Management sets
Software and hardware snapshots use snapshot templates to specify the format of the cache and other attributes. You specify and activate a single template that applies to all snapshot jobs that run while that template is activated. Instant Snapshots do not use snapshot templates.
The snapshot template, which is saved in a management set, is the XBM control structure that you use to specify attributes to be associated with each data set when performing a snapshot. A template consists of attributes that specify how to handle the data objects during snapshot processing. The template also controls whether to enable hardware snapshots. You create snapshot templates through the ISPF interface. The snapshot-enabled utility controls which data sets are processed.
You specify the characteristics described in the following table in your snapshot template.
Attribute | Description |
|---|---|
Cache limits | The maximum amount of storage to provide for the managed object If the object definition includes multiple data sets, the cache limit is a maximum per data set. |
Cache type | The type of storage in which to cache managed objects |
Priority | A number that determines the managed object’s precedence when there is contention for cache |
Compress | Whether to enable compression for this object |
SSI-assisted snapshot | Whether snapshot processing using intelligent storage DASD is enabled (To enable hardware snapshots, you must also set SSI options. For more information, see Performing hardware snapshots.) |
Attributes in the snapshot template, including cache type, cache limit, compression, and whether SSI-processing is enabled, affect how XBM operates during software and hardware snapshot processing.
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