lkml.org 
[lkml]   [2010]   [Feb]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: NFSv4
From
Date
On Fri, 2010-02-19 at 01:23 +0100, J.A. Magallón wrote: 
> Hi all...
>
> First of all, kudos for new nfs-utils. Now, nfs4 works automagically and
> like a charm.
>
> And now the hard part, some questions:
>
> - I have read that nfs4 includes in the server the locking protocol, no
> need for separate lockd. But in my servers, it seems it is still running:
>
> root 2198 2 0 Feb18 ? 00:00:00 [nfsiod]
> root 23501 2 0 01:01 ? 00:00:00 [nfsd4]
> root 23502 2 0 01:01 ? 00:00:00 [nfsd]
> root 23503 2 0 01:01 ? 00:00:00 [nfsd]
> root 23504 2 0 01:01 ? 00:00:00 [nfsd]
> root 23505 2 0 01:01 ? 00:00:00 [nfsd]
> root 23506 2 0 01:01 ? 00:00:00 [nfsd]
> root 23507 2 0 01:01 ? 00:00:00 [nfsd]
> root 23508 2 0 01:01 ? 00:00:00 [nfsd]
> root 23509 2 0 01:01 ? 00:00:00 [nfsd]
> root 23500 2 0 01:01 ? 00:00:00 [lockd]
>
> Is there any problem with it ? I suppose (correct me if I'm wrong)
> that this kernel lockd will only serve for v2 or v3 mounts,
> that locking for client nfs4 mounts will go through nfsd4.
> Is that right ?

No. The client NFSv4 traffic goes through the ordinary 'nfsd' daemons.
There is no special locking manager for NFSv4, since POSIX locks are
part of the ordinary protocol.

I don't think that the NFS server will switch off lockd even if you do
specify that you only want to serve NFSv4.

> - Why is there only 1 instance of v4 daemon ?

The 'nfsd4' thread above is actually a workqueue that is used for
garbage-cleaning expired NFSv4 state. It isn't a server thread.

> - Is there any page describing the advantages of v4 ? I will have to
> convince the department admin to activate v4 in his solaris boxen...;)

One place to start is the NFSv4 design considerations. See
http://tools.ietf.org/html/rfc2624

Cheers
Trond

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2010-02-19 20:21    [W:0.512 / U:0.464 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site