Activity Priority Overview


Since a backup set can only be processed by one activity at a time, each activity on the DS-System has a priority level which resolves conflicts when more than one activity tries to process the same backup set. This determines the order in which activities can access and lock a backup set for processing.

The default Activity Priorities are listed in the following table. You can use the Activity Priority Schedule to adjust the level of any of these activities to a value in the corresponding Valid Range.
Activity
Iock_type *
Default Priority Level
(Lower # is higher priority)
Valid Range
1
System Compression
lock_type=12
1-10
2
Disaster Recovery
lock_type=15
1-2
3
Replication Receive
lock_type=22
1-10
4
Replication Delete
lock_type=23
1-10
5
Backup
lock_type=1
2-10
6
Restore
lock_type=3
2-10
7
Delete
lock_type=4
2-10
8
Retention
lock_type=5
2-10
9
Synchronization
lock_type=6
2-10
10
Validation
lock_type=7
2-10
11
Migration
lock_type=8
2-10
12
BLM Archiving
lock_type=9
2-10
13
Replication Send
lock_type=21
2-10
14
Replication Send - Repair
lock_type=32
2-10
15
Retire Storage
lock_type=16
2-10
16
Storage Scan
lock_type=17
2-10
17
System Validation
lock_type=13
2-10
18
File optimization
lock_type=14
2-10
19
Group Admin
lock_type=19
2-10
20
Deactivate DS-Client
lock_type=28
1-20
21
System Admin
lock_type=10
2-12
22
System Autonomic Healing
lock_type=11
2-12
23
CDP backup
lock_type=2
2-12
24
System Backup
lock_type=25
10-20
25
Storage Statistics
lock_type=18
10-20
26
Clean Libraries
lock_type=26
2-20
27
Clean Logs
lock_type=30
2-20
28
Empty Trash
lock_type=31
10-20

* The"lock_type" number refers to the ID that is displayed in the System Status - Backup Set Locks Tab (DS-Operator > Setup menu > System Activities: System).

To change activity priority, you use an Activity Priority Schedule. Each Activity Priority Schedule contains a list of Schedule Details, which are the day(s) and time window(s) when the activities have specific priority.

Initially, there is one <DEFAULT> Activity Priority Schedule and all DS-Clients are assigned to it. (New DS-Clients are automatically assigned to the <DEFAULT> schedule.)

The <DEFAULT> Activity Priority Schedule has two Schedule Details:

TIP 1: These default settings work well, and you should only consider altering them for very specific situations or requirements.
TIP 2: To change the activity priorities for all DS-Clients at the same time, you can adjust the <DEFAULT> schedule.

For DS-Clients with special requirements, you can create a special "Activity Priority Schedule" and assign those DS-Clients to it.

The following considerations should be made when assigning priority levels:

Example: The most common priority request is for CDP Backups to increase from its default level of "12" during the working day (8AM-6PM) in order for protected backups to not be interrupted by System Admin, Autonomic Healing, Replication, etc. This is addressed by the second detail in the <DEFAULT> schedule.

How the Schedule Details are applied:



PREVNEXT