Information needed(NFS)

Information needed(NFS)

[Rashmi Agrawal]

Hi All,

I wanted NFS support for linux. I know there is a built in support for
linux kernel now. But I just wanted to know if we have other
implementation
of NFSv3 over linux.

The current NFS is nfsv3 for kernel 2.4.18. Also nfsv4 work is going on
and is
available as patches by citigroup. But do we have any nfsv4
implementation
which has matured to use for my needs where in I might like to have
replication/
migration, high availibility etc.

Any kind of inputs will be helpful. Please copy your response to my
mailid as I am
not a part of the mailing list.

Regards
Rashmi

Re: Information needed(NFS)

[Trond Myklebust]

>>>>> " " == Rashmi Agrawal <rashmi.agrawal@wipro.com> writes:

     > Hi All, I wanted NFS support for linux. I know there is a built
     > in support for linux kernel now. But I just wanted to know if
     > we have other implementation of NFSv3 over linux.

What do you mean? The client or the server? For the server the answer
is "no" AFAIK, but for the clients you could always try to use
something like WebNFS and Java if you like.

     > The current NFS is nfsv3 for kernel 2.4.18. Also nfsv4 work is
     > going on and is available as patches by citigroup. But do we
     > have any nfsv4 implementation which has matured to use for my
     > needs where in I might like to have replication/ migration,
     > high availibility etc.

NFSv4 is still work in progress.

Cheers,
  Trond

Re: Information needed(NFS)

[Rashmi Agrawal]

Hi Trond,
Thanks  for the quick response.

>      > do we have any nfsv4 implementation which has matured to use for
> my
>      > needs where in I might like to have replication/ migration,
>      > high availibility etc.
>
> NFSv4 is still work in progress.

When you talk about NFSv4 implementation in progress, is it from
citigroup in MIchigan as I would like
to know the implemented features if it is something else.

I have another scenario wherein I have 4 node cluster and nfsv3 in all of
them.

First scenario:
1. Server running in one of the 2 nodes connected to shared storage and 2
other nodes are acting as clients.
2. If nfs server node crashes, I need to failover to another node wherein
I need to have access to the lock state of the previous
server which might not be in shared disk. Also,I need to tell the clients
that the IP address of the nfs server node has changed.
IS IT POSSIBLE or what can be done to implement it?

Another scenario is..
1. When one of the client crashes, it has to failover to another client,
in that case if client crashed with some locks held how the
newly come up client going to grab the lock again when it is not
released? Again the server might already be taking care
of it but I am not sure about it.

I hope I can use NFS for this kind of set up and if not what will it take
to have this kind of set up using NFS?

I have also posted this query in linux-kernel and I am sorry for the
inconvinience if you get it twice. Please   do copy
to me while replying.

Regards
Rashmi
Trond Myklebust wrote:

>  Cheers,

>   Trond

Re: Information needed(NFS)

[Trond Myklebust]

>>>>> " " == Rashmi Agrawal <rashmi.agrawal@wipro.com> writes:

     > When you talk about NFSv4 implementation in progress, is it
     > from citigroup in MIchigan as I would like to know the
     > implemented features if it is something else.

It is based on their implementation, but with value-added cleanups.

     > I have another scenario wherein I have 4 node cluster and nfsv3
     > in all of them.

There are several vendors that are producing NFS failover solutions
for Linux. I suggest that you Google around a bit and check out what's
on offer.

Cheers,
  Trond

Re: Information needed(NFS)

[Andrew Sharp]

On Mon, Nov 18, 2002 at 04:13:13PM +0100, Trond Myklebust wrote:
> >>>>> " " == Rashmi Agrawal <rashmi.agrawal@wipro.com> writes:
> 
>      > Hi All, I wanted NFS support for linux. I know there is a built
>      > in support for linux kernel now. But I just wanted to know if
>      > we have other implementation of NFSv3 over linux.
> 
> What do you mean? The client or the server? For the server the answer
> is "no" AFAIK, but for the clients you could always try to use
> something like WebNFS and Java if you like.

I've heard rumblings that the kernel support for v3 exists but is not
"complete."  Is that misinformation?  Can anyone expound?  I've run tests
with a client in v3, but I didn't snoop the traffic so I can't swear ...

a