Hi,
I could see that it is mentioned that
/var/lib/nfs/v4recovery needs to be created
for NFSv4 at=20
=20
http://www.citi.umich.edu/projects/nfsv4/linux/using-nfsv4.html.
1. What is this file for ?
As NFSv4 uses lease based locking , it does
create files on persistent storage.
And its state could be stored =20
in /var/lib/nfs/statd/state , right ?
2. I have read that lease time for NFSV4 can be=20
chnaged by setting value in
/proc/fs/nfsd/nfsv4leasetime. In case i dont
set lease period , is grace period set by user
considered as the lease time ?
Thanks,
kiran
=20
=20
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Hi,
I could see that it is mentioned that
/var/lib/nfs/v4recovery needs to be created
for NFSv4 at=20
=20
http://www.citi.umich.edu/projects/nfsv4/linux/using-nfsv4.html.
1. What is this file for ?
As NFSv4 uses lease based locking , it does
"NOT"
create files on persistent storage.
And its state could be stored =20
in /var/lib/nfs/statd/state , right ?
2. I have read that lease time for NFSV4 can be=20
chnaged by setting value in
/proc/fs/nfsd/nfsv4leasetime. In case i dont
set lease period , is grace period set by user
considered as the lease time ?
Thanks,
kiran
--- mehta kiran <[email protected]> wrote:
> Hi,
> I could see that it is mentioned that
> /var/lib/nfs/v4recovery needs to be created
> for NFSv4 at=20
> =20
>
http://www.citi.umich.edu/projects/nfsv4/linux/using-nfsv4.html.
> 1. What is this file for ?
> As NFSv4 uses lease based locking , it does
> create files on persistent storage.
> And its state could be stored =20
> in /var/lib/nfs/statd/state , right ?
>=20
> 2. I have read that lease time for NFSV4 can be=20
> chnaged by setting value in
> /proc/fs/nfsd/nfsv4leasetime. In case i dont
> set lease period , is grace period set by
> user
> considered as the lease time ?
>=20
> Thanks,
> kiran
> =20
>=20
> =20
>=20
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam
> protection around=20
> http://mail.yahoo.com=20
>=20
>=20
>
-------------------------------------------------------
> This SF.Net email is sponsored by xPML, a
> groundbreaking scripting language
> that extends applications into web and mobile media.
> Attend the live webcast
> and join the prime developer group breaking into
> this new coding territory!
>
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121642
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> https://lists.sourceforge.net/lists/listinfo/nfs
>=20
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On Thu, Mar 09, 2006 at 11:18:03PM -0800, mehta kiran wrote:
> I could see that it is mentioned that
> /var/lib/nfs/v4recovery needs to be created
> for NFSv4 at
>
> http://www.citi.umich.edu/projects/nfsv4/linux/using-nfsv4.html.
We've had some negative feedback on the way we're storing persistant
state for reboot recovery. Among other problems:
- There's an objection (which I don't entirely claim to
understand) against nfsd doing directory operations in the
kernel
- It doesn't give any chance for synchronous callouts for, e.g.,
mirroring the data to a backup server for failover, whereas
the standard statd stuff does.
Hopefully this will fixed by 2.6.17 or 2.6.18.
> 1. What is this file for ?
> As NFSv4 uses lease based locking , it does
> create files on persistent storage.
> And its state could be stored
> in /var/lib/nfs/statd/state , right ?
I don't think we can store the state in exactly the same place, but we
probably will move to something more similar to statd.
> 2. I have read that lease time for NFSV4 can be
> chnaged by setting value in
> /proc/fs/nfsd/nfsv4leasetime. In case i dont
> set lease period , is grace period set by user
> considered as the lease time ?
Since we use leases to implement delegations, there's an ugly conflict
between /proc/sys/fs/lease-break-time and /proc/fs/nfsd/nfsv4leasetime,
which we're currently working on fixing.
--b.
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On Thu, Mar 09, 2006 at 11:44:11PM -0800, mehta kiran wrote:
> Hi,
> I could see that it is mentioned that
> /var/lib/nfs/v4recovery needs to be created
> for NFSv4 at
>
> http://www.citi.umich.edu/projects/nfsv4/linux/using-nfsv4.html.
> 1. What is this file for ?
> As NFSv4 uses lease based locking , it does
> "NOT"
> create files on persistent storage.
It does need some persistent storage--see rfc3530 section 8.6.3.
--b.
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