Re: [PATCH 00/09] cifs: local caching support using FS-Cache

[Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>]

On 07/14/2010 08:09 PM, Steve French wrote:
> On Wed, Jul 14, 2010 at 12:41 PM, Scott Lovenberg
> <scott.lovenberg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> On 7/5/2010 8:41 AM, Suresh Jayaraman wrote:
>>>
>>> This patchset is a second try at adding persistent, local caching facility
>>> for
>>> CIFS using the FS-Cache interface.
>>>
>>>
>>
>> Just wondering, have you bench marked this at all? �I'd be interested to see
>> how this compares (performance and scaling) to an oplock-centric design.
>>

Yes, I have done a few performance benchmarks with the cifs client (and
not SMB2) and I'll post them early nextweek when I'm back (as I'm
travelling now).

However, I have never done scalability tests (not sure whether there is
a way to simulate a number of cifs clients).

>> I'd hazard a guess that with pipelining support in SMB2 the performance will
>> be even better since you can have a hot cache and more requests in flight.
> 
> Yes - very plausibly
> 

I have not tried the new SMB2 client. But, it seems the pipelining
support, Oplocks (only Level II kind) could help improve performance.


Thanks,

-- 
Suresh Jayaraman