[Ocfs2-users] hardware needed for OCFS

[Luis Freitas]

  What I mean is that they have the full TCP/IP stack in them, and provide a SCSI interface to the kernel, so there is no additional CPU load using them.

  One could instead of using a iSCSI adapter, use a common etherned adapter and mount the iSCSI target using a software driver. The main CPU would have the additional load of disassembling the TCP/IP packets and routing them.

  Btw, I never actually used one of these boards.

Regards,
Luis 


--- On Fri, 12/19/08, David Coulson <david at davidcoulson.net> wrote:

> From: David Coulson <david at davidcoulson.net>
> Subject: Re: [Ocfs2-users] hardware needed for OCFS
> To: lfreitas34 at yahoo.com
> Cc: ocfs2-users at oss.oracle.com
> Date: Friday, December 19, 2008, 10:26 AM
> Typically I find folks use 'NAS" to refer to
> filesystem level sharing (NFS, Samba), and SAN for block
> level (FC, iSCSI).
> 
> There are plenty of iSCSI HBAs (I've only used the ones
> from qlogic), however they don't 'simulate'
> anything - They're just a SCSI adapter with an iSCSI
> backend.
> 
> Luis Freitas wrote:
> >   If your NAS can do iSCSI you could use it to provide
> a shared block device.
> > 
> >   The performance wont be as good as a SAN as the data
> has to go through the kernel TCP/IP stack, it can be
> comparable if you have a iSCSI IP accelerator board that
> simulates a hba.
> > 
> > Regards,
> > Luis
> > 
> > 
> > --- On Fri, 12/19/08, David Coulson
> <david at davidcoulson.net> wrote:
> > 
> >   
> >> From: David Coulson <david at davidcoulson.net>
> >> Subject: Re: [Ocfs2-users] hardware needed for
> OCFS
> >> To: "Pete Kay" <petedao at gmail.com>
> >> Cc: ocfs2-users at oss.oracle.com
> >> Date: Friday, December 19, 2008, 9:57 AM
> >> OCFS2 requires a block device (local disk, direct
> attached,
> >> SAN), so it's not going to work with a NAS
> (Samba, NFS, etc)
> >> mount. You can, of course, share a OCFS2
> filesystem using Samba or NFS.
> >> 
> >> Pete Kay wrote:
> >>     
> >>> Hi,
> >>> 
> >>> Does OCFS require NAS hardware to run or does
> normal
> >>>       
> >> PC hard disk work?
> >>     
> >>> Thanks,
> >>> Pete
> >>> 
> >>>       
> >>
> ------------------------------------------------------------------------
> >>     
> >>>
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