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Re: poor performance of OpenLDAP vs AD?
On Thu, 14 Jul 2005, Igor Brezac wrote:
On Wed, 13 Jul 2005, Quanah Gibson-Mount wrote:
Qualitative statements about the general performance of
any set of given Directory Servers can be made if you make everything "the
same" as much as is feasibly possible.
I do not see this being realistic. You have fallen short in this regard
with your Symas benchmarks. Yes, benchmark results can be used as a
general performance indicator, but one should not assume that their ldap
deployment will perform the same. We all have our own requirements,
different machines, schema, data set size, indexes, etc., and more than
likely they are different than what is used in benchmarks.
So? If the benchmark is a responsibly executed test it is reasonable to
presume that faster hardware will perform at least slightly better and
that worse hardware will perform at least slightly worse. Doing these
things responsibly doesn't lead to them being done perfrectly so we are
all free to repeat the test ourselves if they seem wrong or don't fit our
situation well enough. But extrapolating from past experience to future
expectations is part of what IT profressionals do regulalrly. Benchmarks
are but one point of data to use in such extrapolations, but thank
goodness good benchmarks exist to give us some open yard stick to compare
our own results to. However, benchmarks are most often used to choose one
thing over another. If speed is a critical consideration, changing the
other variables may not matter much in the scheme of things.
If you have a beef with the Symas benchmarks consider publishing some of
your own with an explanation of why they're better. Maybe you have some
substantive beef with their benchmarks, but it is not apparent to me from
what you've said here.
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)