[OpenAFS] write caching differences between 1.2 and 1.4 clients?

[Derrick J Brashear]

Per our private thread, the salient point is "on linux" and not simply 
1.2 versus 1.4

On Tue, 14 Aug 2007, Stephan.Wiesand@desy.de wrote:

> The AFS client used to cache writes on the local disk until a file is closed, 
> but this seems to have changed?
>
> Consider the following script:
>
> #!/bin/sh
> while [ 1 = 1 ]; do
>    date
>    sleep 10
> done
>
> Now I run "script.sh >> afs12.out" on a 1.2.13 client, and "script.sh >> 
> afs14.out" on a 1.4.4 one. Except for the AFS client version, the systems are 
> identical (Scientific Linux 3, same kernel & patches, ...).
>
> On any 3rd client system (version doesn't matter), I see afs14.out growing by 
> 30 bytes every 10 seconds, while afs12.out stays at size 0 until I kill the 
> script.
>
> Is this change intentional? I always thought the old behaviour really helps 
> in environments with many clients? Any insights much appreciated.
>
> Thanks,
> 	Stephan
>
> -- 
> Stephan Wiesand
>  DESY - DV -
>  Platanenallee 6
>  15738 Zeuthen, Germany
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