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Re: [Linux-cluster] Starter Cluster / GFS



Nicolas Ross wrote:
Is this the storage you are sharing between the nodes? If so, how exactly are you doing it?

Yes, that if for the shared gfs between the node. What we've decided to use is 2 raid-1 sets of 1 tb (2 disk each), added to a single vg of 2 tb. Other raid sets will be mounted on a per-node and per service basis.

I see. In that case, I dare say that the writes hitting one disk at a time is normal. It's a volume group, not RAID1 per se.

What version of RHEL are you using? Early versions of RHEL5 had GFS2 lock-up issues like you're describing. IIRC, GFS2 was only considered stable from around RHEL 5.5 (technology-preview-only in earlier versions of RHEL). Try with GFS1, it's a lot more mature.

I am currently using RHEL6 beta, while waiting for centos 6 to be out in a couple of weeks. I dont' think gfs1 is included with rhel6.

Interesting. If that really is the same GFS2 bug you're tripping that I bumped into 3 years ago and you're on RHEL6b, that is quite concerning. Doubly so if GFS1 support has been completely removed.

Gordan


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