clccv command

Purpose

Simplifies the process of using the cross-cluster verification (CCV) utility to compare specific attributes of two different PowerHA® SystemMirror® clusters.

Note: You can also compare specific attributes of two different PowerHA SystemMirror clusters by using the clmgr compare cluster command.

Syntax

clccv [-E] [-d <DIRECTORY>] [-v|-vv|-vvv] [-x] -n <host 1>

clccv [-E] [-d <DIRECTORY>] [-v|-vv|-vvv] [-x] -n <host 1>,<host 2>

clccv -h [-v]

Description

The clccv command compares two different clusters. The cl_ccv_collector command is used to collect data from the clusters to be compared and the cl_ccv_comparator command is used to compare data from both the clusters. You can collect the data on each cluster, and then manually move the data to a location for comparison, or you can use the clccv command to automate the data consolidation process.

If one of the cluster is at a remote site, you can configure the remote execution facilities such as Secure Shell (SSH) and Secure Copy Protocol (SCP) between the clusters. The clccv command can generate the data remotely and collect the data on the local node. The clccv command uses the Expect package to limit the number of password prompts; otherwise, for every connection attempt to the remote site, you are prompted for the password. If you do not want to use the Expect package with the clccv command, you can specify the -E flag.

The results of the cluster comparison are written to the /var/hacmp/clccv/clccv.<first cluster name>.<second cluster name>.<date>.json file. Alternatively, you can use the -d flag to specify a different directory.

Flags

-d: Specifies the destination directory to save the results of cluster comparison. By default, the comparison results are stored in the /var/hacmp/clccv directory.
-E: By default, the clccv command uses the Expect package if it is installed. The -E flag disables the use of the Expect package, even if it is installed.

-v: Enables debug output for tracing program execution.
-n: Specifies the hostname of clusters from which data is collected. If only one host name is specified, the local cluster is used for comparison.

Note: You must specify the hostname that is enabled for SSP and SCP. The hostname might be different than the PowerHA SystemMirrorcluster node name.

Example

To compare the configuration information of one cluster with the configuration information of another cluster, enter the following command:

clccv –n test_cluster, prod_cluster

When you use the -f flag, the collected data might be incomplete and unusable by the cl_ccv_comparator command.