Hi, When the administrator adds an iSCSI device to the system, that device looks like a SCSI device (at least the Quorum subsystem sees the device as a SCSI device).
Sun Cluster supports an iSCSI device as a Quorum device when the iSCSI device is on the same subnet as the cluster nodes. We do not support an iSCSI device as a Quorum device when the iSCSI device is on a different subnet. The limitation is due to the behavior of iSCSI in Solaris 10. The iSCSI device could be configured for Quorum using any of the following: SCSI2 SCSI3 Software Quorum The iSCSI device that will be used as a quorum device cannot be a disk that is locally connected to only one cluster node and exported via iSCSI. Each cluster node must have a direct path to the device that is not dependent on another node being up. I am not aware of any limitations caused in this area when Sun Cluster runs on LDoms. Regards, Ellard On 07/20/09 12:34, Octave Orgeron wrote: > Thanks for the suggestion. Interested in testing out SC or OpenHA on LDoms > and use iSCSI since I don't have a SAN at home. Thanks! > > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > Octave J. Orgeron > Solaris Virtualization Architect and Consultant > Web: http://unixconsole.blogspot.com > E-Mail: unixconsole at yahoo.com > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > > > > ----- Original Message ---- > From: Ashutosh Tripathi <Ashutosh.Tripathi at Sun.COM> > To: Octave Orgeron <unixconsole at yahoo.com> > Cc: Paolo Merisio <merisiop at gmail.com>; ldoms-discuss at opensolaris.org; > clusters <ha-clusters-discuss at opensolaris.org> > Sent: Monday, July 20, 2009 2:27:24 PM > Subject: iSCSI & Quorum [was: Re: [ldoms-discuss] LDoms 1.2] > > [Cross posting to ha-clusters-discuss] > Hi Octave, > > Given that iSCSI targets are purely a network thing, i doubt > very much if using them with or without LDoms has any difference. > > That leaves the question of how SC/OHAC supports iSCSI disks. > > I believe that we (SC) have focused on OpenSolaris/OHAC for iSCSI support > given the rather large number of issues they have on S10. Perhaps > someone on ha-clusters-discuss can shed more light on this question > (both general iSCSI support as well as supporting those as Quorum disks). > > Regards, > -ashu > > > Octave Orgeron wrote: >> Quick question, are iSCSI disks supported for quorum and in SC or Open HA >> with LDoms? >> >> >> *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* >> Octave J. Orgeron >> Solaris Virtualization Architect and Consultant >> Web: http://unixconsole.blogspot.com >> E-Mail: unixconsole at yahoo.com >> *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* >> >> >> >> ----- Original Message ---- >> From: Ashutosh Tripathi <Ashutosh.Tripathi at Sun.COM> >> To: Paolo Merisio <merisiop at gmail.com> >> Cc: ldoms-discuss at opensolaris.org >> Sent: Monday, July 20, 2009 1:16:40 PM >> Subject: Re: [ldoms-discuss] LDoms 1.2 >> >> Hi Paolo, >> >> Tell us a bit more about the kind of device >> d5 is. The only kind on which Quorum is supported is >> ones backed by full LUNs in the I/O domain. >> >> d5 looks suspiciously small to be a full disk, but >> can you confirm? >> >> -ashu >> >> Paolo Merisio wrote: >>> Ok, here more information about new test. >>> >>> root at n1 # [b]metaset -s 2ds[/b] >>> >>> Set name = 2ds, Set number = 2 >>> >>> Host Owner >>> n1 Yes >>> n2 n3 Driv Dbase >>> >>> d5 Yes [b]Import/export of metaset, mount of fs in metaset are all ok on >>> all 3 nodes[/b] root at n1 # [b]cldev show d5[/b] >>> >>> === DID Device Instances === DID Device Name: >>> /dev/did/rdsk/d5 >>> Full Device Path: n1:/dev/rdsk/c0d2 >>> Full Device Path: n2:/dev/rdsk/c0d2 >>> Full Device Path: n3:/dev/rdsk/c0d2 >>> Replication: none >>> default_fencing: nofencing >>> >>> root at n1 # [b]prtvtoc /dev/rdsk/c0d2s0[/b] >>> * /dev/rdsk/c0d2s0 partition map >>> * >>> * Dimensions: >>> * 512 bytes/sector >>> * 16 sectors/track >>> * 4 tracks/cylinder >>> * 64 sectors/cylinder >>> * 32768 cylinders >>> * 32766 accessible cylinders >>> * >>> * Flags: >>> * 1: unmountable >>> * 10: read-only >>> * >>> * First Sector Last >>> * Partition Tag Flags Sector Count Sector Mount Directory >>> 0 4 00 8256 2088768 2097023 >>> 7 4 01 0 8256 8255 >>> >>> >>> root at n1 # tail -f /var/adm/messages& >>> [1] 5597 >>> >>> Jul 17 09:49:41 n1 Cluster.Framework: [ID 801593 daemon.notice] stdout: >>> becoming primary for 2ds >>> >>> [b]root at n1 # clq add d5 >>> clq: (C192716) I/O error. >>> root at n1 # [/b] >>> >>> No other errors on console of other nodes or messages of other nodes. >>> I hope this helps you to troubleshooting this problem. >>> >>> Thanks >> _______________________________________________ >> ldoms-discuss mailing list >> ldoms-discuss at opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss >> >> >> >> > > > > _______________________________________________ > ha-clusters-discuss mailing list > ha-clusters-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/ha-clusters-discuss
