SC 3.x / Reservation / Volume Managers
Greetings experts,
would you please help me to acquire a better understanding:
1. In SC 3.0 and SC3.1 SCSI-3 PGR is used in a 3 nodes cluster for both, the DCS and the QD disks (in a 2 nodes cluster traditional SCSI-2 Reserve is used for DCS and PGRE for QD devices)
2. In SC 3.2 the same applies unless by specifiying it, SCSI-3 PGR can even be used in a two nodes environment.
Assumed we would have a cluster using SCSI-3 PGR (either item 1 or item 2 or both are fullfilled).
In a SC environment I can use SVM/SDS as volume manager. My understanding is that SVM/SDS knows "only" SCSI-2 and it seems that http://bugs.opensolaris.org/view_bug.do?bug_id=4827356 confirms my understanding.
What would that mean for the cluster in case of a situation in which reservation would take place: would we see two kinds of Reserves on the same disk: a) a SCSI-3 PGR (since the prereqs are fullfilled)plus b) a SCSI-2 Reserve since SVM/SDS knows "only" SCSI-2 Reserves?
And what about VxVM as volume manager?
Thanks hontoy
