Re: Direct NFS anyone?
From: Mark D Powell <Mark.Powell2_at_hp.com>
Date: Wed, 22 Dec 2010 09:06:05 -0800 (PST)
Message-ID: <b674cbcd-8bad-4b0f-a5e0-88f65b968b86_at_k11g2000vbf.googlegroups.com>
On Dec 21, 3:15 am, "Hank M. Higher" <nom..._at_notformail.com> wrote:
> On 20.12.2010 13:57, Gerard H. Pille wrote:
>
>
>
>
>
> > Noons wrote:
> >> Gerard H. Pille wrote,on my timestamp of 20/12/2010 8:14 PM:
> >>> I was looking around because of some performance problems with Direct
> >>> NFS, but
> >>> it seems nobody has problems with Direct NFS.
>
> >> In what OS platform?
>
> >>> Or is nobody using it?
>
> >> Count 1 here.
>
> > It feels great not to be alone. We can form a duo.
>
> > We're testing with Oracles Linux on VMWare, database files hosted by
> > NetApp.
>
> > Too many variables to locate the bottleneck. When I ran my test
> > yesterday evening, having all systems to myself, performance was 4 times
> > better than during working hours.
>
> netapp has docs on using oracle on their storage. use your support
> account to find them.
>
> anyway, I'd expect many people have complaints about nfs (direct or not)
> performance with DBMS.
>
> regards- Hide quoted text -
>
> - Show quoted text -
Date: Wed, 22 Dec 2010 09:06:05 -0800 (PST)
Message-ID: <b674cbcd-8bad-4b0f-a5e0-88f65b968b86_at_k11g2000vbf.googlegroups.com>
On Dec 21, 3:15 am, "Hank M. Higher" <nom..._at_notformail.com> wrote:
> On 20.12.2010 13:57, Gerard H. Pille wrote:
>
>
>
>
>
> > Noons wrote:
> >> Gerard H. Pille wrote,on my timestamp of 20/12/2010 8:14 PM:
> >>> I was looking around because of some performance problems with Direct
> >>> NFS, but
> >>> it seems nobody has problems with Direct NFS.
>
> >> In what OS platform?
>
> >>> Or is nobody using it?
>
> >> Count 1 here.
>
> > It feels great not to be alone. We can form a duo.
>
> > We're testing with Oracles Linux on VMWare, database files hosted by
> > NetApp.
>
> > Too many variables to locate the bottleneck. When I ran my test
> > yesterday evening, having all systems to myself, performance was 4 times
> > better than during working hours.
>
> netapp has docs on using oracle on their storage. use your support
> account to find them.
>
> anyway, I'd expect many people have complaints about nfs (direct or not)
> performance with DBMS.
>
> regards- Hide quoted text -
>
> - Show quoted text -
I believe that the mount point settings are very important when NFS is used and here is something I found in my notes: http://www.netapp.com/library/tr/3369.pdf
Some settings to check:
hard,bg,rw,vers=3,proto=tcp,intr,rsize=32768,wsize=32768,forcedirectio
You should also check your version specific platform specific installation manual for any notes on the subject in it.
HTH -- Mark D Powell -- Received on Wed Dec 22 2010 - 11:06:05 CST