CFS Cluster

[anoop_10]

Hi,

I have CFS cluster (2 node) configured in my site. Is it possible to mount the same file system (CFS file system) In another single node?.If possible what are the steps I have to follow?Please help me to find a solution.

Regards
Anoop

[Hasan Atasoy]

hi anoop ;

it is possible to share a bit more your planning ? you would like to add a third node to cluser or you want to mount directly disks in third single node beside cluster.
if so you will corrupt the filesystem. because each machine will not aware ( cluster and single node ) the operation on the nodes.
the nodes in cfs cluster talk each other with a special protocoll ( llt and gab ) and aware what is being done in cluster.
but if you would like to down the cluster and mount the filesystem ( or clones ) in another machine ; then cfs filesystems are vxvm filesystems so it is easy to mount them .

Hasan

[anoop_10]

Hi hasan ,

I am planning to halt the cluster and present the vdisks to a single node ,with out Cluster mount the same disk over there and try to access the data. If its possible please let me know what needs to be done.

Regards
Anoop

[anoop_10]

Hi hasan ,

Thanks for your replay

I am planning to halt the cluster and present the vdisks to a single node ,with out Cluster mount the same disk over there and try to access the data. If its possible please let me know what needs to be done.

Regards
Anoop

[Hasan Atasoy]

hi anoop ;
if you will not present back your disk to cluster after changes on single node than ;

1. unpresent disks from cluster
2. present disk to single node . ( these node should have vxvm configured )

in the new server.

3. vxdctl enable
4. vxdisk scandisks
5. vxdisk list ( look at volume group names )
6. vxdg import diskgorup
7. vxrecover -g diskgroup -sb


mount filesystems

please look at

http://www.docs.hp.com/en/B7961-90018/ch05s10.html


Hasan

[anoop_10]

Hi ,

Thanks

I will try this, Is it possible to present the same vdisks back to cluster nodes and make the cluster Up?

Regards
Anoop

[Kevin Wright]

If you are using cfs with cvm, you can mount the shared filesystems on one server only, or ro only, etc.

[Stephen Doud]

At this site: http://docs.hp.com/en/ha.html#HP%20Serviceguard%20Storage%20Management%20Suite
are the extracts for both supported versions of Cluster File System HP Serviceguard Storage Management Suite

Page 10 of http://docs.hp.com/en/T2771-90034/sgsms_cfs_extracts.pdf describes supported features.

Unless you are using the Cluster File System within the cluster, it sounds like what you want to do falls under the "Unsupported Features" category described on page 11.