Making Replication Robust
dpc22 at cam.ac.uk
Tue Oct 9 09:07:31 EDT 2007
On Mon, 8 Oct 2007, Bron Gondwana wrote:
> We already run a sync_server on our masters as well because we use it
> for user moves:
> Generally takes about 15 seconds for the "critical path" bit, and
> the initial sync doesn't matter how long it takes.
As do we. In fact when I first showed the replication system to Rob
Siemborski (few a years back now), he was thinking about using replication
to replace XFER in a murder environment.
I have a special "-y" flag to sync_client which disables fsync() on the
replica for fast seeding of replicas. We also use replication to dump data
from the live systems to a tape spooling array each night. Replication is
transaction safe rsync for Cyrus, tailored around the cyrus.index files.
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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