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RE: [Linux-cluster] RHEL4.0 CS and Ldap



Multi master LDAP is not all that it's cracked up to be. There are few
benefits 
in being able to write to different servers. The problem is that like many
things,
the rule is "Last write wins". Writing in LDAP dirs is not something that is 
"typically" done in high volumes anyway, but reading is. If you just need to
load balance traffic, then you might look into an LVS implementation. That
way
you can set up several replicas and spread the load across them. If your
Master
gets blown away, you can promote of the replicas to a master.. Just takes
some
manual intervention.


Just my two cents...


Corey 

-----Original Message-----
From: linux-cluster-bounces redhat com
[mailto:linux-cluster-bounces redhat com] On Behalf Of Nick Burrett
Sent: Thursday, March 09, 2006 4:49 AM
To: linux clustering
Subject: Re: [Linux-cluster] RHEL4.0 CS and Ldap

Rainer Duffner wrote:
> Lon Hohberger wrote:
> 
>> On Wed, 2006-03-08 at 12:43 -0600, Dalton, Maurice wrote:
>>  
>>
>>> Is there a way to create an Ldap cluster that can do replication 
>>> with RHEL 4.0 CS?
>>>   
>>
>>
>> For some reason, I though OpenLDAP had built-in replication?
>>  
>>
> 
> 
> Not multi-master (which I assume is what the original poster wants).
> 
> http://www.redhat.com/en_us/USA/home/solutions/directoryserver/
> 
> exists for a reason...

As I understand it, multi-master can be accomplished in OpenLDAP 2.3 using
sync-replication between the two nodes.  This is not true multi-master, but
the effect is near-enough.

Regards,

Nick.

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