Re: How git affects kernel.org performance

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Jan 7 2007 10:03, Willy Tarreau wrote:
>On Sun, Jan 07, 2007 at 12:58:38AM -0800, H. Peter Anvin wrote:
>> >[..]
>> >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.

Then make sure noone releases a kernel ;-)

>> However, if there is credible reasons to believe XFS will help, I'd be 
>> inclined to try it out.
>
>Hmmm I'm thinking about something very dirty : would it be possible
>to reduce the current FS size to get more space to create another
>FS ? Supposing you create a XX GB/TB XFS after the current ext3,
>you would be able to mount it in some directories with --bind and
>slowly switch some parts to it. The problem with this approach is
>that it will never be 100% converted, but as an experiment it might
>be worth it, no ?

Much better: rsync from /oldfs to /newfs, stop all ftp uploads, rsync
again to catch any new files that have been added until the ftp
upload was closed, then do _one_ (technically two) mountpoint moves
(as opposed to Willy's idea of "some directories") in a mere second
along the lines of

  mount --move /oldfs /older; mount --move /newfs /oldfs.

let old transfers that still use files in /older complete (lsof or
fuser -m), then disconnect the old volume. In case /newfs (now
/oldfs) is a volume you borrowed from someone and need to return it,
well, I guess you need to rsync back somehow.


	-`J'
-- 
-
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Kernel Development]     [Gcc Help]     [IETF Annouce]     [DCCP]     [Netdev]     [Networking]     [Security]     [V4L]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux SCSI]     [Fedora Users]