Re: scaling...

["Kurt D. Zeilenga" <Kurt@OpenLDAP.org>]

At 02:19 PM 8/18/99 +0200, Carl Moberg wrote:
> I'm trying to build a large tree for servicing
> my sendmail servers with external to internal
> address translation. I'm experiencing some
> (seemingly :) size-related problems. The database
> will contain 1.1M entries to start with, and will
> grow from there.

The FAQ has a number of suggestions for improving
performance.  If you have other questions concerning
OpenLDAP software use, please ask on our software
list.

> Is there anyone running a service of this size and
> willing to share experience on a couple of things
> like;
>
> 1. Building the 1.1M DN tree takes between
>    6-8 hrs. This is on a 266P2 w 512M, using
>    dbcachesize of 10000000. Any hints on how
>    to speed this up ?

Build the index on a ram disk and than move onto
disk before spinning up slapd.

> 2. The response times for queries right
>    now is about 1 sec, I would like to
>    go to 0.1 sec (from localhost). Any
>    hints on indexing strategies ?

Sounds like the required indices either do not
exist, cannot be held in the dbcache, or your searches
require lots of index merging.

I would not be able to give specific advise without
additional details.  I suggest posting a message with
additional details concerning your configuration (both
server and clients (sendmail)) to OpenLDAP-software
list.

Kurt