HP B6960-96035 - Manual (Page 338)

Figure 103 Overview of backup and automated media copy sessions
Example 2: automated media copying of Oracle database backups
Your company has an Oracle database of the size of 500 GB. You want to perform
a full backup of the database daily. The backup must be performed outside the
company's working hours, which means that it can start after 5 PM and must finish
before 8 AM on the next day; it can also run during weekends.
You use automated media copying to make copies of the backup media, which will
remain on site for restore purposes. The originals will be moved to an off-site vault
for safety reasons. The media should be copied after the backup finishes. To do this,
you will use post-backup media copying.
You use an HP StorageWorks 10/700 Tape Library with 10 LTO drives, and LTO
Ultrium 1 media. Based on previous experience, you assume that the data transfer
rate is about 80 GB per hour, and the average capacity of a medium is 153 GB.
The media used for backup and media copying become non-appendable after the
media copy operation, so you may want to use as much tape space as possible. On
the other hand, you want the backup to finish as soon as possible. You use 4 devices
for the backup. It is recommended to start with empty media and use their maximum
capacity.
Automated media copying starts after the backup is completed. You have 4 media
to copy, so you use 8 devices for the operation. This means that 4 devices will be
used for source media, and 4 devices for target media.
It is assumed that the media copying will take approximately the same amount of
time as the backup.
Further information 338