Re: [LSF/MM TOPIC] [ATTEND] Creation of a readdirplus-like system call

[Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>]

Hello Steven,

On 01/23/2013 10:43 AM, Steven Whitehouse wrote:
> Hi,
>
> As part of the work we've been doing in relation to integration between
> NFS/Samba and GFS2, Abhi has been working on a readdirplus system call
> in order to investigate the issues involved with creating such a call.
> It is still early days yet, but by April there should be some
> interesting results to present.

I think having such a call would be good for other cluster file systems 
as well, e.g. Lustre and FhGFS.

>
> Please add Abhi to the attendee list as well as myself.
>
> Also, it has been some time since we had a NFS/Samba meeting to discuss
> the other issues which are pending, such as locking, ACLs, etc. So we
> could perhaps also allow some time to do that face to face rather than
> over the phone as we've been doing up til now,

Among others, locking is another issue for cluster file systems. For 
example Lustre and FhGFS currently disable cluster wide locks by default 
and add a configuration parameter for cluster wide locks. The reason is 
simply that one mostly only needs local locks and that cluster wide 
locks involve network messages and are therefore rather expensive. Are 
you doing any work into that direction?

I definitely need to create a list, but I think several other system 
calls could be optimized for cluster file systems.


Thanks,
Bernd