http://linuxfs.pbwiki.com/ RecentChanges for linuxfs http://linuxfs.pbwiki.com/feedlogo.gif http://pbwiki.com/ PBwiki 3.7 support@pbwiki.com http://linuxfs.pbwiki.com/EasyFsProjects email.hidden@example.com (Andreas Dilger) Andreas Dilger edited EasyFsProjects Looking for a simple file systems project to work on? Try one of the following. The contact is the IRC nick of someone on #linuxfs you can talk to to find out more about the project. If you can also be a contact for a project, please add yourself as one.
people. Need to demonstrate benefit This is being driven by the POSIX High End Computing Extensions Working Group http://www.opengroup.org/platform/hecewg/ for this feature, other than on Lustre. distributed filesystems.
SEEK_HOLE, SEEK_DATA - New parameters to seek() asking for the next part of the file with data in it. As it currently stands, even if a file is sparse on disk, the file system still has to shovel zeroes out through the read() system call. Some applications, such as archivers or backup programs, can make good use of an interface that says, e.g., the next 8MB of the file are all zeroes, instead of having to read 8MB of zeroes. See the following: http://blogs.sun.com/roller/page/bonwick?]]> Thu, 22 May 2008 13:12:49 +0000 mod http://linuxfs.pbwiki.com/FrontPage email.hidden@example.com (Eric) Eric edited FrontPage FutureGnomeVFS
Ext4(andExt2/Ext3)Wiki
XFSWiki
Other File System Related Mailing Lists
StorageResearchmailinglist (Academic and Industrial R&D in Storage)
]]> Wed, 21 May 2008 21:02:43 +0000 mod http://linuxfs.pbwiki.com/FrontPage email.hidden@example.com (Valerie Henson) Valerie Henson edited FrontPage Linux file systems development, Unlimited
I am aThis wiki for Linux file systems development. Please is no longer maintained and most of the information therein is out of date. If you would like to edit me! The it, the password is linuxfs.
I will be deleted by May 16th, 2008, unless someone volunteers to maintain me.
-- Huh? Why does a wiki page need to be "maintained"? And what could possibly be gained by deleting it? linuxfs.
Contact us
Chat with us on IRC:
]]> Fri, 16 May 2008 15:40:26 +0000 mod http://linuxfs.pbwiki.com/FrontPage email.hidden@example.com (jibal) jibal edited FrontPage I am a wiki for Linux file systems development. Please edit me! The password is linuxfs.
I will be deleted by May 16th, 2008, unless someone volunteers to maintain me.
-- Huh? Why does a wiki page need to be "maintained"? And what could possibly be gained by deleting it?
Contact us
Chat with us on IRC:
]]> Wed, 07 May 2008 22:35:41 +0000 mod http://linuxfs.pbwiki.com/FrontPage email.hidden@example.com (Val) Val edited FrontPage Linux file systems development, Unlimited
I am a wiki for Linux file systems development. Please edit me! The password is linuxfs.
I will be deleted by May 16th, 2008, unless someone volunteers to maintain me.
Contact us
Chat with us on IRC:
]]> Wed, 16 Apr 2008 17:57:05 +0000 mod http://linuxfs.pbwiki.com/SideBar email.hidden@example.com (eric) eric removed SideBar]]> Tue, 15 Apr 2008 19:53:46 +0000 del http://linuxfs.pbwiki.com/SideBar email.hidden@example.com (1234) 1234 edited SideBar edukacja
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]]> Tue, 15 Apr 2008 19:41:12 +0000 mod http://linuxfs.pbwiki.com/SideBar.1208313672 email.hidden@example.com (eric) eric removed SideBar.1208313672]]> Tue, 15 Apr 2008 19:41:12 +0000 del http://linuxfs.pbwiki.com/EasyFsProjects email.hidden@example.com (J. Bruce Fields) J. Bruce Fields edited EasyFsProjects Some kind of hook into the disk EIO reporting which allows file systems to register a handler which does things like set the "fsck me now" bit. Contact: valh
Lazy atime - Keep atime in memory, only update it on-disk when the inode will be written out for some other reason (basically, don't dirty the inode on an atime update). This is as opposed to plain old noatime - see touch_atime() in fs/inode.c. Contact: valh Update I wrote both a lazy atime and a relative atime, see: http://infohost.nmt.edu/~val/patches.html#relatime
here: http://wiki.linux-nfs.org/wiki/index.php/To_do. http://wiki.linux-nfs.org/wiki/index.php/To_do Contact: bfields
]]> Mon, 13 Aug 2007 07:30:40 +0000 mod http://linuxfs.pbwiki.com/EasyFsProjects email.hidden@example.com (J. Bruce Fields) J. Bruce Fields edited EasyFsProjects Some kind of hook into the disk EIO reporting which allows file systems to register a handler which does things like set the "fsck me now" bit. Contact: valh
Lazy atime - Keep atime in memory, only update it on-disk when the inode will be written out for some other reason (basically, don't dirty the inode on an atime update). This is as opposed to plain old noatime - see touch_atime() in fs/inode.c. Contact: valh Update I wrote both a lazy atime and a relative atime, see: http://infohost.nmt.edu/~val/patches.html#relatime
Some entry-level NFS projects here: http://wiki.linux-nfs.org/wiki/index.php/To_do. Contact: bfields
]]> Mon, 13 Aug 2007 07:30:08 +0000 mod http://linuxfs.pbwiki.com/EasyFsProjects email.hidden@example.com (J. Bruce Fields) J. Bruce Fields edited EasyFsProjects Looking for a simple file systems project to work on? Try one of the following. The contact is the IRC nick of someone on #linuxfs you can talk to to find out more about the project. If you can also be a contact for a project, please add yourself as one.
Lazy atime - Keep atime in memory, only update it on-disk when the inode will be written out for some other reason (basically, don't dirty the inode on an atime update). This is as opposed to plain old noatime - see touch_atime() in fs/inode.c. Contact: valh Update I wrote both a lazy atime and a relative atime, see: http://infohost.nmt.edu/~val/patches.html#relatime
Stat with flags - Implement flags to the stat() system call that allow you to say which fields of the stat structure you care about, and which the system can ignore. This can speed up stat() in many common cases. This was proposed to be a feature of the fstatat() system call, passing flags AT_GET_{SIZE,INO,UID,GID,...} to request only the specified fields, and ignoring o]]> Mon, 13 Aug 2007 07:24:17 +0000 mod http://linuxfs.pbwiki.com/EasyFsProjects email.hidden@example.com (EugeneTeo) EugeneTeo edited EasyFsProjects Looking for a simple file systems project to work on? Try one of the following. The contact is the IRC nick of someone on #linuxfs you can talk to to find out more about the project. If you can also be a contact for a project, please add yourself as one.
Lazy atime - Keep atime in memory, only update it on-disk when the inode will be written out for some other reason (basically, don't dirty the inode on an atime update). This is as opposed to plain old noatime - see touch_atime() in fs/inode.c. Contact: valh Update I wrote both a lazy atime and a relative atime, see: http://infohost.nmt.edu/~val/patches.html#relatime
Update Trevor Woerner (tlw) is starting work on this. This This project has been worked on by multiple people. Need to demonstrate benefit for this feature, other than on Lustre.
SEEK_HOLE, SEEK_DATA - New parameters to seek() asking for the next part of the file with ]]> Thu, 09 Aug 2007 19:37:40 +0000 mod http://linuxfs.pbwiki.com/EasyFsProjects email.hidden@example.com (EugeneTeo) EugeneTeo edited EasyFsProjects Looking for a simple file systems project to work on? Try one of the following. The contact is the IRC nick of someone on #linuxfs you can talk to to find out more about the project. If you can also be a contact for a project, please add yourself as one.
Lazy atime - Keep atime in memory, only update it on-disk when the inode will be written out for some other reason (basically, don't dirty the inode on an atime update). This is as opposed to plain old noatime - see touch_atime() in fs/inode.c. Contact: valh Update I wrote both a lazy atime and a relative atime, see: http://infohost.nmt.edu/~val/patches.html#relatime
on this. this. This project has been worked on by multiple people. Need to demonstrate benefit for this feature, other than on Lustre.
SEEK]]> Thu, 09 Aug 2007 19:35:20 +0000 mod http://linuxfs.pbwiki.com/EasyFsProjects no.email.given@example.com (Anonymous) Anonymous edited EasyFsProjects A generically useful library for finding and managing contiguous areas of disk space. Getting the interface right is non-trivial, but there are a lot of concepts which are independent of on-disk file system layout which could be reused. Good starting points are the ext3 reservation code and/or the XFS extent allocation code (the ext2 preallocation code is NOT a good place to start). Short of that, finish and test the port of the ext3 reservation code to ext2, started here: http://infohost.nmt.edu/~val/patches/resv_only_patch Contact: valh
Some kind of hook into the disk EIO reporting which allows file systems to register a handler which does things like set the "fsck me now" bit. Contact: valh
Simple block bitmap sanity checking for ext2/3/4. When a new block bitmap is read from disk in read_block_bitmap() there are a few bits that should ALWAYS be set for each group. In particular, the blocks given by desc->bg_block_bitmap, desc->bg_inode_bitmap, and {desc->bg_inode_ta]]> Fri, 20 Jul 2007 09:58:54 +0000 mod http://linuxfs.pbwiki.com/EasyFsProjects no.email.given@example.com (Anonymous) Anonymous edited EasyFsProjects A generically useful library for finding and managing contiguous areas of disk space. Getting the interface right is non-trivial, but there are a lot of concepts which are independent of on-disk file system layout which could be reused. Good starting points are the ext3 reservation code and/or the XFS extent allocation code (the ext2 preallocation code is NOT a good place to start). Short of that, finish and test the port of the ext3 reservation code to ext2, started here: http://infohost.nmt.edu/~val/patches/resv_only_patch Contact: valh
Some kind of hook into the disk EIO reporting which allows file systems to register a handler which does things like set the "fsck me now" bit. Contact: valh
and bg_inode_table, +sbi->s_itb_per_group">desc->bg_inode_table, +sbi->s_itb_per_group. {desc->bg_inode_table, +sbi->s_itb_per_group}. If any of those those bits (shifted to be relative to the current group, of course]]> Fri, 06 Jul 2007 10:27:36 +0000 mod http://linuxfs.pbwiki.com/EasyFsProjects no.email.given@example.com (Anonymous) Anonymous edited EasyFsProjects Looking for a simple file systems project to work on? Try one of the following. The contact is the IRC nick of someone on #linuxfs you can talk to to find out more about the project. If you can also be a contact for a project, please add yourself as one.
Lazy atime - Keep atime in memory, only update it on-disk when the inode will be written out for some other reason (basically, don't dirty the inode on an atime update). This is as opposed to plain old noatime - see touch_atime() in fs/inode.c. Contact: valh Update I wrote both a lazy atime and a relative atime, see: http://infohost.nmt.edu/~val/patches.html#relatime
cases. This was proposed to be a feature of the fstatat() system call, passing flags AT_GET_{SIZE,INO,UID,GID,...} to request only the specified fields,<]]> Fri, 06 Jul 2007 10:26:45 +0000 mod http://linuxfs.pbwiki.com/chunkfs email.hidden@example.com (Amit Gud) Amit Gud edited chunkfs Val Henson, Arjan van de Ven, Amit Gud and Zach Brown. Chunkfs: Using divide-and-conquer to improve file system reliability and repair in USENIX Hot Topics in System Dependability, 2006 http://www.usenix.org/events/hotdep06/tech/prelim_papers/henson/henson.pdf
Source Code
Initial implementation forChunkFS git tree: git://git.kernel.org/pub/scm/linux/kernel/git/gud/chunkfs.git
ChunkFS FUSE git tree: git://git.kernel.org/pub/scm/linux/kernel/git/gud/fuse-chunkfs.git
ChunkFS tools: git://git.kernel.org/pub/scm/linux/kernel/git/gud/chunkfs-tools.git
ChunkFS How To
Compiling Tools and Making File System
1. Download tools from git://git.kernel.org/pub/scm/linux/kernel/git/gud/chunkfs-too]]> Thu, 05 Jul 2007 19:15:08 +0000 mod http://linuxfs.pbwiki.com/SideBar no.email.given@example.com (Anonymous) Anonymous edited SideBar test
]]> Sat, 09 Jun 2007 05:56:57 +0000 mod http://linuxfs.pbwiki.com/SideBar no.email.given@example.com (Anonymous) Anonymous edited SideBar test
]]> Sat, 09 Jun 2007 05:56:09 +0000 mod http://linuxfs.pbwiki.com/SideBar email.hidden@example.com (Nathan Schmidt) Nathan Schmidt edited SideBar sklep
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