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Re: [Linux-cluster] Multiple Logical Volumes

isplist logicore net wrote:
My setup includes multiple storage devices. I can either have multiple devices or I can create one large filesystem for all of the nodes in this cluster. Which do you think is best since I can keep adding or taking from a volume group. My machines share CDROM/Floppy so can't boot from those automatically. I do have network boot on each server however and of course, I'd like not to have to use any drives on any of the blades. Then I could put more into the central storage. I'm using fibre channel so all of the nodes see the storage as their own.

Thanks for all this info, I'll continue looking for more and build one of these. I am sure it's exactly what I need over having to build multiple machines all the time.

Hi Mike,

Given that all boxes can see the shared storage, I guess I'd recommend making a separate file system for each diskless client's root partition. That way, each can't
interfere with one another's root fs.

I may have to give some more thought to how I'd set this up. The problem is,
your clients aren't going to have access to the GFS file systems until they
start running the init scripts, such as ccsd, cman, fenced, clvmd, etc.
Therefore the kernel won't be able to see it as a boot device when the kernel boots.

Since each client needs its own root partition, not to be touched by the others anyway, perhaps you can create tiny ext3 partitions on the SAN for each one to boot from.
I'll have to think about that.

You could also look at: http://sources.redhat.com/cluster/faq.html#gfs_diskless


Bob Peterson
Red Hat Cluster Suite

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