BacPac's new disk duplication feature provides a way to make image copies of
VMS disks over a network between VMS systems which are not clustered.
This feature allows production system disks to be duplicated onto a backup
computer system for rapid recovery from a production system failure. Switchover
to the backup system is very fast because there is no need to wait for the disks
to be restored from backup savesets.
BacPac can also write a saveset at the same time so that a redundant backup
of the disk is available.
In addition to duplicating entire disks, BacPac can also perform fast copying
of files and directories between VMS systems which are networked together.
Highlights / Uses
Reduce disaster recovery time by as much as 50%
Backup disks from a production system to a remote disaster recovery system. By
duplicating the disks instead of creating savesets, the disks are immediately
available for use and eliminate the time that would be required to restore them
from the savesets.
Increase backup safety with simultaneous disk & saveset backups
Create a duplicate disk and a backup saveset at the same time. If the disk fails,
the data is still recoverable from the saveset.
Create offsite backups without having to copy or transport tapes
Save the cost and time of copying and transporting offsite backup tapes by backing
up remotely over the network to the offsite computer. Duplicate disks or create
savesets on the remote system.
How it Works
BacPac uses a Client/Server architecture to accomplish the disk image duplication.
When the BacPac command is executed on the source system, the BacPac Client
connects to the BacPac Server on the target system and begins copying the source
disk. The Client reads the disk, compresses the data, and sends it to the BacPac
Server. The BacPac Server receives the data, decompresses it, and writes it to
the target disk.
If requested, the BacPac Server will also write the disk data to a saveset
on a different target system disk, creating a redundant backup in case the target
disk fails.
