Using N1 Grid Engine 6.1 with an Existing 6.0 Cluster

You can install the N1 Grid Engine 6.1 software in an environment that has an existing N1 Grid Engine 6.0 cluster. To run the 6.1 software in parallel with an existing N1 Grid Engine environment, follow these rules:

• Use a different $SGE_ROOT directory and different TCP ports for the qmaster and execution daemons.

• Do not select to install a system-wide startup script during manual or automatic installation. Installing a system-wide startup script would overwrite your N1 Grid Engine 6.0 startup script for qmaster and execution daemons.

• If you decide to install two execution daemons on one host, be sure to use a different “gid_range” from the global/local cluster configuration.

• On Microsoft Windows systems, you can install the optional “N1 Grid Engine Helper Service” only for one Grid Engine instance. If you already had installed this service for N1 Grid Engine 6.0, you may not install it for N1 Grid Engine 6.1 and, thus, you cannot run jobs that require a GUI on the Windows desktop for N1 Grid Engine 6.1.

• Verify that variables point to the correct instance of N1 Grid Engine. Specifically, check your port settings, your PATH variable, and the LD_LIBRARY_PATH variable. For Solaris and Linux, LD_LIBRARY_PATH does not need to be set anymore.