Case to analyze

Suppose you need to automate a tape rotation for the case if:

• the full size of the data to protect is approximately 320 GB
• the approximate size of daily changes of data is about 16 GB
• the approximate size of weekly changes of data is no more than 40 GB
• tape capacity is 400 GB.

Let’s analyze the results of a combination of GFS and ToH schemes with different tape options for the case.

All the below analyzed examples are a simplistic approach to a real case, but provide you with a general conception of backup distribution onto tapes.

Legend for the case example figures

Any daily/incremental backup (16 GB) is shown in the figures as a green rectangle: .

Weekly/differential backups (40 GB) are displayed as a blue rectangle: .

Any full monthly backup (320 GB) is drawn in orange:

.

A whole tape (400 GB) is drawn as a gray rectangle:

.