search for: defragger

Displaying 10 results from an estimated 10 matches for "defragger".

2005 Mar 02
3
searching for ext3 defrag/file move program
Hello everybody, reading about the speed improvements possible with (on boot) preloaded files (which should be continuous on disk) I searched for a ext3 defrag program. I found an ext2 defrag program (http://www.ibiblio.org/pub/Linux/system/filesystems/defrag-0.70.tar.gz, available in debian as defrag) which would have an optimal feature (moving files by a list) but refuses to work on ext3.
2009 Sep 15
1
FYI: Why is NFS slower on EL5 than EL4?
...mends disabling this latency to get around it, but in doing that you might as well just use the deadline scheduler. Some other interesting tidbits for those using NFS. NFS with many nfsd threads will create a lot of file system fragments when writing large files. XFS does have the advantage of a defragger (I hope some smart person will develop one for ext2/3/4), but I am still looking for a better way to protect against fragmentation then running a defragger, so if anyone has an alternative I'm all ears. Another hint for those using NFS with ESX, make sure your vmdk partitions are 4k aligned or...
2007 Feb 12
17
NFS/ZFS performance problems - txg_wait_open() deadlocks?
Hi. System is snv_56 sun4u sparc SUNW,Sun-Fire-V440, zil_disable=1 We see many operation on nfs clients to that server really slow (like 90 seconds for unlink()). It''s not a problem with network, there''s also plenty oc CPU available. Storage isn''t saturated either. First strange thing - normally on that server nfsd has about 1500-2500 number of threads. I did
2005 Dec 16
1
Repacking files on ext3?
...that previous thread, it was stated that it was impossible to have defrag work safely on an ext3 partition. I do not see why this is so. If ext2 could be given a journal to make it crash resistant, then why can't defrag be given the same thing? Another comment was made saying that such a defragger could not possibly be done only in userspace. Unless you're talking about online defragmentation, then manipulating the filesystem offline to repack it is entirely possible from userspace. Is there still no way to do what I am trying? P.S. Please CC me on replies, as I am not subscribed.
2012 Jan 07
14
zfs defragmentation via resilvering?
Hello all, I understand that relatively high fragmentation is inherent to ZFS due to its COW and possible intermixing of metadata and data blocks (of which metadata path blocks are likely to expire and get freed relatively quickly). I believe it was sometimes implied on this list that such fragmentation for "static" data can be currently combatted only by zfs send-ing existing
2010 Oct 17
10
RaidzN blocksize ... or blocksize in general ... and resilver
The default blocksize is 128K. If you are using mirrors, then each block on disk will be 128K whenever possible. But if you''re using raidzN with a capacity of M disks (M disks useful capacity + N disks redundancy) then the block size on each individual disk will be 128K / M. Right? This is one of the reasons the raidzN resilver code is inefficient. Since you end up waiting for the
2012 Apr 26
7
[PATCH 2/4] Btrfs: fix deadlock on sb->s_umount when doing umount
The reason the deadlock is that: Task Btrfs-cleaner umount() down_write(&s->s_umount) sync_filesystem() do auto-defragment and produce lots of dirty pages close_ctree() wait for the end of btrfs-cleaner start_transaction reserve space shrink_delalloc() writeback_inodes_sb_nr_if_idle()
2010 Jan 18
18
Is ZFS internal reservation excessive?
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 zpool and zfs report different free space because zfs takes into account an internal reservation of 32MB or 1/64 of the capacity of the pool, what is bigger. So in a 2TB Harddisk, the reservation would be 32 gigabytes. Seems a bit excessive to me... - -- Jesus Cea Avion _/_/ _/_/_/ _/_/_/ jcea at jcea.es -
2011 Aug 23
40
[PATCH 00/21] [RFC] Btrfs: restriper
Hello, This patch series adds an initial implementation of restriper (it''s a clever name for relocation framework that allows to do selective profile changing and selective balancing with some goodies like pausing/resuming and reporting progress to the user. Profile changing is global (per-FS) so far, per-subvolume profiles require some discussion and can be implemented in future.
2011 Oct 04
68
[patch 00/65] Error handling patchset v3
Hi all - Here''s my current error handling patchset, against 3.1-rc8. Almost all of this patchset is preparing for actual error handling. Before we start in on that work, I''m trying to reduce the surface we need to worry about. It turns out that there is a ton of code that returns an error code but never actually reports an error. The patchset has grown to 65 patches. 46 of them