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Re: Index Add Failures

--On Thursday, November 01, 2012 12:36 PM -0400 Kyle Smith <alacer.cogitatus@gmail.com> wrote:

Ok, I have been running 2.4.32 for some time with no issues. Yesterday, 2
different servers (both part of a 4-way MMR) produced an "index add
failure" and an "index delete failure". I went back over the bdb
DB_CONFIG Settings (listed below) and everything looks nominal to me.
Would it just make more sense to switch from bdb to mdb instead of
troubleshooting these "random" errors too much? I also noticed that the
number of "deadlocks" corresponds to the number of errors that were
produced. Is there correlation there?

I would suggest back-mdb in OpenLDAP 2.4.33 over back-hdb, yes. It will remove these deadlock issues entirely. When you configure the back-mdb backend in cn=config, be sure to have:

olcDbEnvFlags: writemap
olcDbEnvFlags: nometasync

set as well. This makes back-mdb writes significantly faster than writes to back-bdb/hdb. (Some 2x faster in my testing so far).



Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
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