Cyrus replication scaling

2012-03-22 Thread Egoitz Aurrekoetxea
Hi,

I have a mailbox machine with near 6000 users. This machine is having some
delay on the replication. I'm debugging the replication and have seen twice
some problems with two users in they're seen database which I solved
basically removing the seen databases of this two users and running a
reconstruct -r -f (later seen invocations have worked for one unless of
this users). This machine has been created by doing manual replications of
two servers that where running cyrusimap 2.3.14 and this new one runs
2.3.18 which has the delays (although in greetings sais is 2.3.16, I assume
perhaps this has forgotten to be changed in some banner field at code). Is
there any advise for speeding replication?. I have sync_repeat_interval to
one second (default). Is it normal replication to have some delay on
perhaps busy servers?. We have joined two servers in one and have a
master-slave replication now.

Thanks a lot for you're answer in advance.
Bye!

-- 
Egoitz Aurrekoetxea

Cyrus Home Page: http://www.cyrusimap.org/
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Re: Cyrus replication scaling

2012-03-22 Thread Adam Tauno Williams
On Thu, 2012-03-22 at 11:19 +0100, Egoitz Aurrekoetxea wrote
 I have a mailbox machine with near 6000 users. This machine is having
 some delay on the replication. I'm debugging the replication and have
 seen twice some problems with two users in they're seen database which
 I solved basically removing the seen databases of this two users and
 running a reconstruct -r -f (later seen invocations have worked for
 one unless of this users). This machine has been created by doing
 manual replications of two servers that where running cyrusimap 2.3.14
 and this new one runs 2.3.18 which has the delays (although in
 greetings sais is 2.3.16, I assume perhaps this has forgotten to be
 changed in some banner field at code). Is there any advise for
 speeding replication?. I have sync_repeat_interval to one second
 (default). Is it normal replication to have some delay on perhaps busy
 servers?. We have joined two servers in one and have a
 master-slave replication now.

There are train loads of bug fixes since 2.3.x,  many of which relate to
replication and database consistency.  Not to mention that later 2.4.x
versions have a significant performance benefit.


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