Tivoli Storage Manager (TSM) Policy Management Overview


    This post describes how TSM manages client backup and archives. TSM Policy Management is the important concept in Tivoli Storage Manager. It defines how client backups are managed in TSM Server Storage. It contains Policy Domain, Policy Set, Management Class, backup copy group and archive copy group.


      Tivoli Storage Manager (TSM) Policy Management Introduction

    1) What is policy management?
Policy management enables the administrator to determine a set of rules how TSM will treat data. This is set of rules is composed of policy domains, policy sets, management class and copy groups.
Policy domain A policy domain is grouping of policy users with one or more policy sets, which manage data.
Policy set: It is a collection of management class definitions. There can be only one active policy set and no. of inactive policy sets.
Management class It is collection of management attributes describing backup and archive attributes. It is associated with backup and archive copy groups
Copygroups: It consists of rules used to govern the data 1) backup copygroup 2) archive copygroup.
    2)   What is policy domain?
When clients are registered, they are associated with domain. A policy domain is grouping of policy users with one or more policy sets, which manage data.
3  3)     What is policy set?
It is a collection of management class definitions. There can be only one active policy set and no. of inactive policy sets
    4)    What is management class?
It is collection of management attributes describing backup and archive attributes.
 It is associated with backup and archive copy groups.
    5)     What is copygroup?
It consists of rules used to govern the retention of data.
There are 2 types
Backup copygroup: it holds rules for backup data.
Archive copygroup: it holds rules for archive data

Also Read: Understanding Management Class Binding and Management Class Rebinding

    6)     What are the default parameters of copygroup?
Destination, VER Exist, VER Delete, RET extra, Ret only, RETver, serialization1111
    7)     What is version exists?
It is used for how many versions to maintain for a file, if it exits in client system
    8)     What is retension extra?
It specifies how many days we have to keep inactive version
    9)     What is version delete?
It specifies how many number of file copies to keep after the file has been deleted
    10)   What is retension only?
It specifies how many number of days to keep the last copy.
    11)   What is copy destination in copy group parameter?
It shows to which storage pool it copies.
    12)   Explain about copy group parameter mode?
It says about the copy group type (i.e. backup or archive).
    13)   Explain about serialization and its parameter?
The Serialization attribute determines whether a file can be in use during a backup, the value for this attribute can be one of the following:
Static: A file or directory must not be modified during a backup. If the object is changed during a backup attempt, it is not backed up.
Shared static: A file or directory must not be modified during backup. Tivoli Storage Manager attempts to perform a backup as many as four additional times. If the object is changed during every backup attempt, it is not backed up.
Dynamic: A file or directory is backed up on the first attempt regardless of whether it changes during a backup.
Shared dynamic: A file or directory is backed up regardless of whether it changes during a backup. Tivoli Storage Manager attempts to perform a backup as many as four additional times. The file is backed up on the last try even if it has changed.

Also Read: Different types of Incremental Backups

    14)   Explain about archive copy group and its parameters and default values?
     
An archive copy group contains attributes that control:
  • Whether a file is archived if it is in use
  • On which media type the server stores archived copies of your files
  • How long the server keeps archived copies of your files

      Parameters
Archive default
Copy group name
Standard
Type
Archive
 Frequency
CMD (Command)
Serialization
Shared static
Mode
Absolute
Destination
Archive pool
Retain versions
365 days




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