Re: Open LDAP Load Handling

["Prashant K.S" <ksprashant@yahoo.com>]

Thanks for Responding.Basically my setup consists of a
Linux 6.1 machine running openldap 1.2.7-2. Of course
my hardware is good with a RAM of 1GB. 

Regards
Prashanth


--- Terry Lambert <terry@whistle.com> wrote: >
Prashant K.S wrote:
> >     I am using openldap for authentication of the
> > users on a mail server. Actually our setup
> consists of
> > 4 mail servers. The total number of users using
> our
> > system are around 1 million. Now basically some
> times
> > due to the heavy load slapd dies or goes in a
> defunct
> > state.Is OpenLdap not capable of handling loads of
> > some 5000-10000 hits/sec. If Yes please tell me if
> any
> > configuration needs to be changed.
> 
> You don't say anything about your OS or setup.
> 
> If you are running on DOS on an 8 MHz PC-AT using
> KA9Q
> over your local ametuer radio repeater for your
> network
> connectivity, I rather suspect your load is too high
> for
> your hardware...
> 
> The failures you are seeing should not be occurring,
> but
> with absolutely no context, we'll have a hard time
> with
> providing any useful advice.
> 
> Normally, LDAP load balancing is done by setting up
> a
> number of slaves and a stealth master.  Like DNS,
> this
> permits the master to handle only writes (by way of
> a
> referral to the client from the slaves), and clients
> all run against the slaves, as the published site
> LDAP
> servers (e.g. publication via DNS SRV records). 
> This
> lets you throw more hardware at the load problem,
> until
> you reach the write-load-limit.
> 
> Since most traffic is supposed to be read traffic,
> or
> you are supposed to be using different technology,
> this
> generally works very well (how often does your name
> or
> phone number or password change?).
> 
> 
> If you wanted to give us more information about your
> exact setup, and what you mean by "dies" and
> "defunct
> state", we could probably help you out with your
> basic
> problem, which is probably not related to load,
> unless
> you are using kernel threads on Solaris or Linux,
> and
> just have a lot of clients, and so are running out
> of
> system resources, in which case: don't.
> 
> 
> -- Terry Lambert
> -- Whistle Communications, Inc., an I.B.M. Company
> -- terry@whistle.com
>
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