Mailing List Archive

You don't say whether you have multiple client systems mounting the share,
or just a single client with multiple processes contending for locks.

In the latter situation and depending on your client o/s, you may be able to
dispense with the lock manager altogether and use local kernel locks
instead,
using the "llock" option to the NFS mount command.

rgds,

D
#

----- Original Message -----
From: "Edward Hibbert" <EH@dataconnection.com>
To: <toasters@mathworks.com>
Sent: Thursday, December 12, 2002 10:13 PM
Subject: NFS Lock Performance


> I'm hitting a filer very hard with NFS lock/unlock calls. Although the
> ops/second is still comfortably below what I've seen it do before (with
more
> read/write ops), I'm seeing it occasionally take many seconds to return
from
> a non-blocking lock attempt, or from an unlock call.
>
> I theorise based purely on ignorance that I might be soaking the lock
> manager. Is there any tuning I can do (e.g. add more threads)?
>
> Regards,
>
> Edward Hibbert.


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No, I have multiple client systems, so I do need the locks to go to the
NetApp.

Edward.

-----Original Message-----
From: Duncan Greenwood [mailto:duncan.greenwood@btinternet.com]
Sent: 12 December 2002 22:56
To: Edward Hibbert; toasters@mathworks.com
Subject: Re: NFS Lock Performance


You don't say whether you have multiple client systems mounting the share,
or just a single client with multiple processes contending for locks.

In the latter situation and depending on your client o/s, you may be able to
dispense with the lock manager altogether and use local kernel locks
instead,
using the "llock" option to the NFS mount command.

rgds,

D
#

----- Original Message -----
From: "Edward Hibbert" <EH@dataconnection.com>
To: <toasters@mathworks.com>
Sent: Thursday, December 12, 2002 10:13 PM
Subject: NFS Lock Performance


> I'm hitting a filer very hard with NFS lock/unlock calls. Although the
> ops/second is still comfortably below what I've seen it do before (with
more
> read/write ops), I'm seeing it occasionally take many seconds to return
from
> a non-blocking lock attempt, or from an unlock call.
>
> I theorise based purely on ignorance that I might be soaking the lock
> manager. Is there any tuning I can do (e.g. add more threads)?
>
> Regards,
>
> Edward Hibbert.


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.419 / Virus Database: 235 - Release Date: 13/11/2002