[pnfs] Linux pNFS road map

[peter honeyman]

marc,

the client may elect to send I/O requests to the MDS for reasons other  
than failure, e.g., small requests.

	peter

On Dec 12, 2007, at 10:35 AM, Marc Eshel wrote:

> pnfs-bounces at linux-nfs.org wrote on 12/11/2007 11:23:39 PM:
>
>> It does not use a cluster FS.
>>
>> The file system on the MDS and the DSs can be any physical fs.  E.g.,
>> for our testing we've been using either ext2 or ext3 (or mixed) on  
>> the
>> MDS and DSs.  It does not currently perform i/o through the MDS,  
>> though
>> it would probably work to do as Bruce suggested and have the MDS  
>> act as
>> a client of itself.
>
> I am not sure what that means. For the MDS to do i/o it needs to
> communicate with the corresponding DS for that i/o and if the client
> failed in doing the i/o through the DS I don't see that the MDS will a
> better chance.
> Marc.