Home Directory DB to RAM disk

Hello

I use 5.2 Patch 6 and one of my person SAM has send me suggestions of AM Tune, and a point that he must change the value of 'nsslapd-db-home-directory' to point to the temp directory.

I'm really confused and a little hesitant to put everything to the tmp directory. I understand that this will improve performance, but once again all put in the temp directory.

Could someone provide my all know about this?

-John

Hi John,.
You have nothing to do, the DS server will try to rebuild its cache in itself, but performance may be sub-optimal, until the cache gets properly completed/completed (due to the initial file system access), but once most of the Hare that happens in the cache, you should have significant performance boost.

Or alternatively before putting into production the directory server, you might 'first' the cache to have a "hot-start". There are 2 approaches that you may have in this case:

1) after that the directory server has been / gracefully closed / and front/reboot /, you could save/copy the contents of this cache (files __db.*) on a disk and restore it to the location once restarted.
(2) to implement a job/script "priming" (specific research, or with the help of SLAMD) to begin this cache once the server has been rebooted and just before putting it into production.

The first is easy to achieve using the script, but is not guarantee cover the case of a sudden stop of the server (for example: loss, accident, hanging, etc.). The latter is less trivial and may require a LDAP, sizing of the cache traffic analysis work, etc...

HTH,
Marco

Tags: Fusion Middleware

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