Hi Quanah,

I've transferred one of the nodes to back-hdb and the performance appears to broadly match back-bdb.

Is there a simple test I can perform to confirm that it is indeed using back-hdb?

For completeness here's the result of my timed search:

bash-4.1$ time ldapsearch -H ldaps://rowan.authorise.is.ed.ac.uk:636 -b 'ou=staff,ou=law,ou=hss,dc=authorise,dc=ed,dc=ac,dc=uk' -a always "(&(eduniSchoolCode=S26)(eduniCategory=101)(eduniIDStatus=300))"

# numResponses: 425 # numEntries: 424

real 0m0.902s user 0m0.054s sys 0m0.025s

On 08/08/13 16:45, Quanah Gibson-Mount wrote:

--On August 8, 2013 4:34:32 PM +0100 Mark Cairney Mark.Cairney@ed.ac.uk wrote:

...

...

back-bdb or back-hdb? "BDB" is just the storage database for those two backends.

back-bdb.

Thanks. I would note that back-mdb is based on back-hdb, and that can have significant differences in performance profile for some operations as compared to back-bdb. If it were possible, I'd be curious to know if you see the same issue with back-hdb as you do with back-mdb.

--Quanah