[OpenAFS] strange disk write activity compared to network bandwidth
Jeffrey Altman
jaltman@secure-endpoints.com
Mon, 27 Aug 2007 11:33:27 -0400
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Sophana wrote:
> Hi
>
> I'm evaluating openafs 1.4.4 performance on centos 4
> I noticed some strange things.
>
> I'm doing a simple svn checkout (meaning write to afs) (server on the
> lan) of a lot of source files (quite small...) (about 50mbyte+svn
> overhead ~= 100mbyte)
> When using gkrellm, I can see the disk write bandwidth at at a high
> level (> 15mbyte/s), almost no read, and the network bandwidth is MUCH
> lower (less than 1mbyte/s). It seem that the server is busy making a LOT
> of disk writes, that are about 10 to 20 times the volume of the real
> data being written.
This is only a guess but for every change to a directory the new
directory contents will be written to disk. This is in addition to the
data belonging to the files.
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