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Re: BDB vs. HDB

--On Thursday, March 03, 2005 9:51 AM -0800 Donn Cave <donn@u.washington.edu> wrote:

On Thursday, March 3, 2005, at 09:01 AM, Matthew J. Smith wrote:
Given a brand new OpenLDAP 2.2.23 installation, is there any reason to
continue to use BDB instead of HDB, or can I safely move everything to
HDB?  Do the Berkley 4.2.52+ db_* tools support HDB?  I recall a
with db_verify once upon a time...

One thing to test would be performance on queries with the search base different from the database suffix. If you see the problem I thought I was seeing, hdb will be an order of magnitude worse in this case. That was with an older version, 2.2.17 I think, and of course the usual caveats with respect to tuning parameters.

HDB relies heavily on the idlcache. If you do not properly configure the system with a large enough idlcache, you will see issues around queries.


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