Maximizing Efficiency Through Data Replication Manager Data Movement Application Notes

Data Backup
8 Application Notes - Maximizing Efficiency Through Data Replication Manager Data Movement
Figure 4: Snapshot unit
Figure 5: Enterprise Backup Solution logical configuration example
Server
Source Unit
Write
new data
Controller cache
bitmap check
Snapshot unitSource unit
Write
old data
Before Snapshot created
and after Snapshot deleted
Write operations to a Source Unit
that has a Snapshot
Read operations to Snapshot Unit
Server
0 to 1
Read Read
Read
Controller cache
bitmap check
Snapshot unitSource unit
Server
01
0 = Data on Source Unit at time of Snapshot is unchanged
1 = Data on Source Unit at time of Snapshot transferred to
Snapshot Unit
CXO7300A
Host A
Initiator Target
HSG80
Controller A
Tape
A*
*Backup of non-DRM volumes only
RCS
Host B
HSG80
Controller B
Tape
B
CXO7688A
I/O I/O