚‹æ‰‹æ³•ã«ã‚‚å分ãªç«¶äº‰åŠ›ãŒã‚ã‚‹ã¨ã„ã†ç‚¹ã€ã‚ã‚‹ã„ã¯ãã®äº‹ä¾‹ã¨ã—ã¦å‚考ã«ãªã‚Œã°å¹¸ã„ã§ã™ã€‚ スライドã¯ã“ã¡ã‚‰ã€‚hbstudy é‹å–¶ã®çš†æ§˜ã€è©±ã‚’èžã„ã¦ãã ã•ã£ãŸçš†æ§˜ã€ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã—ãŸã€‚
Kazuho@Cybozu Labs: blockdiff を使ã£ãŸãŠæ‰‹è»½ãƒ›ãƒƒãƒˆãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—環境ã®æ§‹ç¯‰ (Linux, MySQL, etc.)
一昨日ã«é–‹å‚¬ã•ã‚ŒãŸ hbstudy #7 ã«ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ã®è©±ã‚’èžãã«è¡Œã£ã¦ãã¾ã—ãŸã€‚Amanda ã‚’ä¸å¿ƒã«ã—ãŸè©±ã§ã€ã¨ã¦ã‚‚勉強ã«ãªã‚Šã¾ã—ãŸã€‚ãŒã€è¨å®šãŒã‚ã‚“ã©ãã•ãã†ã ãªãã€ã¨ã‚‚。自分ã®éœ€è¦ã«ã¯ã‚ã‚ãªã„æ„Ÿã˜ã§ã—ãŸã€‚ 勉強会ãŒçµ‚ã‚ã£ãŸã‚ã¨ã§ã€è‡ªä½œã®ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—スクリプト blockdiff ã«é–¢ã™ã‚‹è©±ã‚’何人ã‹ã®æ–¹ã¨ã•ã›ã¦ã„ãŸã ã„ãŸã®ã§ã™ãŒã€æ€ã„ã®ã»ã‹åå¿œãŒè‰¯ã‹ã£ãŸã®ã§ã€ã‚らãŸã‚ã¦ç´¹ä»‹ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ blockdiff ã¯ã€ä¸€è¨€ã§ã„ã†ã¨ã€ãƒ‘ーティションやデータベースã®ãƒ‡ãƒ¼ã‚¿ãƒ•ã‚¡ã‚¤ãƒ«ã®å·®åˆ†ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ツールã§ã™ã€‚rsnapshot ã«ä¼¼ã¦ã„ã¾ã™ãŒã€rsnapshot ã§ã¯ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®ãƒ›ãƒƒãƒˆãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ä¸å¯èƒ½ã§ã™ã€‚逆㫠blockdiff ã¯ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªå˜ä½ã§ã®ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ã«ã¯å¯¾å¿œã—ã¦ã„ãªã„ã‹ã‚ã‚Šã€ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ やデータベースをã€ä¸€è²«æ€§ã‚’ä¿ã¡ã¤ã¤å®Ÿè³ªç„¡åœæ¢ã§å·®åˆ†ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™
nopan ã£ã¦ã„ã†ãƒ¬ãƒã‚¸ãƒˆãƒªã‹ã‚‰ç›´æŽ¥ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ã‚’インストールã™ã‚‹ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ©ã‚’作り始ã‚ãŸä»¶ - kazuhoã®ãƒ¡ãƒ¢ç½®ãå ´
perl ã®å ´åˆã€CPAN モジュール㯠sudo cpan -i Module ã®ï¼‘コマンドã§ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã§ãる。ã§ã‚‚ã€svn ã‚„ git レãƒã‚¸ãƒˆãƒªã®ã‚³ãƒ¼ãƒ‰ã¯ã€ãƒã‚§ãƒƒã‚¯ã‚¢ã‚¦ãƒˆã—㦠perl Makefile.PL && make all test && sudo make install ã¨ã‹ã€ã‚ã‚“ã©ãã•ã„。 ãªã®ã§ã€svn ã‚„ git レãƒã‚¸ãƒˆãƒªã‹ã‚‰ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’ダウンãƒãƒ¼ãƒ‰ã—ã¦ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã™ã‚‹ãƒ„ールを作り始ã‚ãŸã€‚åå‰ã¯ã€CPAN モジュール以外も簡å˜ã«ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã§ãã‚‹ã¨ã“ã‚ã‹ã‚‰ã€Not-only CPANã€ç•¥ã—㦠nopan。 ã“ã‚“ãªæ„Ÿã˜ã§å‹•ãã¾ã™ã€‚ã¾ã é©å½“ã ã‘ã©ã€‚ $ sudo nopan http://github.com/kazuho/kaztools.git downloading files from URL:http://github.com/kazuho/kazto
(特ã«MyISAMを使ã£ã¦ã„ãŸ)ウェブ屋ã•ã‚“ãŒInnoDBを使ã†å ´åˆã®è¨å®šé …ç›® - kazuhoã®ãƒ¡ãƒ¢ç½®ãå ´
InnoDBã¯MyISAMã¨æ¯”較ã—ã¦å®‰å…¨(OSクラッシュや電æºæ–ãŒç™ºç”Ÿã—ã¦ã‚‚テーブルãŒå£Šã‚Œãªã„)分ã€æ›¸ãè¾¼ã¿ãŒé…ã„。データベース屋ã•ã‚“ã‹ã‚‰ã™ã‚‹ã¨ã€ãã‚Œã¯å½“然ã®ã“ã¨ã§MyISAMãŒãŠã‹ã—ã„ã‚“ã ã€ã¨ã„ã†ã“ã¨ã«ãªã‚Šã€ã ã‹ã‚‰ãƒãƒƒãƒ†ãƒªãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—機能ã®ã¤ã„ãŸRAIDカードを使ã†ã‚“ã ã€ã¨ã„ã†è©±ã«ãªã‚‹ã€‚ã§ã‚‚ã€MyISAMを使ã£ã¦ã„るウェブ屋ã•ã‚“ã®ç¾å ´ã§ã¯ã€å ´åˆã«ã‚ˆã£ã¦å¤šå°‘データãŒæ¶ˆãˆã¦ã‚‚ã‹ã¾ã‚ãªã„ã‹ã‚‰ã€å®‰ã„ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã§å¤§é‡ã®ã‚¢ã‚¯ã‚»ã‚¹ã‚’æŒããŸã„... ã£ã¦ä¹–離ãŒã‚ã‚‹ã‚“ã˜ã‚ƒãªã„ã‹ãªãƒ¼ã¨æ€ã£ã¦ã‚‹ã€‚ ãã®ã‚ˆã†ãªå ´åˆã«ã¯ã€my.cnf ã® innodb_flush_log_at_trx_commit パラメータを調整ã™ã‚‹ã“ã¨ã§ã€MyISAMã«æ¯”è‚©ã™ã‚‹æ›¸ãè¾¼ã¿é€Ÿåº¦ã‚’å¾—ã‚‹ã“ã¨ãŒã§ãã‚‹(ãã®ã‹ã‚ã‚Šã€ã‚¯ãƒ©ãƒƒã‚·ãƒ¥ã‚„é›»æºæ–ã®å ´åˆã¯ã€è¨å®šã«ã‚ˆã£ã¦ç›´è¿‘１秒以内ã®å¤‰æ›´ãŒå¤±ã‚れる)。 ä»–ã®ãƒ‘ラメータもå«ã‚ã¦æ›¸ã„ã¦ãŠãã¨ã€ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼
(Min|Max)SpareServers ã«ã‹ã‚ã‚‹ prefork モデルを考ãˆã¦ã¿ã‚‹ - kazuhoã®ãƒ¡ãƒ¢ç½®ãå ´
ãã‚‚ãã‚‚å‹•çš„ã«ãƒ—ãƒã‚»ã‚¹æ•°ã‚’変化ã•ã›ã‚‹ã“ã¨ãŒã§ãã¦ä½•ãŒã†ã‚Œã—ã„ã‹ã€ã¨ã„ã†ã¨ã€è² è·ãŒè»½ã„時ã«ã€åˆ¥ã®ã‚¿ã‚¹ã‚¯ã‚’å‹•ã‹ã—ã¦ã‚‚ã€ã‚¢ã‚¤ãƒ‰ãƒ«çŠ¶æ…‹ã®ã‚µãƒ¼ãƒãƒ—ãƒã‚»ã‚¹ãŒé‚ªé”ã«ãªã‚‰ãªã„。ã£ã¦ã‚ãŸã‚Šãªã®ã‹ãªã€‚ã§ã‚‚ãã®ãŸã‚（ã ã‘）㫠Scoreboard ã¨ã‹è¤‡é›‘ãªä»•çµ„ã¿ã‚’用æ„ã™ã‚‹ã®ã¯ãªã‚“ã ã‹ãªãƒ¼ã¨æ€ã£ãŸã‚Šã€‚ ＃scoreboard 自体ã«ã¯ mod_status ã¿ãŸã„ãªä½¿ã„方もã‚ã‚‹ã‘㩠一方ã§ã€(Min|Max)SpareServers æ–¹å¼ã«ã¯ã€è² è·ã®å¢—大局é¢ã§ fork(2) ãŒç™ºç”Ÿã™ã‚‹ã¨ã„ã†å¥½ã¾ã—ã‹ã‚‰ã–ã‚‹å•é¡Œã‚‚ã‚ã£ãŸã‚Šã™ã‚‹ã€‚ ＃特ã«ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯çµæžœã«æ‚ªå½±éŸ¿ãŒå‡ºã‚‹ :-p ã˜ã‚ƒã‚プãƒã‚»ã‚¹æ•°ã‚’固定ã—ãŸã¾ã¾ã€è² è·ãŒè»½ã„éš›ã«ä½™è¨ˆãªãƒªã‚½ãƒ¼ã‚¹ã‚’食ã‚ãªã„よã†ãªè¨è¨ˆãŒã§ããªã„ã‹ã€‚ã§ãã‚‹ã‚“ã˜ã‚ƒãªã„ã‹ãªãƒ¼ã€ã¨ã„ã†ã®ãŒæœ¬é¡Œã€‚具体的ã«ã¯ã€ accept(2) ã«ã¯ã€å¿…ãš mutex lock ã‚’ã‹ã‘ã‚‹ mutex ã‚’ãƒãƒƒã‚¯ã§ããªã‹ã£
Kazuho@Cybozu Labs: パフォーマンスã¨ã‚¹ã‚±ãƒ¼ãƒ©ãƒ“リティã®ãŸã‚ã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚¢ãƒ¼ã‚テクãƒãƒ£ (BPStudy#25発表資料)
先週金曜日ã€BPStudy#25ã§ã€ã€Œãƒ‘フォーマンスã¨ã‚¹ã‚±ãƒ¼ãƒ©ãƒ“リティã®ãŸã‚ã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚¢ãƒ¼ã‚テクãƒãƒ£ã€ã¨ã„ã†é¡Œç›®ã§è©±ã‚’ã•ã›ã¦ã„ãŸã ãã¾ã—ãŸã€‚ãã®éš›ã«ä½¿ç”¨ã—ãŸç™ºè¡¨è³‡æ–™ã¯ä»¥ä¸‹ã®ã¨ãŠã‚Šã§ã™ã€‚ 1. Happy Optimization 最åˆã«ã€æœ€é©åŒ–ã®è€ƒãˆæ–¹ã¨ã—ã¦ã€ä¸Šé™å€¤ã‚’予測ã—ã€ãれを元ã«ãƒªã‚½ãƒ¼ã‚¹é…分を考ãˆã‚‹ã€ã¨ã„ã†æ‰‹æ³•ã‚’説明ã—ã¾ã—ãŸã€‚
bpstudy25 #1, bpstudy25 #1 gihyojp on USTREAM. Conference
Not rated yet. You must be logged in to rate this video.
Kazuho@Cybozu Labs: 「サーãƒæ›¸ããªã‚‰ epoll 使ã†ã¹ãã€ã¯ã€ä»Šã§ã‚‚æ£ã—ã„ã®ã‹
多数ã®TCP接続をãƒãƒ³ãƒ‰ãƒªãƒ³ã‚°ã™ã‚‹ã‚µãƒ¼ãƒã‚’書ããªã‚‰ã€1コãƒã‚¯ã‚·ãƒ§ãƒ³1スレッドã®ãƒ¢ãƒ‡ãƒ«ã§ã¯ãªãã€epollã‚„kqueueã®ã‚ˆã†ãªã‚¤ãƒ™ãƒ³ãƒˆé§†å‹•åž‹ã®I/O多é‡åŒ–ã‚’è¡Œã†ã¹ãã ã€ã¨è¨€ã‚ã‚Œã¾ã™ã€‚ã ãŒã€ãã®ã‚ˆã†ãªä¸»å¼µã¯ã€ã€ŒC10Kå•é¡Œã€ãŒæ›¸ã‹ã‚ŒãŸ2002å¹´ã‹ã‚‰7年経éŽã—ãŸä»Šã§ã‚‚有効ãªã®ã§ã—ょã†ã‹ï¼Ÿã€€echoサーãƒã‚’書ã„ã¦ã€ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã‚’å–ã£ã¦ã¿ã‚‹ã“ã¨ã«ã—ã¾ã—ãŸã€‚ ãµãŸã¤ã®ã‚°ãƒ©ãƒ•ã¯ã€ã„ãšã‚Œã‚‚接続数ã¨ã‚¹ãƒ«ãƒ¼ãƒ—ットã®é–¢ä¿‚を表ã—ã¦ã„ã¾ã™ã€‚最åˆã®ã‚°ãƒ©ãƒ•ã¯ã€å…¨æŽ¥ç¶šãŒã‚¢ã‚¯ãƒ†ã‚£ãƒ–ã«é€šä¿¡ã—ãŸå ´åˆã€ã‚ã¨ã®ã‚°ãƒ©ãƒ•ã¯ã€å…¨æŽ¥ç¶šã®ã†ã¡å°æ•°ã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒé †æ¬¡ã‚¢ã‚¯ãƒ†ã‚£ãƒ–ã«ãªã£ã¦ã„ãã€ã¨ã„ã†ãƒ¢ãƒ‡ãƒ«ã§ã™ã€‚ã“れらã®ã‚°ãƒ©ãƒ•ã‹ã‚‰ã€ä»¥ä¸‹ã‚ˆã†ãªã“ã¨ãŒèªã¿å–ã‚Œã¾ã™ã€‚ epoll ã‚‚ per-thread モデルもã€è‰¯ãスケールã™ã‚‹ epoll ã¯ã€ãƒ¯ãƒ¼ã‚¯ã‚»ãƒƒãƒˆãŒå°ã•ã„å ´åˆã« (最大50%) per-thread モデルよりも高速 å°‘ãªãã¨ã‚‚ã€1コãƒ
アプリケーションサーãƒã§éžåŒæœŸå‡¦ç†ã‚’ã™ã‚‹ã‹ã—ãªã„ã‹ã®åˆ†æ°´å¶º - kazuhoã®ãƒ¡ãƒ¢ç½®ãå ´
mala ã•ã‚“ã®ã¾ã¨ã‚ã¯ã€ã‚ã‹ã‚Šã‚„ã™ã„ãªãã¨æ€ã„ã¾ã—ãŸã€‚ãŸã ã€å‚è«–ãªã‚“ã§ã™ãŒã€ æ—¢å˜ã®ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰/マルãƒãƒ—ãƒã‚»ã‚¹ã®ã‚µãƒ¼ãƒãƒ¼ã§ã€å¸¸ã«ãƒªã‚¯ã‚¨ã‚¹ãƒˆå‡¦ç†å¾…ã¡ã®å¾…æ©Ÿã—ã¦ã„るプãƒã‚»ã‚¹ãŒã‚る状態ã®å ´åˆã¯(+ãã®ä¸¦åˆ—æ•°ã§CPUã®ãƒ‘フォーマンスãŒåŠ£åŒ–ã—ãªã„å ´åˆã¯)ã€ãƒ‘フォーマンスãŒåŠ£åŒ–ã™ã‚‹ã“ã¨ã¯ç„¡ã„ã®ã§éžåŒæœŸå‡¦ç†ã‚’使ã†å¿…è¦ãŒç„¡ã„ã§ã—ょã†ã€‚実際ã®ã¨ã“ã‚「1秒ã‚ãŸã‚Šã«æ¥ã‚‹ãƒªã‚¯ã‚¨ã‚¹ãƒˆã®æœ€å¤§ä»¶æ•°ã€ã¨ã„ã†ã®ã¯äºˆæ¸¬ã§ããªã„ã®ã§ã€(long-pollã‚„streamingã‚’ã—ãªã„)普通ã®ã‚¢ãƒ—リケーションã«ãŠã„ã¦ã‚‚éžåŒæœŸå‡¦ç†ã®å°Žå…¥ã¯ãƒ¡ãƒªãƒƒãƒˆã«ãªã‚‹(ã¨ã€è€ƒãˆã¦ã„ã‚‹)。 éžåŒæœŸã‚¢ãƒ—リケーションサーãƒãƒ¼ã®è¦ä»¶ã¨å¿…è¦æ€§ã«ã¤ã„㦠- 金利0無利æ¯ã‚ャッシング – ã‚ャッシングã§ãã¾ã™ - subtech ã¯ã¡ã‚‡ã£ã¨æ°—ã«ãªã£ãŸã€‚ç§è¦‹ã§ã¯ã€éžåŒæœŸå‡¦ç† (スレッド内ã§ã® I/O 多é‡åŒ–) ã‚’è¡Œã†ã¹ãã‹å¦ã‹ã€ã¯ã€ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã¨ã® TCP
コンピュータã¯å‰µé€ 力を刺激ã™ã‚‹ã€€å¥¥ä¸€ç©‚ã•ã‚“ã®ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãƒ©ã‚¤ãƒ•ï¼ˆ1/2） - 特集：No okyuu, No Life [okyuu.com]
コンピュータã¯å‰µé€ 力を刺激ã™ã‚‹ 奥一穂ã•ã‚“ã®ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãƒ©ã‚¤ãƒ•ï¼ˆ1/2） 「コンピュータã¯è‡ªåˆ†ã®è€ƒãˆã‚’ダイレクトã«è©¦ã›ã‚‹ã€â€•â€•å¤©æ‰ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã¨ã—ã¦å›½éš›çš„ãªè©•ä¾¡ã‚‚高ã„サイボウズ・ラボã®å¥¥ä¸€ç©‚ã•ã‚“ã¯ç¬‘é¡”ã§èªžã‚‹ã€‚世間ã‹ã‚‰ã®ã‚¹ãƒžãƒ¼ãƒˆã ã¨ã®è©•ä¾¡ã«ã¯ã€Œè‡ªåˆ†ã¯åºƒãæµ…ãã ã‹ã‚‰ã€ã¨ã•ã‚‰ã‚Šã€‚ ã“ã®ä¼ç”»ã¯okyuu.com編集部ãŒç¾åœ¨ã®ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢åƒã‚’リレー形å¼ã§è¿½ã£ã¦ã„ãã‚‚ã®ã§ã™ã€‚ （å–æ・文ï¼ç·¨é›†éƒ¨ï¼‰ 奥一穂（ãŠãã‹ãšã»ï¼‰ 1977å¹´2月21日生 32æ³ã€€ã‚µã‚¤ãƒœã‚¦ã‚ºãƒ»ãƒ©ãƒœ ã€ç•¥æ´ã€‘ 1997å¹´ Palm OS 用Webブラウザ「Palmscapeã€é–‹ç™º 1999å¹´ æ±äº¬å¤§å¦ä¸é€€ã€æ ªå¼ä¼šç¤¾ã‚¤ãƒªãƒ³ã‚¯ã‚¹å…¥ç¤¾ 2002å¹´ M.I.T. Technology Review誌ã®TR100ã«é¸å‡º 2003å¹´ æ ªå¼ä¼šç¤¾ãƒ¢ãƒ“ラス　代表å–ç· å½¹å°±ä»» 2004å¹´ IPA「未è¸ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢å‰µé€ 事æ¥ã€æŽ¡æŠž 2005å¹´ IP
Kazuho@Cybozu Labs: Picoev: a tiny event loop for network applications, faster than libevent or libev
I am sure many programmers writing network applications have their own abstracting layers hiding the differences between various I/O multiplex APIs, like select(2), poll(2), epoll(2), ... And of course, I am one among them. While writing mycached (see Mycached: memcached protocol support for MySQL for more information), I was at first considering of using libev for multiplexing socket I/Os. Libe
Kazuho at Work: Benchmarking SSD for MySQL
Today I bought Intel X25-M, to test its performance and consider if we could replace a HDD used in our slave database of Pathtraq with a solid state disk. Connecting the drive to a test server, I have just run a synthetic benchmark to check its performance for 16KB random access with O_DIRECT flag set, which is pretty similar to the access pattern we see in our daily InnoDB use.
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
Webアプリケーションã®ç„¡åœæ¢ç¨¼åƒ - Server::Starter, Parallel::Prefork, Starlet を使ã£ã¦ (SoozyConference 7 発表資料)
WesternDigital製HDDå‹ã®ä¼š Vol.92
https://labs.cybozu.co.jp/blog/kazuho/archives/2008/05/blockdiff.php
https://labs.cybozu.co.jp/blog/kazuho/archives/2008/03/fastr.php
{{#tags}}- {{label}}
{{/tags}}