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linuxã«é–¢ã™ã‚‹n0tsã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (21)

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sudo ã‚³ãƒžãƒ³ãƒ‰å®Ÿè¡Œã—ã¦ã‚‚ã€ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ãƒˆã§ãƒ•ã‚¡ã‚¤ãƒ«ã«æ›¸ãè¾¼ã‚ãªã„ï¼Ž - ãã‚Œãƒžã‚°ã§ï¼
sudo ã‚’å¤šç”¨ã—ã¦ã„ã‚‹Takuyaã§ã™ã€‚ã“ã‚“ã°ã‚“ã¯ã€‚Sudoã¯ä¾¿åˆ©ãªã®ã§æ´»ç”¨ã—ã¾ã™ãŒï¼Œãƒªãƒ€ã‚¤ãƒ¬ã‚¯ãƒˆã§ãƒ•ã‚¡ã‚¤ãƒ«ã«æ›¸è¾¼ã‚‚ã†ã¨æ€ã£ã¦ã‚‚ãƒ‘ãƒ¼ãƒŸãƒƒã‚·ãƒ§ãƒ³Errorã«ãªã‚‹ã®ã§å›°ã£ã¦ã„ã¾ã™ï¼Ž sudo ã¯å‡ºæ¥ã¦ã‚‚ãƒ•ã‚¡ã‚¤ãƒ«ã«æ›¸ãè¾¼ã‚ãªã„ä¾‹ sudo do_something > /etc/apt/apt.conf.d/hogeã«ã‚ˆã†ã«sudoã—ã¦çµæžœã‚’æ›¸ãè¾¼ã‚‚ã†ã¨ã—ã¦ã‚‚ãƒ‘ãƒ¼ãƒŸãƒƒã‚·ãƒ§ãƒ³ãƒ»ã‚¨ãƒ©ãƒ¼ã«ãªã‚‹ã€‚ ãŸã¶ã‚“Echoã¨ãƒ‘ã‚¤ãƒ—ã‚‚Sudoã™ã‚Œã°è¡Œã‘ã‚‹ã¨æ€ã†ã¨ãŠã‚‚ã£ã¦è©¦ã—ãŸãŒãƒ»ãƒ»ãƒ» sudo do_something | sudo echo - > /etc/hogehoge #ã“ã‚Œã¯å‡ºæ¥ãªã„ã€‚ MANã«æ›¸ã„ã¦ã‚ã‚‹ï¼Ž å›°ã£ã¦ã€Manã‚’èªã‚“ã ã‚‰Manã«æ›¸ã„ã¦ã‚ã£ãŸï¼ŽSudoã®Manæœ€é«˜ /home ãƒ‘ãƒ¼ãƒ†ã‚£ã‚·ãƒ§ãƒ³ã«ã‚ã‚‹ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã®ãƒ‡ã‚£ã‚¹ã‚¯ä½¿ç”¨é‡ãƒªã‚¹ãƒˆã‚’ä½œæˆã™ã‚‹ã€‚ cd ã¨ãƒ•ã‚¡ã‚¤ãƒ«ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ãŒå‹•ä½œã™ã‚‹ã‚ˆã†ã«
n0ts 2014/04/22
sudo sh -c "do_something > /etc/fstab.d/foo"

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dstatã®ä¾¿åˆ©ãªã‚ªãƒ—ã‚·ãƒ§ãƒ³ã¾ã¨ã‚ - Qiita
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n0ts 2013/11/02
dstat

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Linuxã‚«ãƒ¼ãƒãƒ«ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®ãƒ¡ãƒ¢ - é›»åæ›¸ç±ã¨è¶£å‘³ã®éƒ¨å±‹
Post navigation â† Previous Home > Webé–¢é€£ > é–‹ç™º > Linux > Linuxã‚«ãƒ¼ãƒãƒ«ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®ãƒ¡ãƒ¢ Linuxã‚«ãƒ¼ãƒãƒ«ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®ãƒ¡ãƒ¢ ã‚µãƒ¼ãƒãƒ¼å‘ã‘ã«Linuxã‚«ãƒ¼ãƒãƒ«ã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã‚’è¡Œã£ãŸéš›ã®ãƒ¡ãƒ¢ã§ã™ã€‚ è¨å®šå†…å®¹ ä»Šå›žè¡Œã£ãŸ /etc/sysctl.conf ã®è¨å®šå†…å®¹ã¯æ›¸ãã®é€šã‚Šã§ã™ã€‚ å„ãƒ‘ãƒ©ãƒ¡ãƒ¼ã‚¿ã®èª¬æ˜Žã¯ã‚³ãƒ¡ãƒ³ãƒˆã¨ã—ã¦æ®‹ã—ã¦ãŠãã¾ã™ã€‚ # å…±æœ‰ãƒ¡ãƒ¢ãƒªã®æœ€å¤§ã‚µã‚¤ã‚ºã€‚ã‚µãƒ¼ãƒãƒ¼ã®æè¼‰ãƒ¡ãƒ¢ãƒª(1GB)ã«åˆã‚ã›ã¦å¤‰æ›´ kernel.shmmax = 1073741824 # ã‚·ã‚¹ãƒ†ãƒ å…¨ä½“ã®å…±æœ‰ãƒ¡ãƒ¢ãƒªãƒ»ãƒšãƒ¼ã‚¸ã®æœ€å¤§æ•° kernel.shmall = 262144 # ã‚·ã‚¹ãƒ†ãƒ å…¨ä½“ã®ãƒ—ãƒã‚»ã‚¹æ•°ã®ä¸Šé™ kernel.threads-max = 1060863 # ã‚·ã‚¹ãƒ†ãƒ å…¨ä½“ã®ãƒ•ã‚¡ã‚¤ãƒ«ãƒ‡ã‚£ã‚¹ã‚¯ãƒªãƒ—ã‚¿ã®ä¸Šé™ fs.file-max = 5242880
n0ts 2013/08/20
Linux ã® sysctl TCP ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ãƒ¡ãƒ¢

linux
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Index of /pub/linux/kernel/v3.0/
n0ts 2013/07/02
Linux kernel changelog version 3.x

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HugePagesã¨ãã®è¨å®š_2
å‰å›žã¯ã“ã¡ã‚‰ï¼šHugePagesã¨ãã®è¨å®š_1 ãƒ™ãƒ¼ã‚¹ã¯OracleÂ® Databaseç®¡ç†è€…ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ 11g ãƒªãƒªãƒ¼ã‚¹2(11.2)for Linux and UNIX-Based Operating Systemsã®æ‰‹é †ã«æ²¿ã£ã¦ã„ã¾ã™ã€‚ ã§ã¯è¨å®šã—ã¦ã„ãã¾ã™ã€‚ ç’°å¢ƒ ========================================================= CPU: Intel(R) Xeon(R) CPU E5630 @ 2.53GHzÃ—4 ãƒ¡ãƒ¢ãƒªï¼š24GB OS:Red Hat Enterprise Linux Server release 5.4 (Tikanga) ã‚«ãƒ¼ãƒãƒ«ï¼š2.6.18-164.el5 Bit:64 # df -h |grep shm shmfs 15G 766M 15G 5% /dev/shm #free -m total use
n0ts 2013/01/23
HugePages ã®è¨å®šã¾ã¨ã‚

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netdev - Re: Problems with dropped packets on bonded interface for 3.x kernels
n0ts 2012/11/19
drop ãƒ‘ã‚±ãƒƒãƒˆã®ã‚«ã‚¦ãƒ³ãƒˆæ–¹æ³•ã®ä»•æ§˜å¤‰æ›´ã«ã¤ã„ã¦

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Linux_3.6 - Linux Kernel Newbies
Linux 3.6 has been released on 30 Sep 2012 Summary: This Linux release includes new features in Btrfs: subvolume quotas, quota groups and snapshot diffs (aka "send/receive"). It also includes support for suspending to disk and memory at the same time, a TCP "Fast Open" mode, a "TCP small queues" feature to fight bufferbloat; support for safe swapping over NFS/NBD, better Ext4 quota support, suppor
n0ts 2012/10/03
Linux 3.6

linux
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TCP Fast Open: expediting web services
Much of today's Internet traffic takes the form of short TCP data flows that consist of just a few round trips exchanging data segments before the connection is terminated. The prototypical example of this kind of short TCP conversation is the transfer of web pages over the Hypertext Transfer Protocol (HTTP). The speed of TCP data flows is dependent on two factors: transmission delay (the width of
n0ts 2012/10/03
Linux 3.6 ã§å°Žå…¥ã•ã‚ŒãŸ TCP Fast Open ã«ã¤ã„ã¦

linux
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Charming Python: Functional programming in Python, Part 3
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
n0ts 2012/07/23
Linux 3.3 / 3.4 ã«ã¤ã„ã¦

linux
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What is the recommended size for a Linux /boot partition?
n0ts 2012/07/14
ä»Šã©ãã® /boot ãƒ‘ãƒ¼ãƒ†ã‚£ã‚·ãƒ§ãƒ³ã‚µã‚¤ã‚ºã€Fedora ã§ preupgrade-cli ã™ã‚‹ã¨ãã¯ 250MB ãã‚‰ã„ã«å¿…è¦ãªã®ã§è¦æ³¨æ„ã€‚å®‰å…¨ã‚’ã¿ã‚‹ã«ã¯ã€1GB ã«ã™ã‚‹ã¨ã‚ˆã„ã€‚

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heise online â€“ IT news, guides and background information | heise online
n0ts 2012/07/12
RHEL 6.3 ã®ãŠã‚‚ãªæ–°æ©Ÿèƒ½ã«ã¤ã„ã¦

linux
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Linux / UNIX Generate Passwords using /dev/urandom
n0ts 2012/07/10
tr -dc A-Za-z0-9_ < /dev/urandom | head -c 16 | xargs ãƒ©ãƒ³ãƒ€ãƒ ãƒ‘ã‚¹ãƒ¯ãƒ¼ãƒ‰ã‚’ç”Ÿæˆã™ã‚‹ã¨ãã«ä¾¿åˆ©

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Disable the excessive logging of snmpd for RHEL 5
n0ts 2012/06/24
snmpd.conf ã§ã€Connection from UDP...ãƒã‚°ã®å‡ºåŠ›ã‚’æŠ‘åˆ¶ã™ã‚‹æ–¹æ³•

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Linuxã®bonding(802.3ad)ã§ç™ºç”Ÿã—ãŸãƒˆãƒ©ãƒ•ã‚£ãƒƒã‚¯ã®åã‚Šã‚’ãªãŠã—ãŸè©± - å…ƒRX-7ä¹—ã‚Šã®é©å½“ãªæ—¥ã€…
ã¯ã˜ã‚ã« ã¨ã‚ã‚‹ç’°å¢ƒã®è©±ã€‚internalã®Linuxã‚µãƒ¼ãƒã§bonding(ãƒœãƒ³ãƒ‡ã‚£ãƒ³ã‚°)ã‚’çµ„ã‚“ã§ã„ã¾ã—ãŸã€‚modeã¯4ã€‚802.3ad(LACP)æº–æ‹ ã®ãƒªãƒ³ã‚¯ã‚¢ã‚°ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ãªãƒ¢ãƒ¼ãƒ‰ã§ã™ã€‚ ã¡ãªã¿ã«ã€bondingã¨ã¯ãƒ»ãƒ»ãƒ» ã¡ãªã¿ã«ã€"bonding"ã¨ã¯ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã‚’å†—é•·åŒ–(ã¾ãŸã¯è² è·åˆ†æ•£)ã™ã‚‹æ–¹æ³•ã§ã€è¤‡æ•°ã®NICã‚’æŸãã¦1æœ¬ã«è¦‹ã›ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ãƒãƒ¼ãƒŸãƒ³ã‚°(teaming)ã¨å‘¼ã°ã‚ŒãŸã‚Šã‚‚ã—ã¾ã™ãã€‚ ã§ã€Linuxã§ã¯bondingã«ã‚‚ã„ãã¤ã‹ãƒ¢ãƒ¼ãƒ‰ãŒã‚ã£ã¦ã€è¤‡æ•°ã®ãƒãƒªã‚·ãƒ¼ã®ä¸ã‹ã‚‰é¸æŠžã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ balance-rr åˆã¯ 0 - è€éšœå®³æ€§ã¨ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚·ãƒ³ã‚°ã®ãŸã‚ãƒ©ã‚¦ãƒ³ãƒ‰ãƒãƒ“ãƒ³ãƒãƒªã‚·ãƒ¼ã‚’è¨å®šã—ã¾ã™ã€‚åˆ©ç”¨å¯èƒ½ãªç¬¬ 1 ã®ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã‹ã‚‰ãã‚Œãžã‚Œã®ãƒœãƒ³ãƒ‡ã‚£ãƒ³ã‚°ã•ã‚ŒãŸã‚¹ãƒ¬ãƒ¼ãƒ–ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã§é€å—ä¿¡ãŒé †æ¬¡è¡Œã‚ã‚Œã¾ã™ã€‚ active-backup åˆã¯
n0ts 2012/06/18
options bond0 mode=4 lacp_rate=1 miimon=200 xmit_hash_policy=layer2+3

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ãƒšãƒ¼ã‚¸ãŒè¦‹ã¤ã‹ã‚Šã¾ã›ã‚“ | æ—¥æœ¬HP
ãƒšãƒ¼ã‚¸ãŒè¦‹ã¤ã‹ã‚Šã¾ã›ã‚“ã€‚ ç›®çš„ã®ãƒšãƒ¼ã‚¸ã¯ã€ç§»å‹•ã¾ãŸã¯å‰Šé™¤ã«ã‚ˆã£ã¦ç„¡åŠ¹ã«ãªã£ã¦ã„ã‚‹å¯èƒ½æ€§ãŒã‚ã‚Šã¾ã™ã€‚ç”³ã—è¨³ã‚ã‚Šã¾ã›ã‚“ãŒã€æ¤œç´¢ã¾ãŸã¯ãƒªãƒ³ã‚¯å…ˆã‚ˆã‚ŠãŠæŽ¢ã—ãã ã•ã„ã€‚
n0ts 2012/06/18
Linux bonding ãƒ‰ãƒ©ã‚¤ãƒã®é•ã„ã«ã¤ã„ã¦ã®è©³ã—ã„èª¬æ˜Ž

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Linux_3.4 - Linux Kernel Newbies
Linux 3.4 has been released on 20 May, 2012. Summary: This release includes several Btrfs updates: support of metadata blocks bigger than 4KB, much improved metadata performance, better error handling and better recovery tools; there is also a new X32 ABI which allows to run programs in 64-bit mode with 32-bit pointers; several updates to the GPU drivers: early modesetting of Nvidia GeForce 600 'K
n0ts 2012/06/18
Linux 3.4 release note

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ã†ã‚‹ã†ç§’ã®Linuxã¸ã®å½±éŸ¿(2012å¹´7æœˆç‰ˆ) - cuspy diary
2012å¹´7æœˆ1æ—¥ 08:59:59 ç§’(JST)ã®å¾Œã«1ç§’ãŒè¿½åŠ ã•ã‚Œã‚‹ã€ã†ã‚‹ã†ç§’ãŒç™ºç”Ÿã—ã¾ ã™ã€‚ ã†ã‚‹ã†ç§’ã«é–¢ã™ã‚‹åŸºæœ¬çš„ãªæƒ…å ±ã¯ä»¥ä¸‹ã®NICTã®ãƒšãƒ¼ã‚¸ã§èª¬æ˜Žã•ã‚Œã¦ã„ã¾ã™ã€‚ ã†ã‚‹ã†ç§’ã®å¯¾å¿œï¼ˆï¼’ï¼ï¼‘ï¼’å¹´ï¼—æœˆå®Ÿæ–½ç‰ˆï¼‰ ã“ã®ã†ã‚‹ã†ç§’ç™ºç”Ÿæ™‚ã«ãŠã‘ã‚‹ã€Linuxä¸Šã®NTPã®å‹•ä½œã«ã¤ã„ã¦æ¤œè¨¼ã—ã¦ã¿ãŸæ‰€ã€ å„ç¨®Linuxãƒ‡ã‚£ã‚¹ãƒˆãƒªãƒ“ãƒ¥ãƒ¼ã‚·ãƒ§ãƒ³ã«ã‚ˆã£ã¦å‹•ä½œãŒç•°ãªã‚‹äº‹ãŒè§£ã£ãŸã®ã§ã¾ã¨ã‚ ã¦ã¿ã¾ã—ãŸã€‚ æ¤œè¨¼ã¯NICTã§å…¬é–‹ã•ã‚Œã¦ã„ã‚‹ ç°¡æ˜“NTPã‚µãƒ¼ãƒãƒ¼ ã‚’åˆ©ç”¨ã—ã¦ã€LIãƒ•ãƒ©ã‚°ãŒ01ã®ãƒ‘ã‚±ãƒƒãƒˆã‚’å—ã‘å–ã‚‹æ–¹æ³•ã§è¡Œã„ã¾ã—ãŸã€‚ ã†ã‚‹ã†ç§’ç™ºç”Ÿæ™‚ã®æŒ™å‹•ã¨ã—ã¦ä»¥ä¸‹3ç¨®é¡žã®ãƒ‘ã‚¿ãƒ¼ãƒ³ãŒæŒ™ã’ã‚‰ã‚Œã¾ã™ã€‚ kernelã®æ©Ÿèƒ½ã‚’åˆ©ç”¨ã—ã¦æ™‚åˆ»ã®è£œæ£ã‚’è¡Œã† LIãƒ‘ã‚±ãƒƒãƒˆå—ä¿¡æ™‚ã€ntpdã¯ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã® adjtimex(2) ã‚’ç™ºè¡Œã—ã€kernelã®æ©Ÿèƒ½ã‚’åˆ©ç”¨ã—ã¦æ™‚åˆ»ã®èª¿æ•´ã‚’è¡Œã„ã¾ã™ã€‚çµæžœã¨ã—ã¦ã€ ã†ã‚‹ã†ç§’ç™ºç”Ÿæ™‚ã«æ™‚é–“ã®é€†è¡ŒãŒç™ºç”Ÿã—ã¾ã™
n0ts 2012/06/13
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WSCacheHitRate - Systemtap Wiki
Measuring Linux Filesystem Cache Hit Rate Script written by Jake Maul, jakemaul@gmail.com. Lots of input from the mailing list (Josh Stone, Will Cohen, Thiago Manel), and Dave Wright. Probl em None of the standard tools give any good indication as to how effective the Linux filesystem cache is at caching your data. You can guess at it by clearing it and watching how fast it grows, but this is a fai
n0ts 2012/05/29
Linux ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒ’ãƒƒãƒˆçŽ‡ã®ç®—å‡ºæ–¹æ³•

linux
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Linux_3.3 - Linux Kernel Newbies
Linux 3.3 has been released (official announcement) on 18 Mar 2012. Summary: This release features as the most important change the merge of kernel code from the Android project. But there is more, it also includes support for a new architecture (TI C6X), much improved balancing and the ability to restripe between different RAID profiles in Btrfs, and several network improvements: a virtual switch
n0ts 2012/03/26
There is a new "teaming" network device, which is intended to be a fast, scalable, clean, userspace-driven replacement for the bonding driver. It allows to create virtual interfaces that teams together multiple Ethernet devices. This is typically used to increase the maximum bandwidth and

linux
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2TBã‚’è¶…ãˆã‚ï¼ ATAãƒ‡ã‚£ã‚¹ã‚¯ã®4Kã‚»ã‚¯ã‚¿å•é¡Œã¨ã¯ï¼Ÿï¼ˆ1/2ï¼‰ ï¼ ï¼ IT
3æœˆç‰ˆã€€2TBã‚’è¶…ãˆã‚ï¼ ATAãƒ‡ã‚£ã‚¹ã‚¯ã®4Kã‚»ã‚¯ã‚¿å•é¡Œã¨ã¯ï¼Ÿ å°å´Žè³‡åºƒ 2010/4/7 å‰å›žæ›¸ã„ãŸsys_membarrier()ã§ã™ãŒã€ãªã‹ãªã‹ãƒžãƒ¼ã‚¸ã•ã‚Œãªã„çŠ¶æ…‹ãŒç¶šã„ã¦ã„ã¾ã™ã€‚ã ã„ãŸã„è°è«–ã‚‚å‡ºå°½ãã—ã¦å¾Œã¯ãƒžãƒ¼ã‚¸ã™ã‚‹ã ã‘ã ã¨æ€ã£ã¦ã„ã‚‹ã®ã§ã™ãŒã€ã©ã†ã‚‚Ingoã¯æ°—ã«å…¥ã‚‰ãªã„ã”æ§˜åã€‚ãŸã¶ã‚“ã‚ªãƒ¬å°‚ç”¨APIã£ã·ã‚ŠãŒç¾Žçš„æ„Ÿè¦šã«åˆã‚ãªã„ã®ã§ã—ã‚‡ã†ã€‚ã„ã¤ã‚‚ã€ŒGenericã«ä½¿ãˆã‚‹ã‚ˆã†ã«ã€ã£ã¦ã„ã„ã¾ã™ã‹ã‚‰ã€‚ Compactionãƒ‘ãƒƒãƒã¯ã€ãƒžãƒ¼ã‚¸ã®ä¸€ç•ªã®ãƒãƒƒã‚¯ã ã£ãŸkosakiãŒãªã‹ãªã‹ãƒ¬ãƒ“ãƒ¥ãƒ¼ã—ãªã„å•é¡Œã¯å…ˆæœˆè‹¥å¹²é€²å±•ã—ã¦ã€ãƒžãƒ¼ã‚¸ã™ã‚‹æ–¹å‘ã§é€²ã‚“ã§ã„ã‚‹ã¿ãŸã„ã§ã™ã€‚ ã•ã¦ã€ä»Šæœˆã¯ä¹…ã—ã¶ã‚Šã«ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã®ãŠè©±ã§ã™ã€‚ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ã®å®¹é‡ãŒ2TiBï¼ˆç·¨æ³¨ï¼šãƒ†ãƒ“ãƒã‚¤ãƒˆã€1024GiBï¼‰ã‚’è¶…ãˆã‚‹ã®ã¨å‰å¾Œã—ã¦ã€4KiBï¼ˆç·¨æ³¨ï¼šã‚ãƒ“ãƒã‚¤ãƒˆã€1024bytesï¼‰ã‚»ã‚¯ã‚¿ã®ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ãŒå‡ºå›žã‚Šå§‹ã‚ã¦ã„ã¾ã™ã€‚ã“ã‚Œã«ã¤ã„ã¦ãƒãƒ¼
n0ts 2012/01/17
2TBã€AFT

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