Kris Kennaway wrote:
> On Fri, Sep 01, 2006 at 11:08:51AM -0700, Paul Lathrop wrote:
>> Hi all,
>> We're working on deploying a new mail server on FreeBSD 6.1-STABLE. One
>> of the major selling points was the ability to take filesystem snapshots
>> in order to make backups from a consistent filesystem on such a
>> high-traffic system. Unfortunately, when I take a snapshot, performance
>> slows to a crawl - to the point where the system stops responding to
>> network requests (ping, SMTP, etc.). Also, the snapshot takes 10-15
>> minutes to complete.
>> Is this a typical situation? Will I need to schedule downtime for
>> backups in spite of this nifty new feature? Am I doing something wrong?
> Time depends on the size of the filesystem - but you are correct that
> snapshots were not designed with performance in mind (rather, to speed
> up booting after an unclean shutdown by removing the need to wait for
> fsck).
> Kris
Are there plans to improve performance of snapshots? Using the
freebsd-snapshot port to link FS snapshots to the automounter is pretty
nifty, but it does kill I/O performance while that's in progress as the
OP mentioned.

-- Skylar Thompson ([EMAIL PROTECTED])

Attachment: signature.asc
Description: OpenPGP digital signature

Reply via email to