Thanks. I now understand better GFS2. I probe GFS2 in a cluster of 4 nodes identicals. Maybe for that i dont have problems when I mount /dev/sdb in all nodes. I think is best using LABEL or CLVM. 2010/2/16 Steven Whitehouse <swhiteho@xxxxxxxxxx>: > Hi, > > On Mon, 2010-02-15 at 13:33 -0800, Scooter Morris wrote: >> On 02/15/2010 12:42 PM, Jos Vos wrote: >> > On Mon, Feb 15, 2010 at 01:20:35PM -0500, Mario Salcedo wrote: >> > >> > >> >> Hi, I am configuring a Red hat cluster. In the guide say: "A GFS2 >> >> file system must be created on an LVM logical volume that is a linear >> >> or mirrored volume". Is that true. >> >> >> >> I create GFS2 without LVM. I think all ok. >> >> >> > Not really... >> > >> > How do you ensure then that the device paths of the GFS filesystems >> > are the same on all nodes (as is required by the shared cluster.conf)? >> > >> > A shared disk may appear as /dev/sda in one node, but as /dev/sdb on >> > another node, for example, dependent on hardware or configuration >> > details. >> > >> > >> Actually, this is not really true. We have many GFS2 filesystems on a >> three node cluster and we don't use LVM. It really depends on how you >> are mounting the filesystems. You really need to mount them by LABEL, >> so the underlying disk identifiers becomes irrelevant. >> >> -- scooter >> > Any underlying storage system should be ok provided it provides the > guarantees required by GFS2 in terms of caching and ordering of > operations. The reason that the docs mention the use of CLVM is that it > is a requirement for support, not because other solutions (including > direct sharing of disks) will not work, > > Steve. > > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster > > -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
