Can share hsnfs file system through nfs.

[gb karki]

Hi Guru,

We have 2 nodes cluster and installed SAP and oracle, at the SGeSAP integration time we have shared 2 file system(/usr/sap/trans and /sapmnt/) through HANFS.


Now appication team wants add one more application server for temporary basis(2-3 days) and we need to share these file system also.

Suppose i will change the hanfs that time i need downtime, but they are not ready for downtime.

Can i share simply through NFS?
I did also and it's working fine.

my query is what is impact of this?

Regards
Karki

[Michal Kapalka (mikap)]

hi,

temporary you could change the /etc/exports

for example :

/export/usr/sap/trans -access=SAPDB:SAPCI:APP1:APP2:....:APPx

end them exportfs -a


and the configuration will be set.

hope it will help.

mikap

[Michal Kapalka (mikap)]

hi,

impact could be only when the NFS server that exports the SAP binary files will go down, and them exported with the NFS module from MC/SG,
the temporary added APP server will not have access to the share, but you could modify the entries from hanfs.sh and if the NFS will switch to alternate NOD, the configuration will be automaticaly applied.


mikap

[gb karki]

Hi,

I have put the entry in /etc/dfs/dfstab.

and give shareall command.

and mounted in client, it's working properly.

will it impact for failover the node?

Regards
Karki

[Michal Kapalka (mikap)]

hi,

only if the package on the cluster that, switch to another node, and the configuration is not set. What i know the hanfs.sh script should be edited.

/etc/cmcluster/PACKAGE_NAME/hanfs.sh

mikap

[gb karki]

Hi Michal,

I think you are not getting my point.

we have edited the hanfs.sh scripts and added the three application servers but application team wants to share same file system in new one application server without down time.

I will edit the hanfs.sh and put the new server entry, that time i need downtime for stop and start the nfs services.

but i did same file system entry in dfstab and given share permission to new server only.

rest of thing are same not changed.

what are the impact?

Regards
Karki

[Michal Kapalka (mikap)]

hi,

no, it should be not a impact because if some package will go down and start again the new configuration will be applied.

the exported NFS permission will be applied.

mikap