Messages in this thread | | | Date | Sun, 07 Jan 2007 00:58:38 -0800 | From | "H. Peter Anvin" <> | Subject | Re: How git affects kernel.org performance |
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Willy Tarreau wrote: > > At work, we had the same problem on a file server with ext3. We use rsync > to make backups to a local IDE disk, and we noticed that getdents() took > about the same time as Peter reports (0.2 to 2 seconds), especially in > maildir directories. We tried many things to fix it with no result, > including enabling dirindexes. Finally, we made a full backup, and switched > over to XFS and the problem totally disappeared. So it seems that the > filesystem matters a lot here when there are lots of entries in a > directory, and that ext3 is not suitable for usages with thousands > of entries in directories with millions of files on disk. I'm not > certain it would be that easy to try other filesystems on kernel.org > though :-/ >
Changing filesystems would mean about a week of downtime for a server. It's painful, but it's doable; however, if we get a traffic spike during that time it'll hurt like hell.
However, if there is credible reasons to believe XFS will help, I'd be inclined to try it out.
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