[Ocfs-users] OCFS write/read across 2 nodes

[Dermot Reynolds]

Ah ok, I just checked the versions on the download site and am 100% that I
am using < 1.0.12 .

Let me get that version working.

Thanks for the assistance.... much appreciated.
Dermot


-----Original Message-----
From: ocfs-users-bounces at oss.oracle.com
[mailto:ocfs-users-bounces at oss.oracle.com]On Behalf Of Sunil Mushran
Sent: 08 June 2004 19:37
To: Wim Coekaerts
Cc: ocfs-users at oss.oracle.com
Subject: Re: [Ocfs-users] OCFS write/read across 2 nodes


I stand corrected.

I just tested this on 1.0.12 and it appears to be working. As in, in
t=1, cat returns 2.

I remember dealing with this issue few months ago.

What version are you using?

On Tue, 2004-06-08 at 10:53, Wim Coekaerts wrote:
> eh this has ntohing to do with shared mmap
>
> we should have actually killed off the pages after close of the cat, so
> this seems to still be a problem,
>
> this is a bug imo . we re supposed to invalidate buffers on close
>
> On Tue, Jun 08, 2004 at 10:04:33AM -0700, Sunil Mushran wrote:
> > Yes. ocfs does not supported shared mmap. So what's happening is that
> > when you do the cat on node B in t1, the kernel does not read from the
> > disk, just from the buffer cache. odirect reads will read the correct
> > data.
> >
> > On Tue, 2004-06-08 at 05:20, Dermot Reynolds wrote:
> > > Hi,
> > >
> > > If I have ocfs on 2 nodes should I be able to do the following:
> > >
> > > t=0
> > >     Node A
> > >         echo "1" > /ocfsmount/a
> > >
> > >     Node B
> > >         cat /ocfsmount/a
> > >
> > > >>>>Question 1: At this point should I see "1"?
> > >
> > > t=1
> > >     Node A
> > >         echo "2" > /ocfsmount/a
> > >
> > >     Node B
> > >         cat /ocfsmount/a
> > >
> > > >>>>Question 2: At this point should I see "2"?
> > >
> > > The problem is that at t=1 I am still seeing "1", however when I run
> > > ocfstool on node B I can see "2".
> > >
> > > Assuming that this is correct behaviour this must imply that Oracle
> > > writes and reads to/from the filesystem in a different manner.
> > > Is this where o_direct comes in?
> > >
> > > Thanks
> > > Dermot
> > >
> > >
> > >
> > >
> > > ______________________________________________________________________
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