1:11 a.m.
----- "Alejandro Leyva" <alex.leyva(a)gmail.com> wrote:
Hi all.
We are implementing a solution with multi master LDAP, we have 11
instances at different locations, and maybe we will grow to 21 or 31
instances before the end of the year, expecting to hold something
like
200,000 or 300,000 user entries. What topology would be the best?
Right now each server synch to all the other servers, is it possible
to configure each server to synch only to a central LDAP? is it
convenient?
Then that is not Multi-Master, but normal Provider/Consumer replication.
Depending on your client requirements for writing, you may be better served
using MirrorMode and numerous consumers/slaves with the chaining overlay to push writes
back to the master. This would be simpler for monitoring write propagation.
See the diagram here http://www.openldap.org/doc/admin24/replication.html#MirrorMode
--
Kind Regards,
Gavin Henry.
Managing Director.
T +44 (0) 1224 279484
M +44 (0) 7930 323266
F +44 (0) 1224 824887
E ghenry(a)suretecsystems.com
Open Source. Open Solutions(tm).
http://www.suretecsystems.com/
Suretec Systems is a limited company registered in Scotland. Registered
number: SC258005. Registered office: 13 Whiteley Well Place, Inverurie,
Aberdeenshire, AB51 4FP.
Subject to disclaimer at http://www.suretecgroup.com/disclaimer.html
1:46 p.m.
New subject: Multi master topology.
Thanks for the answer, but we need write access from all of our
instances, so mirror mode isn't a viable solution for us. By
definition, only Multi Master will serve this requierements right?
Multi Master require that all the instances are defined into all the instances?
Thanks in advance.
On Mon, Jul 13, 2009 at 3:11 AM, Gavin Henry<ghenry(a)suretecsystems.com> wrote:
----- "Alejandro Leyva" <alex.leyva(a)gmail.com> wrote:
> Hi all.
>
> We are implementing a solution with multi master LDAP, we have 11
> instances at different locations, and maybe we will grow to 21 or 31
> instances before the end of the year, expecting to hold something
> like
> 200,000 or 300,000 user entries. What topology would be the best?
> Right now each server synch to all the other servers, is it possible
> to configure each server to synch only to a central LDAP? is it
> convenient?
Then that is not Multi-Master, but normal Provider/Consumer replication.
Depending on your client requirements for writing, you may be better served
using MirrorMode and numerous consumers/slaves with the chaining overlay to push writes
back to the master. This would be simpler for monitoring write propagation.
See the diagram here http://www.openldap.org/doc/admin24/replication.html#MirrorMode
--
Kind Regards,
Gavin Henry.
Managing Director.
T +44 (0) 1224 279484
M +44 (0) 7930 323266
F +44 (0) 1224 824887
E ghenry(a)suretecsystems.com
Open Source. Open Solutions(tm).
http://www.suretecsystems.com/
Suretec Systems is a limited company registered in Scotland. Registered
number: SC258005. Registered office: 13 Whiteley Well Place, Inverurie,
Aberdeenshire, AB51 4FP.
Subject to disclaimer at http://www.suretecgroup.com/disclaimer.html
2:39 a.m.
New subject: Multi master topology.
----- "Alejandro Leyva" <alex.leyva(a)gmail.com> wrote:
Thanks for the answer, but we need write access from all of our
instances, so mirror mode isn't a viable solution for us. By
definition, only Multi Master will serve this requierements right?
Not quite true. The previous solution I discussed with MirrorMode and consumers using the
chaining overlay allows any of your clients to write to a consumer/slave from their point
of
view. Behind the scenes the slaves are forwarding writes back to you active MirrorMode
node in
the MirrorMode pair.
So the benefits of this versus global multi-master:
1. All clients can write to their local consumer/s.
2. You only need to allow write access from known slaves/consumers/networks not any old
client.
3. A write only need to propogate from a client to consumer to MirrorMode node, not every
other Master.
There are many more pros and cons so feel free to ask more questions.
Multi Master require that all the instances are defined into all the
instances?
Thanks in advance.
--
Kind Regards,
Gavin Henry.
Managing Director.
T +44 (0) 1224 279484
M +44 (0) 7930 323266
F +44 (0) 1224 824887
E ghenry(a)suretecsystems.com
Open Source. Open Solutions(tm).
http://www.suretecsystems.com/
Suretec Systems is a limited company registered in Scotland. Registered
number: SC258005. Registered office: 13 Whiteley Well Place, Inverurie,
Aberdeenshire, AB51 4FP.
Subject to disclaimer at http://www.suretecgroup.com/disclaimer.html
5076
days inactive
5077
days old
openldap-technical@openldap.org
2 comments
2 participants
participants (2)
-
Alejandro Leyva -
Gavin Henry