Re: Mirror Mode, replicas and delta-syncrepl
Sam Tran <[email protected]>
| Newsgroups | gmane.network.openldap.general |
|---|---|
| Message-ID | <[email protected]> |
On Thu, Oct 22, 2009 at 6:47 PM, Quanah Gibson-Mount <[email protected]> wrote: > --On Thursday, October 22, 2009 4:34 PM -0400 Sam Tran <[email protected]> > wrote: > >> Hi All, >> >> I am looking to upgrade our OL 2.3 platform to OL 2.4. >> >> For all write operations, I'd like to have two masters in Mirror Mode >> configuration and behind a load balancer with a virtual IP (VIP) >> address. All read operations will be performed on a set of replicas. >> The replication mode would be delta-syncrepl. I am trying to figure >> out how to configure replication between the replicas and the masters. >> I came across those two threads that seem to address this issue: >> >> http://www.openldap.org/lists/openldap-devel/200903/msg00085.html >> http://www.openldap.org/lists/openldap-software/200903/msg00127.html >> >> If I understand correctly, there are two possible configurations: >> >> 1) On each replica, create a single syncrepl stanza that points to the >> load balancer VIP. >> >> 2) On each replica, creates two syncrepl stanzas, each one pointing to >> a different master. >> >> Could you please confirm that both configurations would work? Should >> the second configuration be favored over the first for it does not >> depend on the load balancer? > > I don't know the answer, but let me know when you figure it out. ;) I'd > guess the first option would be best, since only one master will be > receiving the writes as well, since you'll be using mirror mode. > I was planning to use the load balancer in the 2nd configuration as well. In both cases only a single master will receive the write requests. The 2nd configuration would still work in the event of a failure of the load balancer.