What are the file and file system size limitations for Red Hat Enterprise Linux? - Red Hat Customer Portal
Units Units are given in binary prefix: TiB = Tebibyte = 240 PiB = Pebibyte = 250 EiB = Exbibyte = 260 Theoretical limits The difference between certified and maximum limit is that certified indicates what the file system has been tested to versus what the theoretical maximums are within the code base. For example, GFS2 is a 64-bit based file system and has a theoretical limit of 8EiB, but only fi
Linux ファイルシステムã«ãŠã‘ã‚‹ãƒã‚°å‚¾å‘
Linux ã«ã¯è¤‡æ•°ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ãŒã‚ã‚Šã¾ã™ï¼Žã“れらã«ã¯ï¼Œä»•æ§˜ã¨ã—ã¦ã®æ©Ÿèƒ½å·®ã®ä»–ã«ï¼Œå“質・安定度ã«é–¢ã—ã¦å¤§ããªå·®ãŒã‚ã‚‹ã¨è€ƒãˆã‚‰ã‚Œã¦ã„ã¾ã™ï¼Ž 今回ã¯ï¼Œãã®ã‚ãŸã‚Šã‚’定é‡çš„ã«åˆ†æžã—ãŸè«–文をã”紹介． A Study of Linux File System Evolution [ã‚ャッシュ] https://www.usenix.org/conference/fast13/study-linux-file-system-evolution 調査ã®å¯¾è±¡ã¯ï¼ŒXFS/Ext4/Btrfs/Ext3/Reiser/JFS ã® 6 ã¤ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ．ã“れらã«ã¤ã„ã¦ï¼ŒLinux 2.6.0 (Dec ’03) ã‹ã‚‰ 2.6.39 (May ’11) ã®é–“ã«å–ã‚Šè¾¼ã¾ã‚ŒãŸ 5,079 個ã®ãƒ‘ッãƒã‚’分æžã—ã¦ã„ã¾ã™ï¼Ž パッãƒã®ç¨®é¡ž ã¾ãšï¼Œãƒ‘ッãƒã‚’次㮠5 種類ã«åˆ†é¡žã—ã¦ã„ã¾ã™ï¼Ž Bug ãƒã‚°ã®ä¿®æ£ï¼Ž Reli
Hoytech
vmtouch - the Virtual Memory Toucher Portable file system cache diagnostics and control Download from github Read the online manual vmtouch is a tool for learning about and controlling the file system cache of unix and unix-like systems. It is BSD licensed so you can basically do whatever you want with it. Quick install guide: $ git clone https://github.com/hoytech/vmtouch.git $ cd vmtouch $ make
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http://www.phoronix.com/scan.php?page=article&item=ext4_btrfs_nilfs2&num=1 ãŸã¶ã‚“ã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆãƒ‘ラメタã§å‹è² ã—ã¦ã„ã‚‹ã®ã§ã€ext3ã¯writebackモードã ã¨æ€ã†ã€‚ è¦ç´„ ・SQLiteテストã¯ext3ãŒ20秒ã§çµ‚ã‚ã‚‹ã¨ã“ã‚ãŒã€ext4ã§ã¯870秒ã€btrfsã«è‡³ã£ã¦ã¯1472秒もã‹ã‹ã£ãŸ ・PostgreSQLã®pgbenchã®btrfs, XFSã¯å®Œèµ°ã§ããªã‹ã£ãŸ ・IOZone Write: ext3:107MB/s, ext4:131MB/s, Btrfs:89MB/s Read: ext3:202MB/s, ext4:219MB/s, Btrfs:93MB/s Btrfsé…ã„ãªï½ž ・Dbenchã¯ext3:100MB/s, ext4:32MB/s, Btrfs:46MB/s ã‚„ã¯ã‚Šã€ordered-mod
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ã‚ã‚Œã€ã»ã¨ã‚“ã©ã®é …ç›®ã§ext2ã«å‹ã£ã¦ã‚‹ã˜ã‚ƒã‚“。 On Wed, Jan 07, 2009 at 11:29:11AM -0800, Curt Wohlgemuth wrote: > > I ran both iozone and compilebench on the following filesystems, using a > 2.6.26-based kernel, with most ext4 patches applied. This is on a x86 based > 4-core system, with a separate disk for these runs. Curt, thanks for doing these test runs. One interesting thing to note is that even though ext3 was ru
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squashfsã¨ã„ã†ã®ã¯cramfsã¨åŒã˜ãread onlyã ã‘ã©åœ§ç¸®ã‚’サãƒãƒ¼ãƒˆã™ã‚‹ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã§çµ„ã¿è¾¼ã¿ã®ãƒ«ãƒ¼ãƒˆãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã«ã‚ˆã使ã‚ã‚Œã¦ã„ã¾ã™ã€‚ cramfsã¯è¶…大昔ã«Linusã§ãŠéŠã³ã§ä½œã£ãŸãƒ•ã‚¡ã‚¤ãƒ«ãªã®ã§ã€ ・最大ファイルシステムサイズãŒå°ã•ã„ ・最近ã®ãƒ¢ãƒ€ãƒ³ãªãƒ•ã‚£ãƒ¼ãƒãƒ£ãƒ¼ã«ä¸€åˆ‡å¯¾å¿œã—ã¦ã„ãªã„ ã¨ã„ã£ãŸå•é¡ŒãŒã‚ã£ãŸã®ã§ã—ãŸã€‚ ã“ã“ã§ã€Phillip Lougher ã«ã‚ˆã‚‹æ¯”較表ã©ãƒ¼ã‚“ Squashfs Cramfs Max filesystem size: 2^64 256 MiB Max file size: ~ 2 TiB 16 MiB Max files: unlimited unlimited Max directories: unlimited unlimited Max entries per directory: unlimited unlimited M
HDFS Reliability Document by Cloudera. Inc. - moratorium
HDFS Reliability Document by Cloudera. Inc. 2009-01-14 (Wed) 23:57 Hadoop HDFS Reliability Clouderaã¨ã„ã†ä¼šç¤¾ã‹ã‚‰ã€HDFSã®è€éšœå®³æ€§ã®è§£èª¬ã¨ã€é‹ç”¨ã™ã‚‹ç‚¹ã§ã®ãƒã‚¤ãƒ³ãƒˆãŒæ›¸ã‹ã‚ŒãŸãƒ‰ã‚ュメントãŒå‡ºã¦ã„ã‚‹ã¿ãŸã„ã§ã™ã€‚ Cloudera ã“ã®Clouderaã¨ã„ã†ä¼šç¤¾ã¯Sleepycat(BDB作ã£ã¦ãŸä¼šç¤¾ã€OracleãŒè²·åŽ)ã®å…ƒCEOãŒç«‹ã¡ä¸Šã’ãŸä¼šç¤¾ã§ã€Hadoopã®å•†ç”¨ã‚µãƒãƒ¼ãƒˆãƒ»ãƒˆãƒ¬ãƒ¼ãƒ‹ãƒ³ã‚°ã‚’ã—ã¦ã‚‹ã¿ãŸã„ã§ã™ã。 メンãƒãƒ¼ã‚’見るã¨ã€å±¤ã€…ãŸã‚‹é¢ã€…。Christophã•ã‚“ã¯GOOGã«ã„る時ã«å–り上ã’られã¦ãŸã‚Šã—ã¦ã¾ã—ãŸã。 Hadoop周りã®äºº(ãã‚“ãªäººã„ã‚‹ã®ã‹ï¼Ÿ)ã¯è¦æ³¨ç›®ã®ä¼šç¤¾ã ã¨æ€ã„ã¾ã™ã€‚ Similar Posts: HDFSã§ã‚¢ãƒˆãƒŸãƒƒã‚¯ãªè¿½è¨˜æ“作ãŒã‚µãƒãƒ¼ãƒˆ Hadoopã®ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã¨ã‚µãƒ³ãƒ—
Barriers and journaling filesystems [LWN.net]
Journaling filesystems come with a big promise: they free system administrators from the need to worry about disk corruption resulting from system crashes. It is, in fact, not even necessary to run a filesystem integrity checker in such situations. The real world, of course, is a little messier than that. As a recent discussion shows, it may be even messier than many of us thought, with the integr
Bonnie++を使ã£ãŸãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ 性能ã®ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ | OSDN Magazine
Bonnie++ã¯ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã«é–¢ã™ã‚‹æ§˜ã€…ãªã‚¿ã‚¹ã‚¯ã‚’ベンãƒãƒžãƒ¼ã‚¯ã™ã‚‹ã“ã¨ãŒã§ãるツールã§ã€RAIDã®æ§‹æˆã‚„ファイルシステムã®æ§‹æˆã‚„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã®è¨å®šãªã©ã‚’変更ã™ã‚‹éš›ã«å¤§ã„ã«å½¹ç«‹ã¤ã€‚ Bonnie++ã¯openSUSE 10.3（1-クリック・インストール）ã€Ubuntu Hardyã€æ¨™æº–ã®Fedora 9リãƒã‚¸ãƒˆãƒªãªã©ã‹ã‚‰å…¥æ‰‹å¯èƒ½ã 。今回ã¯64ビット用Fedora 9リãƒã‚¸ãƒˆãƒªã‹ã‚‰ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—ãŸã€‚ Bonnie++ã¯Ubuntu用ã¨Fedora用ã®ãƒ‘ッケージã§ã¯/usr/sbinã«ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã•ã‚Œã‚‹ã®ã«å¯¾ã—ã¦openSUSEã§ã¯/usr/binã«ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã•ã‚Œã‚‹ã€‚ルートユーザã¨ã—ã¦èµ·å‹•ã™ã‚‹ã¨ã‚¨ãƒ©ãƒ¼ãŒå‡ºã¦å®Ÿè¡Œã§ããªã„ã®ã ãŒã€/usr/binã§ã¯ãªã/usr/sbinã«ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—ã¦ã‚ã‚‹å ´åˆã€é€šå¸¸ã®ãƒ¦ãƒ¼ã‚¶ã¨ã—ã¦å®Ÿè¡Œã™ã‚‹ãŸã‚ã«ã¯ãƒ•ãƒ«ãƒ‘スを指定ã™ã‚‹å¿…è¦ãŒãŠãらãã‚ã‚‹ã ã‚ã†
FileSystemé¸æŠžæ³• 奥山　å¥ä¸€ 2004/08/29 Linuxã§ä½¿ãˆã‚‹ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ â— ext2/ext3 â— ReiserFS â— XFS â— JFS â— VFAT,NTFS,ç‰ã€…も使ãˆã‚‹ãŒã€èµ·å‹•fsã«ã™ã‚‹ ã«ã¯â€¦ ext2/ext3 â— 2nd Extended fs/ 3rd Extended fs (第2版�
FileSystemé¸æŠžæ³• 奥山　å¥ä¸€ 2004/08/29 Linuxã§ä½¿ãˆã‚‹ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ â— ext2/ext3 â— ReiserFS â— XFS â— JFS â— VFAT,NTFS,ç‰ã€…も使ãˆã‚‹ãŒã€èµ·å‹•fsã«ã™ã‚‹ ã«ã¯â€¦ ext2/ext3 â— 2nd Extended fs/ 3rd Extended fs (第2版拡張fs / 第3版拡張fs) ã®ç•¥ â— MINIX fs ãŒã€Œæ©Ÿèƒ½æ‹¡å¼µå‰ã®ç‰ˆã€ – 最大64Mbyteã®ãƒ‘ーティションサイズ – 32æ–‡å—ã¾ã§ã®ãƒ•ã‚¡ã‚¤ãƒ«å â— Ext 㯠MINIX fs ã‚’æ‹¡å¼µã—ãŸã‚‚㮠– 最大2Gbyte ã®ãƒ‘ーティション – 255æ–‡å—ã¾ã§ã®ãƒ•ã‚¡ã‚¤ãƒ«å ext2/ext3 -続ã- â— Ext2: – 16Tbyte partition size – 4Tbyte file size – BSD Fast File Systemã‚’æ„è˜ã—ãŸ
ZFSã¨Linux - Prex-組ã¿è¾¼ã¿ãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ OS開発日記
Linux: ZFS, Licenses and Patents (http://kerneltrap.org/node/8066)最近ã€ZFSã¯FreeBSDã«ç§»æ¤ã•ã‚ŒãŸã‚‰ã—ã„ãŒã€Linuxã§ã®ZFS利用ã«é–¢ã—ã¦ã¯å•é¡ŒãŒï¼’ã¤ã‚るらã—ã„。ライセンスã®å•é¡Œ ZFSã®ãƒ©ã‚¤ã‚»ãƒ³ã‚¹ã§ã‚ã‚‹CDDLã¯GPLã¨çŸ›ç›¾ã™ã‚‹ã€‚よã£ã¦ã€ãã®ã‚³ãƒ¼ãƒ‰ã‚’GPLã®Linuxã«ã¯ãƒªãƒ³ã‚¯ã§ããªã„。誰ã‹ãŒGPLã§ãƒã‚¤ãƒŠãƒªãƒ»ã‚³ãƒ³ãƒ‘ãƒã®å†å®Ÿè£…ã‚’ã™ã‚‹ã—ã‹ãªã„。パテントã®å•é¡Œ Sunã¯ZFSã«é–¢ã—ã¦ãŸãã•ã‚“ã®ãƒ‘テントをファイルã—ã¦ã„る（æ出ã—ã¦ã„ã‚‹ã ã‘ã§ï¼•ï¼–個）。ã ã‹ã‚‰ã€ãŸã¨ãˆå†å®Ÿè£…ã—ã¦ã‚‚ã€ãれを利用ã™ã‚‹ã“ã¨ã¯ã§ããªã„。ãã‚Œã«ã€ç‰¹è¨±ä½¿ç”¨æ–™ã®æ”¯æ‰•ã„ãŒå¿…è¦ãªæŠ€è¡“ã‚’å«ã‚€ã‚³ãƒ¼ãƒ‰ã¨ã„ã†ã®ã¯ã€ãã‚‚ãã‚‚GPLã§ã¯é…布ã§ããªã„事ã«ãªã£ã¦ã„る。「ã¾ãã§ã‚‚ã€ãã‚Œã¯SunãŒæ±ºã‚る事ãŸã‚ˆã。ã€ã€Œã˜ã‚ƒã‚FUSEã§CDDLã®ã¾ã¾ãªã‚‰ã‚ªãƒƒã‚±ãƒ¼ï¼Ÿã€ã¨ã‹ã„ã†è©±ã€‚CD
リãƒãƒ¼ãƒˆï¼šç¬¬5回 Linux Foundation Japan Symposium──Linuxカーãƒãƒ«å¤©æ°—äºˆå ± | OSDN Magazine
Linux Foundation Japanã¯7月10æ—¥ã€æ±äº¬éƒ½å†…ã§Linux開発者å‘ã‘ã®ã‚·ãƒ³ãƒã‚¸ã‚¦ãƒ 「第5回 Linux Foundation Japan Symposiumã€ã‚’開催ã—ãŸã€‚ åŒã‚·ãƒ³ãƒã‚¸ã‚¦ãƒ ã§ã¯ã€æ¯Žå›žæœ€åˆã«ã€ŒLinux Kernel Weather Forecastã€ã¨ã„ã†Linuxカーãƒãƒ«ã®é–‹ç™ºçŠ¶æ³ã¨çŸæœŸçš„（数ヶ月～1年）ãªå°†æ¥åƒã‚’å ±å‘Šã™ã‚‹è¬›æ¼”ãŒè¡Œã‚れるã®ãŒæ’例ã¨ãªã£ã¦ã„ã‚‹ã€‚å¤©æ°—äºˆå ±ï¼ˆWeather Forecast）ã¨é¡Œã•ã‚Œã¦ã„ã‚‹ã®ã¯ã€ã‚³ãƒŸãƒ¥ãƒ‹ãƒ†ã‚£ã§é–‹ç™ºã•ã‚Œã¦ã„ã‚‹Linuxカーãƒãƒ«ã«ã¯ç¢ºå®šã—ãŸãƒãƒ¼ãƒ‰ãƒžãƒƒãƒ—ã¨ã„ã†ã‚‚ã®ãŒå˜åœ¨ã—ãªã„ãŸã‚ã 。 今回「Linux Kernel Weather Forecastã€ã®è¬›æ¼”ã‚’è¡Œã£ãŸã®ã¯ã€LWN.netã®Jonathan Corbetæ°ã€‚æ°ã¯ã€ã€Œã‚³ãƒ¼ãƒ‰ã®ãƒžãƒ¼ã‚¸æœŸé–“（Merge Window）ãŒ2週間ã§ãã®å¾Œã®8～12週間ã¯å®‰å®šåŒ–（Stab
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