why to go with cLVM ?

SUSE Linux Enterprise Extensions SLES High Availability Extension
1

if I have a cluster with either:
1 - dual primary drbd setup with cluster-aware file system(ocfs2) or
2 - shared storage with cluster-aware file system(ocfs2)

then why I do need the cLVM ? ordinary LVM does not work ?

2

Hi sharfuddin,

[QUOTE=sharfuddin;28618]if I have a cluster with either:
1 - dual primary drbd setup with cluster-aware file system(ocfs2) or
2 - shared storage with cluster-aware file system(ocfs2)

then why I do need the cLVM ? ordinary LVM does not work ?[/QUOTE]

changing the LVM layout from one of the cluster nodes will not be noticed by the other nodes, until a reboot.

If you can live with that (i.e. because you use a single OCFS2 partition on the shared media, and won’t change the partitioning), no cLVM is needed.

Regards,
Jens

3

changing the LVM layout from one of the cluster nodes will not be noticed by the other nodes, until a reboot.

I get “changing the LVM layout” as modifying the size of VG/LV ? did I get you properly ?

If you can live with that (i.e. because you use a single OCFS2 partition on the shared media, and won’t change the partitioning), no cLVM is needed.

Got it ;-).

Thanks a lot, you helped me.