[OpenAFS] Re: bonnie++ on OpenAFS

Andrew Deason adeason@sinenomine.net
Mon, 22 Nov 2010 13:11:21 -0500

On Mon, 22 Nov 2010 18:00:41 +0100
Achim Gsell <achim.gsell@psi.ch> wrote:

> Hi,
> bonnie++ on OpenAFS with sizes above 8192 behaves strange on my Linux
> systems: after writing up to 5-7 files with 1GB each, write
> performance drops from 50-60 MB/s to around 3MB/s.

Is this writing to several files sequentially? Or do you mean bonnie++
writes has about 5-7 files open at the same time, and has written about
1G into each? If the latter (or regardless), I'd try increasing the size
of the cache; since you're seeing traffic across the network, I'd
suspect you're thrashing. If you feel like sharing a network dump of the
traffic when the problem occurs (probably not to the list), we could
tell you what it all is.

Andrew Deason