Monthly Archives: April 2008

timezones and when you get mail

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It’s very weird having mail arrive at different times… e.g. when in the US, it’s less likely for some peolpe to mail you in the middle of the night US time.

Back home… common to get response between local time 2-5am… which is rather not 2-5am their local time.

But my habit of pulling mail in the morning after having done so late at night…. hard to break.

mysql-5.1.24-stew1 (with Maria and PBXT)

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I’ve hacked around a bit to get PBXT to compile in tree, and pulled in the Maria engine. Both are latest source.

So, want to try out Maria?

Want to try out PBXT?

Just want to do ./configure and go with it, just like building a normal MySQL Server?

Grab the -stew tree. Source tarball here:

mysql-5.1.24-stew1.tar.gz

(it’s based on something close to 5.1.24… and I’m going to switch some of my systems over to it rather soon… already done some good benchmarks on one of my apps).

feedback much appreciated.

UPDATE: Got x86-64 Linux. Try my binary tarball (built from above src tarball). Built on Ubuntu Gutsy (my laptop). So it may (or may not) work. If it kills your squirrel, not my fault.

OpenLDAP, MySQL Cluster, world of awesome

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Last night (okay… i’m posting thsi a bit later… so the other night), a group of us gathered around to hear about some work that had been done in getting a MySQL Cluster backend for OpenLDAP.

I’d heard a bit of rumors (where rumors is defined by somebody saying something on IRC and me being busy looking at other things) about this previously, but last night was the first time I a) saw it working and b) saw performance numbers.

Disclaimer: I am no LDAP expert.

So, what is it?

Normal LDAP can replicate asynchronously from one machine to another. You can even update on both and it has some conflict resolution. But… this costs in performance.

Normal LDAP can also replicate (asynchronously) to a remote location for read-only (e.g. make authentication go faster in Australia with the main LDAP server in the US).

The MySQL Cluster backend for OpenLDAP connects directly to MySQL Cluster, using rather optimised schema, indexes and coding (directly using everything that we’re good at – which was really awesome to hear).

So, the MySQL Cluster backed LDAP server is the 2nd fastest in the world. The fastest is OpenLDAP on a single machine. With MySQL Cluster, we’re not that much slower than a single box – but we have redundancy. So that’s totally awesome. The third fastest…. much slower than us.

This was one of the most awesome new things I’ve seen here.