[OpenAFS] Performance issue with "many" volumes in a single /vicep?

Steve Simmons scs@umich.edu
Wed, 24 Mar 2010 16:44:20 -0400

On Mar 24, 2010, at 4:38 PM, Russ Allbery wrote:

> Steve Simmons <scs@umich.edu> writes:
>> Our estimate too. But before drilling down, it seemed worth checking =
>> anyone else has a similar server - ext3 with 14,000 or more volumes =
in a
>> single vice partition - and has seen a difference. Note, tho, that =
>> not #inodes or total disk usage in the partition. The servers that
>> exhibited the problem had a large number of mostly empty volumes.
> That's a *lot* of volumes from our perspective.  The biggest partition
> we've got has about 7000 volumes on it.  It must be really fun when =
> have to restart that file server and reattach volumes.

Nightmare is a better word. Fortunately very recent 1.4 releases have =
gotten a lot faster on that front. It's also another reason why we're =
desperately trying to carve out time so we can test dynamic attach, but =
that's grist for another thread.