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Re: Performance Comparisons
I would say to your client that it is better to mock-up a proof of
concept and test it for yourself.
I too was in this boat because I had heard all of the stories about how
unreliable openldap was and how it couldn't be trusted so I went looking
for reviews and information and found a couple of web sites like this
one: http://www.nwfusion.com/reviews/2000/0515rev2.html which basically
says that openldap doesn't compete, but I didn't buy it because the
tests where obviously performed by a bunch of NT pukes that couldn't
integrate anything that didn't have a checkbox or a drop down menu.
So I went further and installed it myself and found that I was getting
horrible performance. So I did some reading and tuning and got the
server to perform quite well. Here is a post on the pam_ldap list that
explains my findings:
In the end I now have openldap storing mail routing for sendmail. So
each email causes 3 queries, 1 to find the look up the mail routing, 1
to make sure that the email address exists before excepting, and 1 to
resolve the local user mailbox. Even with 3 queries on each mail
request I was still able to break 1.3Mill emails a day while
benchmarking and tuning. Further analysis indicates that the bottle
neck is the disk speed to write the email.
I should also mention that the server isn't anything special just a
1.2ghz pentium3 with 3 10k rpm scsi disks in a raid 5 array.
The point you ask? Don't depend on reviews, test for yourself.
Tod Thomas wrote:
I imagine this question has been asked here before but I wanted to try
and get the latest information available if I could.
Is there a recent, respected article, or documentation that provides an
empirical comparison of available LDAP server offerings ? I ask this
because in a recent vendor meeting OpenLDAP's scalability and
performance was called into question. They expressed reluctance in
recommending it as a viable production quality enterprise wide solution
and opted instead for a more mainstream commercial offering. This
struck me as I hadn't heard any complaints or problem reports that would
substantiate that opinion.
Please email me directly as I've been having problems receiving list
emails as of late.
Thanks - Tod.