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Linux DirectIO



 
 
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  #1  
Old July 24th 07, 02:31 AM posted to comp.arch.storage
Faeandar
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Posts: 191
Default Linux DirectIO

Does anyone know if there is a mount option for Linux clients that
will bypassing NFS caching and force direct IO?

Thanks.

~F
  #2  
Old July 28th 07, 04:34 PM posted to comp.arch.storage
Jan-Frode Myklebust[_2_]
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Posts: 9
Default Linux DirectIO

On 2007-07-24, Faeandar wrote:
Does anyone know if there is a mount option for Linux clients that
will bypassing NFS caching and force direct IO?


"man 5 nfs"

noac Disable all forms of attribute caching entirely.
This extracts a significant performance penalty but it
allows two different NFS clients to get reasonable
results when both clients are actively writing to a
common export on the server.

noac Disable attribute caching, and force synchronous writes.
This extracts a server performance penalty but it allows
two different NFS clients to get reasonable good results
when both clients are actively writing to common filesystem
on the server.

The second description is for v4, but maybe "force synchronous writes" still
applies to both.


Not sure if this is exactly what you're looking for... but it's the closest
I'm aware of.


-jf
 




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