which Linux iSCSI target support SCSI 3 Persistant reservations?

Solution 1:

This comparison chart from the SCST project includes information about which projects support persistent reservations.

Additionally, the following mailing list thread may be of interest:

• http://www.spinics.net/lists/linux-stgt/msg02144.html

This is my post to the linux-stgt (aka tgt) project mailing list, which includes some examples of using the sg3-utils package to test SCSI reservations. At the time of this post, the tgt project had support for persistent reservations, but did not support the PR_OUT_PREEMPT_AND_ABORT service action necessary to support RHEL5 i/o fencing.

Solution 2:

The one you need to start looking for is linux-iscsi. It's replacing the kernel iscsi target modules as of 2.6.38 (not yet released, but soon, git). It does support SCSI-3 persistant reservations, I'm using it right now on OpenSUSE 11.3 with a Microsoft Failover Cluster consuming storage via iSCSI.

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Solution 3:

FreeNAS iSCSI targets support SCSI-3 Persistent Reservations. I built a two node Windows Server 2008 R2 cluster running Hyper-V role and was able to Live Migrate a VM from one host/node to the other.