LARGE single-system Cyrus installs?
dpc22 at cam.ac.uk
Tue Nov 13 05:24:22 EST 2007
On Sun, 11 Nov 2007, Bron Gondwana wrote:
>> 250,000 mailboxes, 1,000 concurrent users, 60 million emails, 500k
>> deliveries/day. For us, backups are the worst thing, followed by
>> reiserfs's use of BLK, followed by the need to use a ton of disks to
>> keep up with the i/o.
> For us backups are hardly a blip on the radar :) The joy of writing
> your own custom backup system that knows more about Cyrus internals than
> just about anything else. It starts with some stat calls, and if any of
> the cyrus.header, cyrus.index or cyrus.expunge files have changed then
> it will lock them all then stream them all to the backup server.
Cyrus is pretty ideal for fast incremental updates to a backup system:
hence replication. You shouldn't need to lock anything with delayed
expunge, delayed delete and fast rename in place.
David Carter Email: David.Carter at ucs.cam.ac.uk
University Computing Service, Phone: (01223) 334502
New Museums Site, Pembroke Street, Fax: (01223) 334679
Cambridge UK. CB2 3QH.
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