[Linux-cluster] requirements question

[Brian Jackson]

On Mon, 26 Jul 2004 17:17:53 -0400 (EDT), linux-cluster-rhn at chaj.com
<linux-cluster-rhn at chaj.com> wrote:
> 
> We've got a fiber channel connection from two nodes to a single san storage
> share (through a brocade). We're looking to export nfs from one of the hosts
> with the other host as failover. As a test, I patched a 2.6.7 kernel and
> compiled the necessary utilities according to
> http://gfs.wikidev.net/Installation. I used LVM2 to create a logical volume on
> the san device (/dev/sda1), gfs_mkfs'd the device according to the clustering
> config that I made, and successfully mounted the lv on both hosts as a local
> drive. Is it necessary for us to use LVM if the san is already doing the
> raid/redundancy?

Nope, in your situation it would be most useful providing stable device naming.

> What is the bare minimum in terms of daemons that we'd need
> in order to run the above setup? I'm thinking it'd be something like:
> 
> ccsd
> cman_tool join
> clvmd
> mount -t gfs /dev/sda1 /mnt/san-name

looks right

> 
> Also, what suggestions do you have for an automatic failover system for the
> two hosts? I imagine some sort of heartbeat package. Thanks for your time.

Currently there is heartbeat (linux-ha.org), and a few others. I
believe redhat is working on one as well that will fit in with their
infrastructure bits

--Brian Jackson

> 
> Jim