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linuxã¨Linuxã«é–¢ã™ã‚‹iqmã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (261)

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Linux Storage Filesystem/MM Summit 2014ã‹ã‚‰ã®ä¾¿ã‚Š
Linux Storage Filesystem/MM Summit 2014ã‹ã‚‰ã®ä¾¿ã‚Šï¼šLinux Kernel Watchï¼ˆ1/2 ãƒšãƒ¼ã‚¸ï¼‰ ãŠä¹…ã—ã¶ã‚Šã§ã™ã€Linux Kernel WatchãŒå¸°ã£ã¦ãã¾ã—ãŸã€‚3æœˆã«è¡Œã‚ã‚ŒãŸã€ŒLinux Storage Filesystem/MM Summit 2014ã€ã®ä¸»ãªãƒˆãƒ”ãƒƒã‚¯ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ çš†ã•ã‚“ã€ãŠä¹…ã—ã¶ã‚Šã§ã™ã€‚ç§ã¯ä»Šãƒœã‚¹ãƒˆãƒ³ã§ã€ç±³ãƒ¬ãƒƒãƒ‰ãƒãƒƒãƒˆå¸¸é§ã¨ã„ã†ç«‹å ´ã§Red Hat Enterprise Linuxï¼ˆRHELï¼‰é–‹ç™ºã«æºã‚ã£ã¦ã„ã¾ã™ã€‚ ä»Šå›žã¯ã‚µãƒ³ãƒ•ãƒ©ãƒ³ã‚·ã‚¹ã‚³è¿‘éƒŠã®ãƒŠãƒ‘ãƒãƒ¬ãƒ¼ã§2014å¹´3æœˆ24ï½ž25æ—¥ã«è¡Œã‚ã‚ŒãŸã€ŒLinux Storage Filesystem/MM Summit 2014ã€ï¼ˆä»¥ä¸‹LSF/MMï¼‰ã®ä¸ã‹ã‚‰é¢ç™½ã‹ã£ãŸãƒˆãƒ”ãƒƒã‚¯ã‚’ãƒ”ãƒƒã‚¯ã‚¢ãƒƒãƒ—ã—ã¦ãŠå±Šã‘ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ LSF/MMã¯Linux Foundationä¸»å‚¬ã§è¡Œ
iqm 2014/04/24
linux
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iqm 2014/03/13
linux
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ã‚³ãƒ³ã‚½ãƒ¼ãƒ«ã‹ã‚‰åˆ‡ã‚ŒãŸãƒ—ãƒã‚»ã‚¹ã‚’æ¨™æº–å‡ºåŠ›ã«ã¤ãªã’ãªãŠã™ - çµ¶å“ã‚†ã©ã†ãµã®ã‚¿ãƒ¬
ä¸æ…£ã‚Œãªç’°å¢ƒã‚’ä¸æ„ã«ã„ã˜ã£ãŸæ™‚ã«ã‚ã‚‹ã‚ã‚‹ãƒã‚¿ã€‚ ã¨ã‚Šã‚ãˆãšãƒ¼ ã¨ã‹è¨€ã£ã¦å‹¢ã„ã§æ›¸ã„ãŸsetupã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚’å®Ÿè¡Œã—ã¦ã¿ãŸã‚‰æ„å¤–ã¨æ™‚é–“ã‹ã‹ã£ã¦ã€ ã¡ã‚‡ã£ã¨ç›®ã‚’é›¢ã—ãŸéš™ã«sshã®æŽ¥ç¶šãŒåˆ‡ã‚Œã¡ã‚ƒã„ã¾ã—ãŸï¼ ã€‚ã€‚ã€‚ã‚ã‚Šã¾ã™ã‚ˆãã€‚ã»ã‚“ã¨ã‚ˆãã‚ã‚Šã¾ã™ã‚ˆãã€‚ ãã†ãªã‚‹äºˆæ„Ÿã¯ã‚ã£ãŸã‚“ã ãªã‚“ã¦å¾Œã®ç¥ã‚Šã§ã™ã€‚ãµã¨ã—ãŸæ²¹æ–ã‹ã‚‰ã€screenã‚‚nohupã™ã‚‰ã‚‚ä½¿ã‚ãšã«ã‚„ã£ã¦ã—ã¾ã£ã¦ã€ã“ã‚“ãªã“ã¨ã«ã€‚ shellãŒHUPã—ãªã‹ã£ãŸã‹ã‚‰ãƒ—ãƒã‚»ã‚¹ã¯ç”Ÿãã¦ã‚‹ã‚‚ã®ã®ã€ãƒã‚°ãŒè¦‹ã‚Œãªã„ã‹ã‚‰é€²è¡ŒçŠ¶æ³ãŒã‚ã‹ã‚‰ãªã„ã€‚ ã†ã¾ãè¡Œã£ã¦ã‚‹ã®ã‹ã©ã†ã‹ãƒ¢ãƒ¤ãƒ¢ãƒ¤ã—ãŸæ°—æŒã¡ã®ã¾ã¾ã€ãƒ—ãƒã‚»ã‚¹ãŒçµ‚ã‚ã‚‹ã®ã‚’ã˜ã£ã¨å¾…ã¤ã€‚ã€‚ã€‚ ã¾ãå®Ÿã«åˆ‡ãªã„ã§ã™ã€‚ ã“ã‚“ãªæ™‚ã€ã„ã¤ã‚‚æ€ã†ã“ã¨ã€‚ ã“ã®ãƒ—ãƒã‚»ã‚¹ã®å‡ºåŠ›ã€ã‚‚ã£ã‹ã„stdoutã«ç¹‹ã’ã‚‰ã‚ŒãŸã‚‰ã„ã„ã®ã«ã€‚ã€‚ã€‚ ã¯ã„ã€‚ã¨ã„ã†ã‚ã‘ã§ã¤ãªã’ã¾ã—ã‚‡ã†ã€‚ é•·ã„å‰åº§ã§ã™ã¿ã¾ã›ã‚“ã€‚ åˆ‡ã‚Šé›¢ã—ãŸãƒ—ãƒã‚»ã‚¹ã‚’ç”¨æ„ #!/bin/bash wh
iqm 2014/02/06
linux
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Linuxæ¨™æº–æ•™ç§‘æ›¸2.0.0ã‚’èªã‚“ã - rochefort's blog
è‡ªåˆ†ã«ã¯ã‚‚ã†å¿…è¦ãªã„ã‹ã‚‚ã¨æ€ã„ãªãŒã‚‰ç©èªçŠ¶æ…‹ã ã£ãŸ Linuxæ¨™æº–æ•™ç§‘æ›¸ ã‚’èªã¿ã¾ã—ãŸã€‚ ä»¥å¤–ã¨çŸ¥ã‚‰ãªã„ã“ã¨ã‚‚ã‚ã‚Šå‹‰å¼·ã«ãªã‚Šã¾ã—ãŸã€‚ åŸºç¤Žå¤§äº‹ã€‚ shellã®ãƒ‡ãƒãƒƒã‚°(sh -x) : 9.8 ãƒ‡ãƒãƒƒã‚°(P.177) æ–°äººã®é ƒshellã‚’æ›¸ãã¾ãã£ã¦ã€print debugã—ã¾ãã£ã¦ãŸè‡ªåˆ†ã«æ•™ãˆã¦ã‚ã’ãŸã„ã€‚ ä¾‹ã¨ã—ã¦åˆ†ã‹ã‚Šã«ãã„ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ãŒã€ -x ã‚’ã¤ã‘ã¦å®Ÿè¡Œã™ã‚‹ã¨ ã‚³ãƒžãƒ³ãƒ‰ã‚„å¤‰æ•°ã®ä¸èº«ã‚’è¡¨ç¤ºã—ãªãŒã‚‰å®Ÿè¡Œã—ã¦ãã‚Œã¾ã™ã€‚ sampleã¨ã—ã¦ã¯è‹¥å¹²è¦‹ã«ãã„ã‹ã‚‚ã—ã‚Œãªã„ã§ã™ãŒ $ cat samle.sh while true do echo "Continue? (y/n)" read input case $input in n) break ;; y) continue ;; *) echo "Please input y or n." ;; esac done ã“ã‚Œã‚’ -xã€€ä»˜ãã§
iqm 2014/01/29
linux

shell
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Linuxã‚«ãƒ¼ãƒãƒ«3.13ãƒªãƒªãƒ¼ã‚¹ã€nftablesã‚„ãƒ–ãƒãƒƒã‚¯ãƒ‡ãƒã‚¤ã‚¹ãƒ¬ã‚¤ãƒ¤ãƒ¼ã®æ”¹è‰¯ãªã©ãŒç‰¹å¾´ | OSDN Magazine
Linus Torvaldsæ°ã¯1æœˆ19æ—¥ã€ã€ŒLinuxã‚«ãƒ¼ãƒãƒ«3.13ã€ã‚’ãƒªãƒªãƒ¼ã‚¹ã—ãŸã€‚å¤§ããªå¤‰æ›´ç‚¹ã¨ã—ã¦ã¯ãƒ‘ã‚±ãƒƒãƒˆãƒ•ã‚£ãƒ«ã‚¿ãƒªãƒ³ã‚°æ©Ÿèƒ½ã€Œiptablesã€ã®å¾Œç¶™ã¨ãªã‚‹ã€Œnftablesã€ã®ãƒžãƒ¼ã‚¸ã‚„ã€SSDãªã©ã®é«˜é€Ÿãƒ‡ãƒã‚¤ã‚¹ã‚’è€ƒæ…®ã—ãŸã‚¹ã‚±ãƒ¼ãƒ©ãƒ–ãƒ«ãªãƒ–ãƒãƒƒã‚¯ãƒ‡ãƒã‚¤ã‚¹ãƒ¬ã‚¤ãƒ¤ãƒ¼ã®å°Žå…¥ãªã©ãŒæŒ™ã’ã‚‰ã‚Œã‚‹ã€‚ 11æœˆåˆã‚ã«å…¬é–‹ã•ã‚ŒãŸãƒãƒ¼ã‚¸ãƒ§ãƒ³3.12ã‹ã‚‰ç´„11é€±é–“ã§ã®æ–°ãƒãƒ¼ã‚¸ãƒ§ãƒ³å…¬é–‹ã¨ãªã‚Šã€åˆå›žã®ãƒªãƒªãƒ¼ã‚¹å€™è£œï¼ˆRCï¼‰ç‰ˆãŒ11æœˆæœ«ã«å…¬é–‹ã•ã‚Œã¦ä»¥æ¥ã€åˆè¨ˆ8å›žã®RCãƒªãƒªãƒ¼ã‚¹ã‚’çµŒã¦æ£å¼ç‰ˆãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚ŒãŸã€Torvaldsæ°ã«ã‚ˆã‚‹ã¨ã€ã€Œæ—…è¡ŒãŒã‚ã£ãŸãŸã‚ã«ãƒªãƒªãƒ¼ã‚¹ãŒ1é€±é–“é…ã‚ŒãŸã€ã¨ã„ã†ã€‚ ä»Šå›žã®ãƒªãƒªãƒ¼ã‚¹ã«ãŠã‘ã‚‹é‡è¦ãªå¤‰æ›´ç‚¹ã¨ã—ã¦ã¯ã€ã¾ãšSSDã‚’è¦–é‡Žã«ã„ã‚ŒãŸã‚¹ã‚±ãƒ¼ãƒ©ãƒ–ãƒ«ãªãƒ–ãƒãƒƒã‚¯ãƒ‡ãƒã‚¤ã‚¹ãƒ¬ã‚¤ãƒ¤ãƒ¼ã®å°Žå…¥ãŒæŒ™ã’ã‚‰ã‚Œã¦ã„ã‚‹ã€‚I/Oå—ä»˜ã®ãŸã‚ã®CPUå˜ä½ã§ã®ã‚ãƒ¥ãƒ¼ã¨ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢å‘ã‘ã®ã‚ãƒ¥ãƒ¼ã¨ã„ã†2ãƒ¬ãƒ™ãƒ«ã§ã®ã‚ãƒ¥ãƒ¼æ§‹é€ ã‚’æŒã¡ã€
iqm 2014/01/22
linux

kernel

nftables
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Linux ã® ext4 ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã§é–“é•ã£ã¦ä¸Šæ›¸ãã—ãŸãƒ•ã‚¡ã‚¤ãƒ«ã‚’å¾©æ—§ã•ã›ãŸ - éˆ´æœ¨ã†ã©ã‚“ã®æ¨ªé ˆè³€ãŠã‚‚ã—ã‚ç”Ÿæ´»
çµè«– ext4magic æœ€é«˜ï¼ï¼ï¼ï¼ï¼‘ï¼‘ï¼‘ ã‚„ã£ãŸã“ã¨ % ext4magic â€œãƒ‡ãƒã‚¤ã‚¹åã«â€ -r -a â€œã“ã®unixtimeã‹ã‚‰â€ã€€-b â€œã“ã®unixtimeã¾ã§å˜åœ¨ã—ã¦ã„ãŸâ€ -f â€œã“ã®ãƒ•ã‚¡ã‚¤ãƒ«åã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚’å¾©æ—§ã™ã‚‹â€ å®Ÿä¾‹ /dev/md0 ä¸Šã®æ˜¨æ—¥ã®20:00ã‹ã‚‰20:30ã®é–“ã¾ã§å˜åœ¨ã—ã¦ã„ãŸ udonchan/backup.tar ã‚’å¾©æ—§ã•ã›ãŸã„ % ext4magic /dev/md0 -r -a $(date -d "-1day 20:00 +%s") -b $(date -d â€œ-1day 20:30 +%s) -f "udonchan/backup.tar" ã©ã†ã—ã¦ã“ã†ãªã£ãŸ å¹´æœ«ãªã®ã§ OSX ã‚’ã‚¯ãƒªãƒ¼ãƒ³ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—ã‚ˆã†ã¨ã—ã¦ ~ ã‚’ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ã—ãŸãŒé–“é•ã£ã¦ä¸Šæ›¸ãã—ã¦æ¶ˆã—ãŸã€‚ å…·ä½“çš„ã«ï¼Ÿ ~ ã‚’ã‚µãƒ¼ãƒä¸Šã«ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ã™ã‚‹ãœ % tar cf -C /U
iqm 2013/12/28
linux

filesystem
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Linuxã®TCP SYNã®å†é€é–“éš”ã®åˆæœŸå€¤ãŒ3ç§’ã‹ã‚‰1ç§’ã«å¤‰æ›´ã•ã‚Œã¦ã„ãŸ - å…ƒRX-7ä¹—ã‚Šã®é©å½“ãªæ—¥ã€…
ã¨ã„ã†ã“ã¨ã«ã€(ä»Šæ›´ï¼Ÿ)æ°—ä»˜ã„ãŸãŠè©±ã§ã™ã€‚ HAã‚’çµ„ã‚“ã éš›ã®VIPã®åˆ‡ã‚Šæ›¿ãˆãƒ†ã‚¹ãƒˆã‚’ã‚„ã£ã¦ã„ã‚‹ã¨ãã«ã€é«˜è² è·æ™‚ã¨ã‹ã¯åˆ‡ã‚Šæ›¿ãˆã«7ç§’ã´ã£ãŸã‚Šã‹ã‹ã‚‹ã‚±ãƒ¼ã‚¹ã¨ã‹ãŒã‚ã£ã¦ã€7ç§’ã£ã¦ä½•ã®æ•°å—ã ã‚ã†ã¨ç–‘å•ã‚’æŒã¡ã¾ã—ãŸã€‚ OSã¯ã€CentOS 6.4(2.6.32-358.23.2.el6.x86_64)ã§ã™ã€‚ TCP SYNã®å†é€é–“éš”ãŒã€1...2...4...ç§’ã«ãªã£ã¦ã„ã‚‹ ã§ã€tcpdumpã‚’çœºã‚ã¦ã„ã‚‹ã¨ä»¥ä¸‹ã®ã‚ˆã†ãªã‚·ãƒ¼ã‚±ãƒ³ã‚¹ã§ã™ã€‚ 11:50:35.689301 IP client-host.8957 > server-host.http: Flags [S], seq 1616681830, win 14600, options [mss 1460,sackOK,TS val 889880946 ecr 0,nop,wscale 7], length 0 11:50:36.688503 IP
iqm 2013/11/29
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linux

kernel

TCP

network
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Use multiple CPU Cores with your Linux commands - awk, sed, bzip2, grep, wc, etc. - RankFocus - Systems and Data
iqm 2013/10/31
linux

shell
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MultiPath TCP - Linux Kernel implementation : Main - Home Page browse
iqm 2013/10/11
TCP

linux
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Google Sites: Sign-in
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iqm 2013/08/27
linux

kvm
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ç¾å ´ã§å½¹ã«ç«‹ãŸãªã„sudoã®ä½¿ã„æ–¹
2. sudo ã¨ã¯ â— sudo â€œï¼ˆ su doâ€ ï¼‰ã¯ UNIX ãŠã‚ˆã³ Unix ç³»ã‚ªãƒš ãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã® 1 ã¤ã§ã€ ãƒ¦ãƒ¼ã‚¶ãƒ¼ãŒåˆ¥ã®ãƒ¦ãƒ¼ã‚¶ãƒ¼ï¼ˆé€šå¸¸ã€ã‚¹ãƒ¼ãƒ‘ãƒ¼ãƒ¦ãƒ¼ ã‚¶ãƒ¼ã™ãªã‚ã¡ root ï¼‰ã®ç‰¹æ¨©ãƒ¬ãƒ™ãƒ«ã§ãƒ—ãƒã‚°ãƒ© ãƒ ã‚’å®Ÿè¡Œã™ã‚‹ãŸã‚ã®ã‚³ãƒžãƒ³ãƒ‰ã§ã‚ã‚‹ã€‚ å‡ºå…¸ï¼š http://ja.wikipedia.org/wiki/Sudo 2 / 30
iqm 2013/06/29
linux
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ãƒãƒœãƒƒãƒˆã®è‚²ã¦æ–¹:ã€Tipsã€‘ã‚¸ãƒ§ãƒ–ã®ç®¡ç†ï¼ˆnohup, disown, ä¸€æ™‚åœæ¢ãƒ»å†é–‹ï¼‰ã€Linuxã€‘ - livedoor Blogï¼ˆãƒ–ãƒã‚°ï¼‰
linux(bash)ã§ãƒã‚°ã‚¢ã‚¦ãƒˆã—ã¦ã‚‚ã‚¸ãƒ§ãƒ–ã‚’åœæ¢ã—ãŸããªã„ã¨ãï¼Ž $ nohup ./program nohupã—å¿˜ã‚Œã¦é€”ä¸ã‹ã‚‰nohupã—ãŸã„ã¨ãï¼Œ ï¼ˆã‚¸ãƒ§ãƒ–ç•ªå·ã‚’1ã¨ã™ã‚‹ï¼‰ $ disown %1ã“ã‚Œã§ï¼Œshellã®ã‚¸ãƒ§ãƒ–ç®¡ç†ã‹ã‚‰åˆ‡ã‚Šé›¢ã•ã‚Œã‚‹ã®ã§ ãƒã‚°ã‚¢ã‚¦ãƒˆã—ã¦ã‚‚ã‚¸ãƒ§ãƒ–ã¯å®Ÿè¡Œã•ã‚Œç¶šã‘ã‚‹ï¼Ž ã“ã®æ™‚ï¼Œã‚³ãƒžãƒ³ãƒ‰ã‚’bgã§ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ã‚¸ãƒ§ãƒ–ã«ã—ã¦ãŠã‹ãªã„ã¨ åœæ¢ã—ãŸã¾ã¾ï¼Œshellã®ç®¡ç†ã‚’é›¢ã‚Œã¦ã—ã¾ã†ï¼Ž ãã“ã§killã‚³ãƒžãƒ³ãƒ‰ã§ãƒ—ãƒã‚»ã‚¹ã«CONTã‚·ã‚°ãƒŠãƒ«ã‚’é€ã‚‹ã¨å†é–‹ã™ã‚‹ï¼Ž $ kill -CONT pidé€†ã«ç›´æŽ¥ç®¡ç†ä¸‹ã«ãªã„ãƒ—ãƒã‚»ã‚¹ã‚’ä¸€æ™‚åœæ¢ã—ãŸã„ã¨ãï¼Ž $ kill -STOP pidkillã‚³ãƒžãƒ³ãƒ‰ã¯å—é¢ã‹ã‚‰ãƒ—ãƒã‚»ã‚¹ã‚’æ®ºã™ã“ã¨ãŒç›®çš„ã‹ ã¨ã„ã†ã¨ãã†ã§ã‚‚ãªãï¼Œ ã‚·ã‚°ãƒŠãƒ«ã‚’é€ã‚‹ã®ãŒãŠä»•äº‹ã ã£ãŸã‚Šã™ã‚‹ï¼Ž å‚è€ƒ Manpage of BASH Manpage of KILL
iqm 2013/06/17
linux

tips
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Linux kernel 3.9 ã®æ–°æ©Ÿèƒ½ SO_REUSEPORT ã‚’è©¦ã—ã¦ã¿ã‚‹ - nigakyã®ãƒ–ãƒã‚°
Linux kernel 3.9 ã®ãƒžãƒ¼ã‚¸ã‚¦ã‚£ãƒ³ãƒ‰ã‚¦ã§ã¯ SO_REUSEPORT ã¨ã„ã†ã‚½ã‚±ãƒƒãƒˆã‚ªãƒ—ã‚·ãƒ§ãƒ³ãŒãƒžãƒ¼ã‚¸ã•ã‚Œã¾ã—ãŸã€‚ Merge branch 'soreuseport' Â· c617f39 Â· torvalds/linux Â· GitHub ã“ã‚Œã¯åŒä¸€ãƒãƒ¼ãƒˆã«è¤‡æ•°ã®ãƒªã‚¹ãƒŠãƒ¼ï¼ˆlisten ã‚½ã‚±ãƒƒãƒˆï¼‰ãŒ bind ã§ãã‚‹ã‚ˆã†ã«ãªã‚‹ã¨ã„ã†ã‚‚ã®ã§ã€Webã‚µãƒ¼ãƒãªã©å˜ä¸€ã®ãƒãƒ¼ãƒˆã«å¤šãã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒæ¥ã‚‹ã‚ˆã†ãªãƒ¯ãƒ¼ã‚¯ãƒãƒ¼ãƒ‰ã§ã€è¤‡æ•°ãƒ—ãƒã‚»ã‚¹ã§ã†ã¾ãè² è·åˆ†æ•£ãŒã§ãã‚‹ã‚ˆã†ã«ãªã‚‹ãã†ã§ã™ã€‚ ï¼ˆã“ã‚Œã¾ã§ã ã¨ä¸€äººãŒaccept()ã—ã¦ãã‚Œãžã‚Œã® worker ã«æ¸¡ã™ã¨ã„ã†ã‚ˆã†ãªãƒ¢ãƒ‡ãƒ«ãŒã‚ã‚Šã¾ã—ãŸãŒã€ã“ã‚Œã§ã¯ accept() ã™ã‚‹éƒ¨åˆ†ãŒãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã«ãªã£ã¦ã—ã¾ã„ãŒã¡ã§ã—ãŸã€‚ï¼‰ BSDã§ã¯å…ƒã€… SO_REUSEPORT ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã¯ã‚ã£ãŸã‚ˆã†ã§ã™ãŒã€ãƒžãƒ«ãƒã‚ãƒ£ã‚¹ãƒˆé€šä¿¡ã§ä½¿ã†ã‚‚ã®ã®ã‚ˆã†ã§ã™ã€‚Linux
iqm 2013/05/17
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linux

kernel

network
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Linuxã‚«ãƒ¼ãƒãƒ«3.9ãƒªãƒªãƒ¼ã‚¹ã€SSDã‚’ã‚ãƒ£ãƒƒã‚·ãƒ¥ã¨ã—ã¦åˆ©ç”¨ã™ã‚‹ã€Œdm-cacheã€ã‚„Andcroidã‚¨ãƒŸãƒ¥ãƒ¬ãƒ¼ã‚¿æ©Ÿèƒ½ãªã©ã‚’æ–°ãŸã«æè¼‰ | OSDN Magazine
Linus Torvaldsæ°ã¯4æœˆ29æ—¥ã€Linuxã‚«ãƒ¼ãƒãƒ«3.9ã®ãƒªãƒªãƒ¼ã‚¹ã‚’ç™ºè¡¨ã—ãŸã€‚SSDã‚’ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ã®ã‚ãƒ£ãƒƒã‚·ãƒ¥ã¨ã—ã¦åˆ©ç”¨ã§ãã‚‹ã€Œdm-cacheã€ã‚„ã€æ–°ã—ã„çœé›»åŠ›ãƒ¢ãƒ¼ãƒ‰ã®è¿½åŠ ã€Androidç’°å¢ƒã®ã‚¨ãƒŸãƒ¥ãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ç’°å¢ƒãªã©ãŒåŠ ã‚ã£ã¦ã„ã‚‹ã€‚ 2æœˆå¾ŒåŠã«ãƒªãƒªãƒ¼ã‚¹ã•ã‚ŒãŸLinuxã‚«ãƒ¼ãƒãƒ«3.8ã‹ã‚‰10é€±é–“ã§ã®æœ€æ–°ç‰ˆãƒªãƒªãƒ¼ã‚¹ã¨ãªã‚Šã€Brtfsã§ã®RAID 5/6ã‚µãƒãƒ¼ãƒˆã‚„SSDã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒ‡ãƒã‚¤ã‚¹ã‚µãƒãƒ¼ãƒˆã€Androidã‚¨ãƒŸãƒ¥ãƒ¬ãƒ¼ã‚¿æ©Ÿèƒ½ã€ã„ãã¤ã‹ã®æ–°ã‚¢ãƒ¼ã‚ãƒ†ã‚¯ãƒãƒ£ã‚µãƒãƒ¼ãƒˆã®è¿½åŠ ã€çœé›»åŠ›æ©Ÿèƒ½ã®å¼·åŒ–ãªã©ãŒç‰¹å¾´ã¨ãªã‚‹ã€‚ Brtfsã§ã¯å¾“æ¥RAID 0/1ã®ã‚µãƒãƒ¼ãƒˆã®ã¿ãŒè¡Œã‚ã‚Œã¦ã„ãŸãŒã€ä»Šå›žæ–°ãŸã«RAID 5ãŠã‚ˆã³6ã®å®Ÿé¨“çš„ã‚µãƒãƒ¼ãƒˆãŒåŠ ã‚ã£ãŸã€‚ãŸã ã—ã‚¯ãƒ©ãƒƒã‚·ãƒ¥ã‚»ãƒ¼ãƒ•ã§ã¯ãªã„ãŸã‚ã€ãƒ†ã‚¹ãƒˆç›®çš„ã§ã®å®Ÿè£…ã¨ã„ã†ã‚¹ãƒ†ãƒ¼ã‚¿ã‚¹ã¨ã®ã“ã¨ã€‚ã¾ãŸã€ã‚¹ãƒŠãƒƒãƒ—ã‚·ãƒ§ãƒƒãƒˆæƒ…å ±ã‚’æ„è˜ã—ãŸãƒ‡ãƒ•ãƒ©ã‚°ï¼ˆSnapshot-aware
iqm 2013/05/07
linux

kernel
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KSMå†…éƒ¨è§£æž - KVMæ—¥è¨˜
æ¦‚è¦ KSM(Kernel SamePage Merging)ã¨ã¯ã€ãƒ¦ãƒ¼ã‚¶ãƒ—ãƒã‚»ã‚¹ã®ãƒ¡ãƒ¢ãƒªé ˜åŸŸã‚’èµ°æŸ»ã—ã¦ã€åŒä¸€å†…å®¹ã®ãƒšãƒ¼ã‚¸ã‚’1ã¤ã®ãƒšãƒ¼ã‚¸ã«ãƒžãƒ¼ã‚¸ã™ã‚‹ã“ã¨ã§ä½¿ç”¨ãƒ¡ãƒ¢ãƒªé‡ã‚’å‰Šæ¸›ã™ã‚‹Linuxã‚«ãƒ¼ãƒãƒ«ã®æ©Ÿèƒ½ã§ã™ã€‚ãƒžãƒ¼ã‚¸ã•ã‚ŒãŸãƒšãƒ¼ã‚¸ã¯CoW(Copy on Write)çŠ¶æ…‹ã«è¨å®šã•ã‚Œã€ãƒšãƒ¼ã‚¸ã¸ã®æ›¸ãè¾¼ã¿ãŒç™ºç”Ÿã™ã‚‹ã¨å†ã³å€‹åˆ¥ã®ãƒšãƒ¼ã‚¸ã«åˆ†è£‚ã•ã‚Œã¾ã™ã€‚ KSMã¯ãƒãƒ¼ã‚¸ãƒ§ãƒ³2.6.32ã§ãƒžãƒ¼ã‚¸ã•ã‚Œã€ä¸»ã«åŒä¸€å†…å®¹ã®ãƒšãƒ¼ã‚¸ã‚’é‡è¤‡ã—ã¦æŒã¤å¯èƒ½æ€§ãŒæ¯”è¼ƒçš„å¤šã„VMåˆ©ç”¨æ™‚ã®ä½¿ç”¨ãƒ¡ãƒ¢ãƒªå‰Šæ¸›ãŒæœŸå¾…ã•ã‚Œã¦ã„ã¾ã™ã€‚ ã“ã®è¨˜äº‹ã¯KSMã®å†…éƒ¨æ§‹é€ ã¨å‹•ä½œã‚’è§£æžã™ã‚‹ã‚‚ã®ã§ã™ã€‚ å¿™ã—ã„äººã®ãŸã‚ã®è§£æžæ¦‚ç•¥ ãƒ¦ãƒ¼ã‚¶ã‚¤ãƒ³ã‚¿ãƒ•ã‚§ãƒ¼ã‚¹ã¯madvise(ã®æ–°ã—ã„ã‚ªãƒ—ã‚·ãƒ§ãƒ³MADV_MERGEABLEã¨MADV_UNMERGEABLE)ã¨/sys/kernel/mm/ksm/ä»¥ä¸‹ã®sysfsãƒ•ã‚¡ã‚¤ãƒ« ãƒ¦ãƒ¼ã‚¶ãƒ—ãƒã‚»ã‚¹ãŒmadviseã§ãƒžãƒ¼ã‚¸ã—ã¦ã‚‚è‰¯ã„
iqm 2013/04/09
kvm

linux

kernel
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ã„ã¾ã™ãå®Ÿè·µ! Linuxã‚·ã‚¹ãƒ†ãƒ ç®¡ç†
ã€Œã„ã¾ã™ãå®Ÿè·µ! Linux ã‚·ã‚¹ãƒ†ãƒ ç®¡ç†ã€ã¯ã“ã¡ã‚‰ã§ã™ã€‚ ãƒ¡ãƒ«ãƒžã‚¬ã®è§£é™¤ã€ãƒãƒƒã‚¯ãƒŠãƒ³ãƒãƒ¼ãªã©ã‚‚ã€ä»¥ä¸‹ã‹ã‚‰ã©ã†ãžã€‚ https://www.usupi.org/sysad/ (ã¾ãã¾ã ID:149633) ãã®ä»–ã€ä½œè€…ã«é–¢ã™ã‚‹ãƒšãƒ¼ã‚¸ã¯ã€æ¦‚ãä»¥ä¸‹ã«ã”ã–ã„ã¾ã™ã€‚ https://www.usupi.org/kuri/ (ã¾ãã¾ã ID:126454) http://usupi.seesaa.net/ (æ —æ—¥è¨˜ãƒ–ãƒã‚°) https://twitter.com/kuriking/ (twitter) https://facebook.com/kuriking3 (facebook) https://jp.pinterest.com/kuriking/pinterest) https://www.instagram.com/kuri_king_/ (instagram) [ãƒãƒƒã‚¯ãƒŠãƒ³ãƒãƒ¼ã®ãƒˆãƒƒãƒ—ã¸
iqm 2013/04/09
linux

tips
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Brendan Gregg's Talk on Linux at SCaLE 11x | Triton DataCenter
Brendan Gregg will be keynoting at SCaLE 12x - February 21-23, 2014. Register Now. Linux Performance Analysis and Tools from brendangregg Our friends at SCaLE invited our lead performance engineer, Brendan Gregg, to speak (again) this year,and he was happy to return. The talk is about Linux Performance Analysis and Tools: specifically, observability tools and the methodologies to use them. Brendan
iqm 2013/03/05
linux

performance

analysis
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ackã‚’æ¨ã¦ã¦ã€ã‚ˆã‚Šé«˜é€Ÿãªag(The Silver Searcher)ã«åˆ‡ã‚Šæ›¿ãˆãŸ - Glide Note
Geoffâ€™s site: The Silver Searcher: Better than Ack ggreer/the_silver_searcher Â· GitHub ãƒ‘ã‚¿ãƒ¼ãƒ³æ¤œç´¢ã«ã¯ackã‚’åˆ©ç”¨ã—ã¦ã„ã¦ã€é€šå¸¸åˆ©ç”¨æ™‚ã«ã¯ç‰¹ã«ä¸æº€ã¯ç„¡ã‹ã£ãŸã‚“ã§ã™ãŒã€ ãƒ•ã‚¡ã‚¤ãƒ«æ•°ãŒå¤šã„ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã ã¨é…ã‹ã£ãŸã®ã§ã€ã‚‚ã£ã¨ä»–ã®æ–¹æ³•ãŒç„¡ã„ã‹ã¨èª¿ã¹ã¦ã„ãŸã‚‰ ackã®3ã€œ5å€é€Ÿã„ã¨ã„ã†The Silver Searcherã¨ã„ã†ã‚‚ã®ãŒ ã‚ã£ãŸã®ã§å°Žå…¥ã€‚ The Silver Searcherã®ç‰¹å¾´ å…¬å¼ã«æ›¸ã„ã¦ã‚ã‚‹The Silver Searcherã®ç‰¹å¾´ ackã®3ã€œ5å€é«˜é€Ÿ .gitignoreã€.hgignoreã«è¨˜è¼‰ã•ã‚Œã¦ã„ã‚‹ã‚‚ã®ã‚’æ¤œç´¢å¯¾è±¡ã‹ã‚‰é™¤å¤– æ¤œç´¢å¯¾è±¡ã‹ã‚‰é™¤å¤–ã—ãŸã„ãƒ•ã‚¡ã‚¤ãƒ«ã¯.agignoreã«è¨˜è¼‰ agã¨ã„ã†ã‚³ãƒžãƒ³ãƒ‰åã§ã€ackã¨æ¯”ã¹ã¦ã‚³ãƒžãƒ³ãƒ‰ãŒçŸã„(33%æ¸›!) ãªãœé«˜é€Ÿãªã®ã‹ã¯ https
iqm 2013/03/01
linux
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Private Presentation
Private content!This content has been marked as private by the uploader.
iqm 2013/01/18
Linux
ãƒªãƒ³ã‚¯
Momma's Wiki: Ubuntu/gccã®åˆ‡ã‚Šæ›¿ãˆ - gccã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚’å¿…è¦ã«å¿œã˜ã¦åˆ‡ã‚Šæ›¿ãˆã‚‰ã‚Œã‚‹ã‚ˆã†ã«ã™ã‚‹ ã“ã®ã‚³ãƒžãƒ³ãƒ‰ã‚’ä½¿...
update-alternatives ã“ã®ã‚³ãƒžãƒ³ãƒ‰ã‚’ä½¿ã†ã¨ä»»æ„ã®ç’°å¢ƒã«åˆ‡ã‚Šæ›¿ãˆã‚‰ã‚Œã‚‹ sudo update-alternatives --list gcc ã¨ã—ã¦ç™»éŒ²ãŒã‚ã‚Œã°--configã‚ªãƒ—ã‚·ãƒ§ãƒ³ã§è¨å®šã™ã‚‹ã€‚ ç„¡ã„å ´åˆã¯ä¸‹è¨˜ã®é€šã‚Šã€‚(4.4ã¨4.6ã‚’åˆ‡ã‚Šæ›¿ãˆã‚‹ä¾‹) sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 46 --slave /usr/bin/g++ g++ /usr/bin/g++-4.6 --slave /usr/bin/gcov gcov /usr/bin/gcov-4.6 sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.4 44 --slave /usr/bin/g++ g++ /usr/bi
iqm 2013/01/17
linux

gcc
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