Re: New SASLdb mechanism MDB

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Patrick Ben Koetter wrote:
* Howard Chu<hyc@xxxxxxxxxxxxxxx>:
Attached is a proof-of-concept implementation of a sasldb plugin
using the new memory-mapped database library (MDB) we've developed
in the OpenLDAP Project. It is probably not suitable for production
use, just posting it now to get early feedback.

Impressive read performance!

;) It is blindingly fast for reads...

Do you anticipate any special benefits regarding MDB usage for sasldb?

Not really, I'm not aware of sasldb being a performance bottleneck in general. (But admittedly, I haven't profiled or benchmarked sasldb.) My main motivation is to provide a replacement for BerkeleyDB in software that OpenLDAP depends on, to make it possible to avoid Oracle licensing ambiguities going forward.

However, the MDB code has the distinct advantage of being much smaller and simpler than the alternative, which is always good from a maintainability standpoint. The fact that the core code is small enough to fit into a CPU's L1 instruction cache, runs faster, and uses less memory, is just icing on the cake.

  -- Howard Chu
  CTO, Symas Corp. 
  Director, Highland Sun
  Chief Architect, OpenLDAP

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