shared file system on a cluster

[meekrob]

i need to have a file system shared between two hp-ux server (cluster system , MC service guard )
so we buy the (service guard extension for RAC)
did that solve the problem ,? if yes , i install only the software by swinstall and then i mount the file system on the two servers or i need special configuration?

[Steven E. Protter]

Shalom,

RAC is special because it runs in active-active mode on more than one cluster node at a time. SG in general does not. It does do so with RAC.

SG works with almost any software whether it is installed by swinstall or compiled, which is pretty much the case with Oracle RAC.

The user guide that came with the RAC extension includes the steps you need to create shared filesystesms on a volume group mounted in shared mode.

There are a number of ways to activate a volume group: Normal activation, exclusive and shared. For RAC as I understand the product, the mode you want is shared.

SEP

[A. Clay Stephenson · Accepted solution]

Service Guard eRAC enables the Cluster File System which will enable using fully cooked files on multiple nodes in the cluster simultaneously. To each node, it appears to be a conventional vxfs filesystem but it is actually mounted on multiple hosts and cache-coherency is preserved. It does require an additional network for the filesystem itself.