Specifying a snapshot template


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.

Warning

Important

The supported BMC utility that you are using with XBM controls which objects will participate in the snapshot job. The snapshot template specifies the characteristics to be applied to the data set.

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

Compress

Whether to enable compression for this object definition

SSI-assisted snapshot

Whether to enable snapshot processing using intelligent storage DASD

(To enable hardware snapshots, you must also set SSI options. For more information, see Enabling-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.

Warning

Important

A single snapshot template manages all snapshot objects in a job. Therefore, all snapshot objects have the same relative priority.



 

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SNAPSHOT UPGRADE FEATURE for DB2 6.2