Ok, let me rephrase my concern: What I meant was since you are recommending using different paths via different HBA's, for a given device, it can be shared across a cluster of maximum only those many number of nodes as the number of HBA's on that system. For example if there are 4 HBAs in a box then you can share diskX only in a maximum of a 4-node cluster (via the 4 paths diskX1, diskX2, diskX3 and diskX4).
Another thing, this reduces the redundancy of paths to a device within a particular cluster node. Ideally it should be possible to export the same path to multiple guests to achieve sharing in the true sense. I guess there are some plans to provide such an option in the future releases of LDOMs ? Regards, Misha. On Wed, May 7, 2008 at 9:47 AM, Alexandre Chartre <Alexandre.Chartre at sun.com> wrote: > > Yes, you can create many guest domains on the same box if there are > in different clusters (because you are not going to share disks between > different clusters). > > If guest domains are from the same cluster then you have some limitations > if you want to share disks between guest on the same box. > > alex. > > > Ashutosh Tripathi wrote: > > > Hi Misha, > > > > To clarify this point. > > > > > Doesn't this restrict the number of clusters that can be formed > > inside > > > a box to the number of HBA's available on the box? How well does this > > > scale ? Upto 4 nodes within a box ? > > > > > > > The granuality is on a per *disk* basis, not on a per HBA basis. > > So you should be able to create many guest domains. > > > > -ashu > > > > Misha Chawla Shanker wrote: > > > > > Hi Alex, > > > > > > > > > On Wed, May 7, 2008 at 9:24 AM, Alexandre Chartre < > > > Alexandre.Chartre at sun.com <mailto:Alexandre.Chartre at sun.com>> wrote: > > > > > > > > > Sun Cluster support in guest domain is currently being qualified > > > and > > > it will be officially support on S10U5 with Sun Cluster 3.2U1 (+ > > > some > > > patches). The support is planned to be announced when LDoms 1.0.3 > > > is > > > released. > > > > > > Sun Cluster in guest domain with Nevada should work since build 80 > > > (assuming you use a version of Sun Cluster which works on Nevada). > > > > > > Note that there are some limitations, the main ones in your case > > > is > > > that Sun Cluster shared disks in guest domain have to be virtual > > > disks > > > which backend are physical SCSI disks/luns. > > > > > > Also the same disk should not be exported to different guest > > > domains > > > using the same disk path. The same disk have to be exported to > > > different > > > guest domains using disk paths through different SCSI > > > controllers/HBA. > > > > > > > > > Doesn't this restrict the number of clusters that can be formed > > > inside a box to the number of HBA's available on the box? How well does > > > this > > > scale ? Upto 4 nodes within a box ? > > > > > > Regards, > > > Misha. > > > > > > > > > alex. > > > > > > Maciej Browarski wrote: > > > > Hello, > > > > Is there any chance to have cluster between 3 GUEST Logical > > > Domain on > > > > one physical server? (I use Nevada 85 and openexpress 02/08) > > > > Or Cluster software install on Guest LDOMS some drivers, which > > > need > > > > access to real hardware ? > > > > > > > > Regards, > > > > > > > _______________________________________________ > > > ldoms-discuss mailing list > > > ldoms-discuss at opensolaris.org <mailto:ldoms-discuss at > > > opensolaris.org > > > > > > > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss > > > > > > > > > > > > > > > ------------------------------------------------------------------------ > > > > > > _______________________________________________ > > > ldoms-discuss mailing list > > > ldoms-discuss at opensolaris.org > > > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss > > > > > _______________________________________________ > > ldoms-discuss mailing list > > ldoms-discuss at opensolaris.org > > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/ldoms-discuss/attachments/20080507/a1af6ef2/attachment.html>
