HEllo Vipin,
lease see the SAP note 156982- Additional information about upgrading to SAP liveCache 7.9, it has the unswer on your question in II, section 4.
"The upgrade guide does not provide any information for upgrade steps in a
Microsoft Cluster (MSCS). The upgrade routine differs from the description in
the guide. For an SAP liveCache upgrade in an MSCS environment, you must use SAP
Note 1461279. After the upgrade steps from SAP Note 1461279 have been completed,
you can use the upgrade guide as of section 5 "Post-Upgrade" again."
Regards, Natalia Khlopina