The cluster data set (CDS) records status on disk,
for use in restart situations. Data set attributes are the same as
a master control data set. You must create the cluster data set before
you enable clustering for a logical partition.
XRC uses a cluster data set name in the following form:
mhlq.XCOPY.ClusterName.CLUSTER
The ClusterName can be up to eight characters
long and must be the same name specified on the XRC parmlib parameter
of ClusterName under the STARTUP category.
Guidelines: Use the following guidelines to
allocate the cluster data set:
- Place the cluster data set on a different volume from the journal
data sets, ideally on its own volume.
- Allocate the data set with physical sequential organization, and
without extended format.
- Before the first use of a cluster data set, initialize the data
set with IEBDG.
- Do not allocate the cluster data set in the Extended
Address Space (EAS) of an Extended Address Volume (EAV).