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Simple and gfs rotation types, Custom, Comparing rotation types – HP Data Protector Express Basic-Software User Manual

Page 53: Running jobs with rotations

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Simple and GFS Rotation Types

These rotation types specify combinations of full and incremental backups that efficiently use a specific

number of media sets. The main difference between the Simple and the GFS rotations are that only the

GFS rotations specify Yearly backups.

Custom

Select this option to create your own rotation.

TIP:

You can select a rotation similar to the desired rotation prior to selecting the custom rotation type and the

values from the previously selected rotation will remain as a starting place. The Calendar view is very

helpful when creating custom rotations.

Comparing rotation types

Data Protector Express provides a variety of media rotation types to select from. Or, you can define

your own media rotation.
The following table compares the historical backups and full data recovery capabilities of each of the

rotation types provided in Data Protector Express.

Rotation Type # of Sets Yearly Sets

Monthly Sets

Weekly Sets

Daily Sets

Simple

4

1 full

1 full

2 full

Simple

6

2 full

1 full

3 full

Simple

10

3 full

3 full

4 incremental

Simple

11

3 full

4 full

4 incremental

Simple

12

4 full

4 full

4 incremental

Daily Append

N (def. 4)

N full

4 incremental appends

GFS

20

2 full

6 full

6 full

6 incremental

GFS

25

2 full

7 full

8 full

8 incremental

GFS

30

2 full

8 full

8 fill

12 incremental

Running Jobs with Rotations

The info bar displays the Current rotation set and the Next rotation set in the Rotation Details section

of the info bar. Before the job is run the first time, both fields have the same value. Once the job runs

successfully, the current rotation set field will display the media that has just been used and the next

rotation set field displays the media that will be used next.

Initial run

The initial run of a rotation job is uses the largest schedule interval in the rotation. For

example, suppose a job is configured to use a GFS 20 rotation starting on a Thursday, October 28th,

2010. Even though a Thursday in the middle of a month would normally be classified as a Daily backup,

the first time the job is run, a Yearly backup will be performed.

Missed jobs

If, for some reason, a run of the job was missed — for example, because the Backup

Server was turned off at the scheduled run time — the scheduler will determine the largest interval missed

and run it automatically a few minutes after Data Protector Express starts again.

User’s Guide

53

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