[Sheepdog] [PATCH v6 7/8] collie: read the cached objects if any for collie operation

[Liu Yuan]

On 03/31/2012 02:29 PM, MORITA Kazutaka wrote:

>> But we simply can't do it, since collie will issue RW requets without
>> > the knowledge if we have cache enabled or not.
> I don't still understand why we can't process collie requests with the
> above way.  Can you give me an example for it?
> 


I assume who use collie doesn't know whether the Guest use object cache
or not.

If the Guest use the cache, but collie issue a read request without
SD_FLAG_CMD_CACHE flag, then this operation will cause the object cache
to be removed.

Yes, we can add one more option to collie to specify whether we have
cache or not and leave the policy of the cache to be made by users.

Thanks,
Yuan