Re: [Xen-devel] iscsi patch

[Brian Wolfe <brianw@xxxxxxxxxxxx>]

Well crudpuppies...  8-P I guess I'll have to fall back to a 2.4 kernel
for now and hope all of the evms features that I'm using on 2.6.8 work
in 2.4.x. *sigh* NFS root is just too darn unstable to run any XenLinux
kernels from. 

Just to give you an idea of what I'm trying to acomplish here...

a pair of raid-5 servers would provide evms volumes to the iSCSI target
drivers. Eaxh Xen node machine would mount a iSCSI target from each nfs
server in a raid-mirror block device and export it as a xen block device
to the XenLinux image to run from.

Eventually I want to create an inteligent iSCSI relay target that would
sit on a Linux-HA cluster between the Xen nodes and the iSCSI target
fileservers. Upon failure of either machine it would inteligently resync
the mirrors in a method similar to rsync so we aren't copying entire
multi-gig images across the entwork just to recover a couple blocks of
difference between the mirror sets. I'm not entirely certain how I'm
going to acomplish this as of yet. My first idea was some kind of log
loop device on the iscsi servers that the iSCSI relay process would
write to for checkpointing.

Anyways, it's somethign that doesn't exist yet and that I would like to
eventually put togeather as a HA solution for iSCSI target array. Hence
my interest in iSCSI. :) OpenGFS and other solutions are nice, but
require a spefic filesystem. I'd rather have the client machines totally
unaware of the backend requirements. The clients would just mount iSCSI
devices. A fully encapsulated HA disk array instead of forcing the
client OS to be aware of the complexities in the backend.

On Wed, 2004-08-25 at 02:27, Ian Pratt wrote:
> > Have either of you used a linux based iSCSI target driver? If so, which
> > driver did you use? I've found 4 so far and none of them will compile
> > cleanly against my fileserver running 2.6.8 8-(.
> 
> I use a h/w target. 
> 
> When I last looked the iscsitarget project on sourceforge looked
> most promising from an architectural point of view, but they
> currently only support 2.4.
> 
> http://zaal.org/iscsi has some useful information.
> 
> Ian



-------------------------------------------------------
SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel