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Re: [grouper-dev] Performance of Group Searches

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  • From: "Michael R. Gettes" <>
  • To: Grouper Dev <>
  • Subject: Re: [grouper-dev] Performance of Group Searches
  • Date: Fri, 19 Oct 2007 09:31:10 -0400

FWIW - this is what most LDAP servers do. As we continue down these performance
paths - I think we can learn a lot from the techniques of LDAP servers (fairly
well documented by both Sun and OpenLDAP) and apply them to Grouper. Space/time
trade-offs are a big issue for LDAP and as long as the right control knobs are
there for caching (and negating the cache when modifications happen for appropriate
operations) then caching as much as possible is the right way to go.

Nice work Shilen!


On Oct 19, 2007, at 9:22, Shilen Patel wrote:

I wonder whether the privilege checks should be done on the final resultset after all the search filters have been resolved. Each search filter may return a lot of results, but ANDed searches may cause many to be discarded.

That's a great suggestion given how expensive the privilege checks are. I'll look into that.

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