Re: [POT] Which journalised filesystem ? (fwd)

From: Stephen C. Tweedie (sct@redhat.com)
Date: Fri Oct 05 2001 - 05:31:46 EST


Hi,

On Wed, Oct 03, 2001 at 08:01:03PM +0200, Bernd Eckenfels wrote:
>
> Do you had NFS Problems or do you had filesystem problems?
>
> Because NFS interaction with Journaled Filesystems is/was an issue with
> those recent kernels, as far as i understand.

Should be fine with ext3 and XFS. It's not a journaling problem as
much as NFS assuming a particular property of the filesystem.

Resierfs had a particular difficulty with NFS, mainly because the NFS
spec assumes that every file can be looked up by a 64-bit cookie which
doesn't change over reboots, and that's a hard invariant to deal with
when you've only got 32-bit inode numbers in the kernel and when your
filesystem is tree-structured so that the file metadata on disk can
move about. The VFS has been extended a bit in more recent kernels to
allow Reiserfs to give NFS the hints it needs to get the file handles
right.

Cheers,
 Stephen
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