Re: Openldap2.4.16 performance issue

[William E Jojo <w.jojo@hvcc.edu>]

----- Original Message -----
> From: "Dan White" <dwhite@olp.net>
> To: "William E Jojo" <w.jojo@hvcc.edu>
> Cc: "Dieter Kluenter" <dieter@dkluenter.de>, openldap-technical@openldap.org
> Sent: Monday, August 23, 2010 2:29:25 PM
> Subject: Re: Openldap2.4.16 performance issue

> On 23/08/10 14:13 -0400, William E Jojo wrote:
> >Hi Dieter,
> >
> >Could you kindly explain what this means? I've been all over the
> >inter-webs and I'm not finding anything concrete about OpenLDAP and
> >VM's or Databases and VM's in general. The closest I came was about
> >some database latency studies and some VMware propaganda.
> >
> >We are about to launch a master and two replicas (utilizing
> >delta-syncrepl) running in Ubuntu 10.04 on a VMware VSphere ESXi 4.0
> >cluster with four IBM x3650-M2's (2 Quad Nahalem and 64GB memory
> >each) with virtual disks carved from NFS mounts to all of the VSphere
> >servers in the cluster to facilitate HA and FT - by the VMware book.
> 
> I think NFS is a red flag here. To what extent to you use NFS in your
> setup? Do you store any berkeley files on an NFS mount?


Nicely spotted, but no. :-) The are no databases on an NFS mount. The NFS buck stops at VMware. The Datastore is an NFS mount and the virtual disks are carved by VMware from this storage. The guest VM never sees anything but the virtualized hardware.

Thank you for you input, it is much appreciated!

Bill


> 
> If so, you should carefully research the mixing of the two. The
> Berkeley
> documentation discusses it:
> 
> http://tinyurl.com/28ehu3s
> 
> -- Dan White