1.Copy the template file from /opt/cmcluster/toolkit/SGSRDF/srdf.env to the package directory.
2.Change the value of the RDF_MODE variable to Asynchronous.
RDF_MODE=async
3.Change the value of the CONSISTENCYGROUPS variable to 1.
CONSISTENCYGROUPS = 1
Metrocluster with EMC SRDF is already installed
If Metrocluster SRDF is already installed and the Serviceguard applications use SRDF/Asynchronous data replication, you must make the following changes in the srdf.env file:
1.Change the value of the CONSISTENCYGROUPS variable to 1.
CONSISTENCYGROUPS = 1
2.Clear the value set for the SYMCLI_MODE environment variable, if set previously.
Setting up the RDF Daemon
The cycle switch process required for SRDF/A MSC is provided by the Solutions Enabler software executing a RDF daemon that implements the MSC functionality. You can enable or disable this RDF daemon on each host using the SYMAPI_USE_RDFD option in the SYMAPI file. The use of this RDF daemon is enabled or disabled on each host using the SYMAPI options file.
The default value of the SYMAPI_USE_RDFD option is Disable. To enable the RDF daemon, set the SYMAPI_USE_RDFD to ENABLE.
Setting this option to ENABLE activates the RDF daemon for SRDF/A MSC. It is recommended that you enable the daemon on multiple hosts.
Starting and Stopping the Daemon
There are multiple ways in which you can start the RDF daemon. You must start the daemon on all nodes in the cluster. If you have enabled the RDF daemon, Solutions Enabler software automatically starts the daemon. Alternatively, you can manually start the daemon using the stordaemon command:
stordaemon start storrdfd
By default, the stordaemon command waits 30 seconds to verify that the daemon is running. To override this default value, use the
In addition, you can set the daemon to start automatically every time the local host is started. You can set this condition for the daemon using the following command:
stordaemon install storrdfd
To stop the RDF daemon, run the following command:
stordaemon stop storrdfd
Building Continentalclusters Solution with EMC SRDF
The following section describes how to configure Continentalclusters solution using EMC SRDF, which requires the Metrocluster with EMC SRDF product.
Setting up a Primary Package on the Primary Cluster
Use the procedures in this section to configure a primary package on the source disk site. Consult the Managing Serviceguard user’s guide for more detailed instructions on setting up Serviceguard with packages, and for instructions on how to start, halt, and move packages and their services between nodes in a cluster.
Building Continentalclusters Solution with EMC SRDF 299