STORE and TurboSTORE/iX Products Manual (B5151-90003)

Chapter 2 25
Managing Backups and Backup Media
Determining Your Backup Strategy
• Do you have user volumesets or mirrored volume sets on your system?
If you use volume sets for application and volume management, then you may want to
use the ONVS option of STORE. This option allows you to back up all files on a particular
volumeset, including the system directory information for the volumeset. Doing
backups on a volumeset basis can help reduce downtime by breaking up a large backup
into individual volumeset backups. Recovery time is also increased, since you can
restore from backups that only contain files for a particular volumeset.
If you are using mirrored disks, and you do not have the TurboSTORE/iX 7x24
True-Online Backup product, you can use the SPLITVS option of STORE to back up a
split copy of your mirrored set.
However, if you are using TurboSTORE/iX 7x24 True-Online Backup, the recommended
way of performing mirrored disk backups is to use either the ONLINE=START or
ONLINE=END option. TurboSTORE/iX 7x24 True-Online Backup allows you to back up
your volumeset without losing the protection of the mirrored disks, and without closing
down files.
• Do you have critical applications that need to be available 24 hours a day?
If your system environment includes applications that need to be available on a 24-hour
basis, you should use TurboSTORE/iX 7x24 True-Online Backup. This product provides
three different online backup options:
• ONLINE, which requires files to be closed at the start of the backup.
• ONLINE=START or ONLINE-END, which allow files and applications to remain open
throughout the entire backup.
Using any of the online backup options means that you do not have to dedicate the
system to doing backups. Using the new 7x24 True-Online backup option allows you to
backup files and applications while users are accessing them. Using the normal online
option requires files being backed up to be closed for a short time at the start of the
backup. Normal access can be resumed once the actual backup begins.
The TurboSTORE/iX 7x24 True-Online Backup options allow you to schedule the
sync
point
for the backup at either the beginning of the backup (ONLINE=START) or at the
end of the backup (ONLINE=END). The backup's sync point is the point when the state of
all files being backed up is synchronized. When the backup is restored, all files are
restored to the state they were in at the time of the sync point. TurboSTORE also
synchronizes any TurboIMAGE or ALLBASE/SQL databases being stored, ensuring
that consistent copies of the databases are written to the backup.
See Chapter 7 for more information on using the new TurboSTORE/iX 7x24
True-Online Backup feature.