|From:||Ryusuke Konishi <firstname.lastname@example.org>|
|To:||Andrew Morton <email@example.com>|
|Subject:||[PATCH 0/27] nilfs2: continuous snapshotting file system|
|Date:||Mon, 15 Sep 2008 04:07:57 +0900|
This is a new patch set for the nilfs2 file system. The first submission is found at: http://marc.info/?l=linux-fsdevel&m=121920195516073 The old patch was not divided, and this time I divided it into 27 patches: The patch #1 adds a document to Documentation/filesystems/ The patch #2 adds a header file of the disk format to include/linux/ The patches #2-#26 adds nilfs2 source files to fs/nilfs2/ and the patch #27 updates Makefile and Kconfig. This patch set also includes some cleanups and improvements. The main changes from the previous patch are as follows: * Use the standard mm/ cache instead of uniquely implemented page cache to hold B-tree node buffers; the peculiar page cache was removed by this. * Integrate two similar allocators found in DAT and inode file. * Read requests for GC blocks are now submitted in parallel to mitigate GC overhead. More than 2,000 lines are reduced by the cleanups. The patch set is available from http://www.nilfs.org/pub/patch/nilfs2-2.6.27-rc6/ If you like a git tree: http://git.nilfs.org/nilfs2-2.6.git nilfs2 ( gitweb: http://www.nilfs.org/git/?p=nilfs2-2.6.git ) The userland tools are included in the nilfs-utils package which is available on http://www.nilfs.org/en/download.html Example: In this example, /dev/sdb1 is used as a nilfs2 partition. - To use nilfs2 as a local file system, simply: # mkfs -t nilfs2 /dev/sdb1 # mount -t nilfs2 /dev/sdb1 /dir This will also invoke the cleaner through the mount helper program (mount.nilfs2). - Checkpoints and snapshots are managed by the following commands. Their manpages are included in the nilfs-utils package. lscp list checkpoints or snapshots. mkcp make a checkpoint or a snapshot. chcp change an existing checkpoint to a snapshot or vice versa. rmcp invalidate specified checkpoint(s). For example, # lscp /dev/sdb1 will list checkpoints on the device. The block device argument is omissible if there is no other nilfs2 partition. # chcp ss 2 will change the past checkpoint No. 2 into snapshot. # mkcp -s will make a snapshot of the current state. # lscp -s will list snapshots - To mount a snapshot, use the read-only option and cp= option. # mount -t nilfs2 -r -o cp=<cno> /dev/sdb1 /snap_dir where <cno> is the checkpoint number of the snapshot. Snapshots are mountable concurrently with the writable mount. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to firstname.lastname@example.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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