Using the multiple copy synthetic backups
method
The multiple copy
synthetic backups method introduces the capability to produce a
second copy of a synthetic backup at a remote site as part of a
normal synthetic backup job.
This method provides the following benefits:
-
It eliminates the bandwidth cost of copying
synthetic full backups to another site.
Instead of duplicating a
local synthetic full backup to a remote site to produce a second
copy, it is more efficient to produce the second copy by using data
movements only at the remote site.
-
It provides an efficient method to establish a
dual-copy disaster recovery scheme for NetBackup backup images.
Table: Comparing synthetic copy process
with and without method enabled emphasizes how the synthetic
full backup produced at the remote site is a clone, or a second
copy, of the first copy produced at the local site.
Table: Comparing synthetic copy process with and
without method enabled
|
Step
|
Without using the multiple copy synthetic backups method:
|
Using the multiple copy synthetic backups method:
|
|
1
|
A full backup is performed at the local site (Site A).
|
Step 1 remains the same.
|
|
2
|
The full backup is duplicated to the remote site (Site B).
|
Step 2 remains the same.
|
|
3
|
An incremental backup is performed at Site A.
|
Step 3 remains the same.
|
|
4
|
The incremental backup is duplicated to Site B.
|
Step 4 remains the same.
|
|
5
|
Steps 3 and 4 are repeated each time an incremental schedule
runs.
|
Step 5 remains the same.
|
|
6
|
A full synthetic backup is produced at Site A.
|
Step 6 remains the same.
|
|
7
|
The full backup is duplicated to Site B.
|
A full synthetic backup is produced at Site B from images at
Site B.
The full synthetic backup at the remote site is a second copy of
the synthetic backup at the local site.
|
|
8
|
Steps 2 through 7 repeat per backup scheduling needs.
|
Step 8 remains the same.
|
