[DRBD-user] drbd and gfs
Diego Julian Remolina
diego.remolina at ibb.gatech.edu
Wed Oct 25 13:50:00 CEST 2006
Alexander Lind wrote:
> My portuguese is a little rusty (there does not seem to be an english
> version), but I see that he uses drbd 0.8. That is the the caveat I
> suppose, that it can be done with drbd 0.8.x, not 0.7.x, correct?
That is correct, 0.7.x does *not* support active/active
> Do you have any idea of when a production-ready version of 0.8.x could
> be expected?
The answer you will get for this one is: When is ready!
> As far as the apps go, I was going to use the shared partitions for
> network shares (file storage and propagation etc), and also Courier
> Imapd. I don't forsee any problems with the files, and as far I have
> understood, Courier Imapd with its maildirs (instead of spools) should
> not have any problems either. Please correct me if you think I'm wrong :)
I think this should be ok, I do not use courier, but I assume that if you have postfix or sendmail
as your MTA which runs independently on each machine and that delivers to courier on a separate
socket file (or at least that is how cyrus imap works) on each machine then courier should be able
to deliver mail to your shared active/active storage (maildir mailboxes).
I currently run in production sedmail+mimedefang+clamav+spamassain+cyrus-imap using drbd-0.7.21 on
RHEL4 and that has worked perfectly for over a year (off course drbd has been updated over time). My
web server uses drbd-0.7.21 and has a horde/imp installation for web mail. I could share my install
notes on request (e-mail me off-list), but I have to warn you that they are not totally complete. I
plan to turn them into a good howto when I upgrade my servers to RHEL5.
> Diego Julian Remolina wrote:
>> Yes that is possible, depending on the application you want to run.
>> For example it may not be doable for e-mail unless the MTA you are
>> using knows how to share a mail spool. As long as your application can
>> work with two machines having access to the same files or folders then
>> you should be ok. An alternative to GFS is ocfs2 which is also a
>> clustered file system. A guy from brazil wrote a howto for drbd and
>> ocfs2 (it may only be in portuguesse, I am not sure if he has an
>> english version):
>> IMPORTANT: At this point, drbd-0.8.X is not stable and should not be
>> used in production environments. Some people may already use it in
>> production, but it is not recommended. If you do it, you may be
>> risking too much.
>> Alexander Lind wrote:
>>> Hello All
>>> I have read that you can achieve a shared storage solution by
>>> combining GFS and DRBD somehow.
>>> The idea being making it so i can have a shared and mirrored
>>> partition on two separate machines connected via tcp/ip, that gives
>>> each machine full r/w access.
>>> Is this possible? Is using GFS / DRBD the answer? Are there better
>>> Unfortunately I can't seem to find much info about this on the net,
>>> so I'm hoping someone here can help me out! :)
>>> drbd-user mailing list
>>> drbd-user at lists.linbit.com
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