28 November 07 - 01:58OpenDS into the center of the Sun?

Neil Wilson, until recently of Sun's Directory Team, has resigned from the OpenDS team. His open letter to the project and to Sun itself is on his new blog. Symas will be sad to see him go ... especially if he exits the directory space. (more)

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08 November 07 - 00:05AD/ADAM Benchmarking - Notes from the Back Room

I woke up to a long and informative email about how we're doing on the OpenLDAP versus AD/ADAM benchmarking in Symas's vast benchmarking telephone booth. After I read it, I decided others might find it interesting. Howard agreed so almost all of the text follows:

Finally getting some repeatable results worth talking about...

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02 November 07 - 01:01Active Directory (AD/ADAM) Performance

As promised in the white paper, Symas's benchmarking team has been diligently benchmarking OpenLDAP (the new 2.4.6 release that just came out of beta ... plus a little pixie dust from HEAD that will be in 2.4.7) against both Active Directory (AD) and Active Directory Application Mode (ADAM) directory technologies from Microsoft. That means Howard hasn't been doing much else for a few days. This is being done on an AMD Celestica A8440 with four Opteron 875s (dual 2.2GHz cores) and 16GB DDR333 RAM. (By the way, big thanks to our friends in AMD's Open Source Support team who arranged to make this machine available for these tests!) Punchline: at 5,000,000 (5M) entries, OpenLDAP 2.4.6+ delivered a squinch over 25,667 authentications a second and ADAM delivered a slightly smaller squinch over 2,359. We make that 10x better in "marketing simplification" terms. We're firing up an AD run at that size but figure it'll take over 24 hours for the database to load (We guessed wrong, it took just under 24 hours... OpenLDAP took just about 29 minutes and 15 seconds). See why below. The 1,000,000 (1M) entry runs were more on the order of five to one ... details follow. Update coming when AD load completes.

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02 November 07 - 00:23eDirectory load "sledgehammer"

We found a Cool Solutions post about ldif2dib, a new "high performance" database load tool. The improvement is striking ... their offline, super-tuned "sledghammer" reached 687 object-loads a second. Now, we don't know what the hardware was and how the software platform plays out but a recent load of 1M entries (the same sized directory) using ldapadd (the on-line command-line tool not an off-line highly optimized tool) OpenLDAP did the adds at about 857 object-loads a second. The number for their ldapadd was about 22 a second ... 'nuff said?

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