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They're typically desktop or lab machines for academics, students, etc. Hardware-wise they're Dell desktop boxes of a few years old - a 2.4GHz processor with 512MB of memory is typical. Something I should have mentioned is that they're running Fedora Core 5, with a few running FC6.
Any chance of moving to one central Directory server on proper hardware, with proper resources?
btw, are the desktops replicas of a central master?
Yes, the model is essentially one of a central write-master with all clients being replicas (using our own replication technology). We do want to think about moving away from this, however, possibly using local proxy-caching with a handful of servers replicating from the master with syncrepl. It's all still to be investigated properly, but there's certainly an incentive for that.
I hope you mean 5, as there are only 5 listed on the Oracle site.
As Quanah said, there are 6.
I still only see 5 at:
http://www.oracle.com/technology/products/berkeley-db/db/update/4.2.52/patch...
Sorry, I meant to include the link in the last message about this. We get these patches from Quanah's stanford page...
http://www.stanford.edu/services/directory/openldap/configuration/bdb-build-...
Cheers Toby