[OpenAFS] Tuning openafs write speed
Thu, 23 Aug 2007 10:35:36 -0400
> memcache is much faster than the disk cache. memcache will not get
> better if no one ever uses it so the openafs developers can get some
> bug reports. i think memcache has improved quite a bit (but it could
> be better, i need to submit some patches) over the last couple years.
> i use '-memcache -chunksize 15 -dcache 1024'. if your system is
> starved this might be an issue.
I did a whole bunch of testing regarding cache performances while
we've been moving all of our users off of AFS-hosted mailspools, and
here's what I've found -- this is on Sol 10 x86...
* slowest: disk cache, of course.
* medium: memory cache
* fastest: ufs filesystem on a lofi-mounted "block device" hosted in /
tmp (which is in-RAM)
(I know this certainly wastes some cpu/memory resources and
overhead, but... it works)