FW: [Ocfs-users] Observations

[Sunil Mushran]

doubt whether an o_direct enabled ftp exists.
but one never knows. google it.

other option is, write it and share it with others. :-)

On Mon, 2004-08-30 at 14:52, Shivaprasad Kambalimath wrote:
> Hi Wim,
> 
> Thanks for your reply. I would like to know your inputs on the FTP
> option.
> 
> I'm not sure your first line 'no' meant for FTP or Sync. I guess it is
> for sync.
> 
> Regards,
> shiva
> -----Original Message-----
> From: wim.coekaerts at oracle.com [mailto:wim.coekaerts at oracle.com] 
> Sent: Monday, August 30, 2004 2:34 PM
> To: Shivaprasad Kambalimath
> Cc: Sunil.Mushran at oracle.com; ocfs-users at oss.oracle.com; Varghese
> Abraham
> Subject: Re: FW: [Ocfs-users] Observations
> 
> no
> sync sync dirty buffers to disk. that's all it does
> 
> if you do it on ocfs it will do that as well but it doesn't do it across
> clusters or whatever.
> 
> I guess we could invalidate all cache after a sync but.. hmm well
> that would not be a pretty sight
> 
> On Mon, Aug 30, 2004 at 02:13:00PM -0700, Shivaprasad Kambalimath wrote:
> > Hi Sunil,
> > 
> > I'm looking into this thread now.
> > 
> > Does this mean we cannot use FTP option to copy OCFS files to ext3? If
> > so, is there any ftp version available for OCFS, similar to cp
> > --o_direct?
> > 
> > Also, is there any version of sync available for OCFS (in normal FS,
> > sync does a refresh of FS from kernel cache so that the FS is
> > consistent). By this can we say that the FS shard by both nodes is
> > consistent?
> > 
> > Regards,
> > Shiva
> > 
> > -----Original Message-----
> > From: Shivaprasad Kambalimath 
> > Sent: Monday, August 30, 2004 1:55 PM
> > To: Varghese Abraham
> > Subject: RE: [Ocfs-users] Observations
> > 
> > Varghese,
> > 
> > This means we cannot use FTP at all. Pls ask them if there are any
> > tools/commands to do ftp.
> > 
> > Also ask abt options of sync (in normal FS, this does a refresh of FS
> > from cache) if anything of that sort available for OCFS. 
> > 
> > -shiva
> > 
> > -----Original Message-----
> > From: Varghese Abraham 
> > Sent: Monday, August 30, 2004 1:46 PM
> > To: Shivaprasad Kambalimath
> > Subject: FW: [Ocfs-users] Observations
> > 
> > 
> > 
> > -----Original Message-----
> > From: Sunil Mushran [mailto:Sunil.Mushran at oracle.com]
> > Sent: Monday, August 30, 2004 1:45 PM
> > To: Varghese Abraham
> > Cc: ocfs-users at oss.oracle.com
> > Subject: RE: [Ocfs-users] Observations
> > 
> > 
> > Yes. The buffer cache in kernel does not keep track of
> > changes across the cluster. So, if node 1 has an image
> > of the block on disk and node 2 changes that, the
> > buffer cache in node 1 still reflects the old image.
> > o_direct solves that as the disk always contains the
> > current image.
> > 
> > On Mon, 2004-08-30 at 13:31, Varghese Abraham wrote:
> > > Hi Sunil , Wim
> > >  Thanks for your inputs.
> > > 
> > > We are on Linux AS 2.1 kernel e38
> > > OCFS version 
> > > ----------------------------------
> > > [root at usingorcdb03 root]# rpm -qa | grep ocfs
> > > ocfs-tools-1.0.10-1
> > > ocfs-2.4.9-e-enterprise-1.0.12-1
> > > ocfs-support-1.0.10-1
> > > [root at usingorcdb03 root]#
> > > --------------------
> > > 
> > > 
> > > Regarding point 2, can you clarify a bit further.
> > > 
> > > What I understand from your / wim's mail is that data blocks would
> be
> > present somewhere in memory buffer
> > > and when we copy / ftp , those Memory blocks are getting used.
> > > Is my understanding right.  ?  
> > > ( Should this be the case even when the database is shutdown , that
> > Linux would use memory buffers to do a copy /ftp. )
> > > 
> > > R'gds
> > > Varghese Abraham.
> > 
> > 
> > 
> > _______________________________________________
> > Ocfs-users mailing list
> > Ocfs-users at oss.oracle.com
> > http://oss.oracle.com/mailman/listinfo/ocfs-users
> 
> 
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