Define an SMS-Managed Key-Sequenced Cluster Specifying Data and Index Parameters: Example 2
In this example, an SMS-managed key-sequenced cluster is defined.
The SMS data class space allocation is overridden by space allocations
at the data and index levels. The DEFINE CLUSTER command builds a
catalog entry and allocates space to define the key-sequenced cluster
SMS04.KSDS02.
//DEFINE JOB ...
//STEP1 EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=A
//SYSIN DD *
DEFINE CLUSTER -
(NAME (SMS04.KSDS02) -
STORAGECLASS (FINCE02) -
MANAGEMENTCLASS (MC1985) -
DATACLASS (VSAMDB05)) -
LOG(ALL) -
LOGSTREAMID(LogA) -
DATA -
(MEGABYTES (10 2)) -
INDEX -
(KILOBYTES (25 5))
/*The parameters for this command are as follows:
- STORAGECLASS is an installation defined name of a storage class, FINCE02, to be assigned to the cluster.
- MANAGEMENTCLASS is an installation defined name of a management class, MC1985, to be assigned to the cluster. Attributes associated with a management class control the cluster's retention, backup, migration, etc.
- DATACLASS is an installation defined name of a data class, VSAMDB05, assigned to the cluster. Record size, key length and offset, etc., are derived from the data class and need not be specified. If MAXVOLUMES or the space parameters (MEGABYTES and KILOBYTES) were not specified, the values in the data class would be used.
- LOG(ALL) specifies that changes to the sphere accessed in RLS and DFSMStvs mode can be backed out and forward recovered using external logs.
- LOGSTREAMID gives the name of the forward recovery log stream.
- MEGABYTES, used for DATA, allocates a primary space of 10 megabytes to the data component. A secondary space of 2 megabytes is specified for extending the data component.
- KILOBYTES, used for INDEX, allocates a primary space of 25 kilobytes to the index component. A secondary space of 5 kilobytes is specified for extending the index component.