[Linux-cluster] RHEL4.0 CS and Ldap

[Kovacs, Corey J.]

You might be able to, but it's not really cluster related. You'll get
better information on the openldap lists.


Cheers.



Corey 

-----Original Message-----
From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of Baesso Mirko
Sent: Thursday, March 09, 2006 9:00 AM
To: linux clustering
Subject: R: [Linux-cluster] RHEL4.0 CS and Ldap

Sorry but i try to use sync-replica either then slurpd on openldap 2.3, can i
setup a multi-master environment?


Baesso Mirko - System Engineer
KSolutions.S.p.A.
Via Lenin 132/26
56017  S.Martino Ulmiano (PI) - Italy
tel.+ 39 0 50 898369 fax. + 39 0 50 861200
baesso at ksolutions.it   http//www.ksolutions.it

-----Messaggio originale-----
Da: Kovacs, Corey J. [mailto:cjk at techma.com]
Inviato: giovedì 9 marzo 2006 14.43
A: linux clustering
Oggetto: 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 at redhat.com
[mailto:linux-cluster-bounces at 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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