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 <[email protected]> wrote: > From: David Coulson <[email protected]> > Subject: Re: [Ocfs2-users] hardware needed for OCFS > To: [email protected] > Cc: [email protected] > 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 > <[email protected]> wrote: > > > > > >> From: David Coulson <[email protected]> > >> Subject: Re: [Ocfs2-users] hardware needed for > OCFS > >> To: "Pete Kay" <[email protected]> > >> Cc: [email protected] > >> 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 > >>> > >>> > >> > ------------------------------------------------------------------------ > >> > >>> > _______________________________________________ > >>> Ocfs2-users mailing list > >>> [email protected] > >>> > http://oss.oracle.com/mailman/listinfo/ocfs2-users > >>> > >> _______________________________________________ > >> Ocfs2-users mailing list > >> [email protected] > >> http://oss.oracle.com/mailman/listinfo/ocfs2-users > >> > > > > > > > > _______________________________________________ > > Ocfs2-users mailing list > > [email protected] > > http://oss.oracle.com/mailman/listinfo/ocfs2-users > > _______________________________________________ Ocfs2-users mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-users
