why to go with cLVM ?

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 ?

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

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.