Managing Backup Policies (Classes)
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Number of Concurrent Streams
The number of streams that can run concurrently for a class or client is
determined by the following:
• Storage unit and schedule multiplexing limit
• Number of drives that are available
• Maximum jobs settings for the class and client
Each storage unit and each schedule has a maximum multiplex setting. The
lower of the two is the limit for a specific schedule and storage unit. The
maximum number of streams that can be multiplexed is limited to the sum of
the multiplexing limits for all drives available in the storage unit and schedule
combinations.
For example, assume two storage units are assigned and the multiplex limit for
each schedule and storage unit combination is four jobs. In this instance, a total
of eight data streams could run concurrently.
The maximum jobs settings also limit the maximum number of streams:
• Maximum Jobs Per Client (global attribute)
• Maximum Jobs Per Class (class attribute)
• Maximum Jobs This Client (see “Client Attributes Tab” on page 485)
The maximum job settings are interdependent as follows:
• If Maximum Jobs This Client is not set, the lowest value of Maximum Jobs
Per Client and Maximum Jobs Per Class is the limiting factor.
• If Maximum Jobs This Client is set, then NetBackup ignores Maximum Jobs
Per Client and uses the lowest value of Maximum Jobs This Client and
Maximum Jobs Per Class as the limiting factor.
Adding Clients to a Class
This section explains how to add clients to a class. To delete clients or change
the list, see “Changing Classes” on page 124.
NetBackup 3.2 System Administrator's Guide for Windows NT
NetBackup 3.2 System Administrator's Guide for Windows NT
