troubleshooting Question

Is cLVM necessary when accessing different logical volumes on a shared iSCSI target?

Avatar of chschroe
chschroeFlag for Germany asked on
4 Comments1 Solution396 ViewsLast Modified:
I have an iSCSI server (using LIO) which provides one LUN. Two client machines each connect this same LUN. From the client's perspective, let's say it shows up as device /dev/sda. I have then in one client created a partition /dev/sda1 with type 8e (LVM). The partition immediately shows up in the other client.
After that, I have created a physical LVM volume (pvcreate /dev/sda1) and a volume group (vgcreate shared /dev/sda1). Note that I have not enabled cluster mode for this volume group. Again, both the physical volume and the volume group are immediately visible to the other client.
When I create in one client a logical volume in this volume group, it is visible to the other client, but it is unavailable. This works in both directions, i.e. I can create a logical volume in one client or the other, and it is always visible, but unavailable to the other client.
So far, everything seems to work fine. Now my question is: Is this setup sufficient or do I need cLVM? I have tried to install cLVM, but had some problems, because I do not have (and probably do not need?) a cluster manager.
Could anybode explain when cLVM is needed in general and if it is necessary for me?
Rick Hobbs

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Top Expert 2006

The Distinguished Expert awards are presented to the top veteran and rookie experts to earn the most points in the top 50 topics.

Join our community to see this answer!
Unlock 1 Answer and 4 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 4 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros