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

[Sunil Mushran]

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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