Re: ldap load measuring and reproduction tools

[Mike Jackson <mj@sci.fi>]

J.Smith wrote:
> The current plans are to add a total of about 10 to 20 ldap replicas to the
> master.  However, this raised some questions. For example, there might be
> a real world practical limit (or even theoretical limits) to the amount of
> replica's you can add to a master server. Another concern is that the 
> master
> might be spending all of its time synchronizing the replica's, without 
> being
> able to answer any request/updates any more, or will at the least require
> significant hardware upgrades.

Depending on the amount of updates, you might hit a limit when replicating to more than 6-8 
servers. I think that if you need 10-20 replicas, then the architecture and design of your 
directory service is less than optimal.

You can increase overall performance in another way with OL by doing subtree synchronization with 
syncrepl. Synchronize portions of the DIT with dedicated servers, e.g. accounts branch to the mail 
server and to the web portal, etc. Configure those high-traffic services to use their local copy of 
the data.

BR,
--
mike