Christine Caulfield wrote:
Sajesh Singh wrote:
Centos 4.6
Cluster Suite
I am currently running a 2 node GFS cluster. The storage is provided
via a fiber channel connection to the SAN. Each node currently has a
single FC connection to the SAN. I would like to migrate to using
dm-multipath with each node having dual fiber channel connections to
the SAN. Can I assume that CLVM is aware of the /dev/dm-# devices
that are used to access the multipathed devices? Are there any
gotchas that are associated with installing the
device-mapper-multipath software after the GFS cluster is up and
running? Are there any howtos available for this type of setup?
clvmd works fine with dm-multipath devices. You will probably have to
edit /etc/lvm/lvm.conf to exclude the underlying /dev/sd devices to
stop it getting confused though.
You won't be able to do this with GFS mounted on the local node
though, you'll have to umount it, setup dm-multipath, vgscan &
remount. You CAN leave them mounted on other nodes while you do it.
Christine,
Should clvmd be restarted as well so that I can create new
volume groups? I have device-mapper-multipath setup, but if I try to run
pvcreate /dev/mapper/mpath1p1 the command just hangs without any errors.
Regards,
Sajesh
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