Is there a "best" way to check to see if OpenLDAP replication is working?
I have one script that checks the ContextCSN of the root of the database, which works to a certain degree. However, even when that matches it seems that sometimes a "deep inspection" (actually traversing the whole database and comparing each entry individually) of the directory shows differences even when the ContextCSN of the directory root matches.
Tim Gustafson tjg(a)soe.ucsc.edu
Baskin School of Engineering 831-459-5354
UC Santa Cruz Baskin Engineering 317B
Thank you both for your quick response. I understand non-indexed reads will
always be slower than indexed, but it was a batch process and I didn't want
to incur the overhead of another write-impacting index. I've recently come
back to OpenLDAP and so wasn't sure whether the new version's backend became
'fragmented' (for lack of a better term) like the old ones (<=2.1.25) seemed
to. I hoped they did not, but I wanted to confirm as I haven't been running
2.4.25 w/BDB 4.8.30 long enough or under enough load yet to tell. I'm glad
to hear 'defraging' is not required in newer versions.
I will begin testing BDB 5.x as a replacement to our current BDB 4.8.30
backend. Is anyone aware of any technical reasons why one should use 5.1.25
On Tue, May 31, 2011 at 5:27 PM, Quanah Gibson-Mount <quanah(a)zimbra.com>wrote:
> --On Tuesday, May 31, 2011 4:49 PM -0500 Mark <mah042(a)gmail.com> wrote:
> Back in the days of OpenLDAP 2.1 with Berkeley DB 220.127.116.11 we used to
>> have to 'reload' out backend database occasionally as non-indexed reads
>> would get slower and slower over time. The 'reload' entailed:
>> • stop slapd
>> • slapcat the contents to an .ldif file
>> • remove the database files
>> • slapadd the .ldif file to create a new, fresh db instance
>> • start slapd
>> Then our performance problems went away. Re-indexing didn't do the trick.
>> Is such occasional re-building of the backend database recommended in
>> OpenLDAP 2.4.25 with Berkeley DB 4.8.30?
> No. You are having this problem by running ancient releases of OpenLDAP
> and BDB. BTW, BDB 5.x (5.1 and 5.0) are also fully supported by OpenLDAP
> 2.4.23 and later.
> Quanah Gibson-Mount
> Sr. Member of Technical Staff
> Zimbra, Inc
> A Division of VMware, Inc.
> Zimbra :: the leader in open source messaging and collaboration