Re: [BackupPC-users] Which FS?
2009-08-31 11:52:54
Christian Völker wrote:
>> With backuppc the issue is not so much fragmentation within a file as
>> the distance between the directory entry, the inode, and the file
>> content. When creating a new file, filesystems generally attempt to
>> allocate these close to each other, but when you link an existing file
>> into a new directory, that obviously can't be done so you end up with a
>> lot of long seeks when you try to traverse directories picking up the
>> inode info.
> Makes sense to me. Is there any FS which would be recommended for best
> performance?
>
> Thanks for hints...
Starting completely from scratch I'd probably try OpenSolaris/zfs and
use its snapshot send/receive for offsite copies. With Linux, probably
xfs on a 64-bit version. These are based on reading about their
features, not actual testing, though. Realistically, if you are going
to mostly fill a drive with data, you can expect the head to have to
move around a lot to access it regardless of any magic in the filesystem
- and moving the head is still a slow operation that makes everything
else wait.
By the way, I've seen some reports that RHEL 5.4 (in beta now) includes
support for xfs - so it will probably also be in the stock CentOS
kernel soon.
--
Les Mikesell
lesmikesell AT gmail DOT com
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- Re: [BackupPC-users] Keeping servers in sync, (continued)
- Re: [BackupPC-users] Keeping servers in sync, Jim Wilcoxson
- Re: [BackupPC-users] Keeping servers in sync, Michael Stowe
- Re: [BackupPC-users] Keeping servers in sync, Les Mikesell
- Re: [BackupPC-users] Which FS? (was: Keeping servers in sync), Christian Völker
- Re: [BackupPC-users] Which FS? (was: Keeping servers in sync), Tino Schwarze
- Re: [BackupPC-users] Which FS?,
Les Mikesell <=
- Re: [BackupPC-users] Which FS? (was: Keeping servers in sync), Jon Craig
- Re: [BackupPC-users] Which FS?, Les Mikesell
- Re: [BackupPC-users] Which FS?, higuita
- [BackupPC-users] 2.x behavior desired on 3.1 install, James Ward
- Re: [BackupPC-users] Which FS?, Jim Leonard
- Re: [BackupPC-users] Keeping servers in sync, Jim Leonard
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