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ISDM - 13 Remote Replication - Coggle Diagram
ISDM - 13
Remote Replication
To protect from regionally driven outages.
Storage Array Based
Synchronous
Replication
Near-zero RPO
Increased response time.
Depends on bandwidth & distance.
Bandwidth > max write workload
Less than 200 km
Commit to both host & target
before ack.
Asynchronous
Replication
write committed to source then acknowledged.
Data is buffered, then sent to target.
Finite RPO
(Minutes)
Depends on
Buffer Size
Network bandwidth
average write workload
Target behind --> size of source buffer
Long distances.
Disk Buffered
Larger RPO
Components
Source DB
Local Replica (Synchronous)
Remote Replica (Asynchronous)
Local Replica (Optional)
Host Based
Log Shipping
Common --> DB
LVM-based
Synchronous
Asynchronous
Network-based
Any point-in-time recovery
Continuous Data Protection
CDP Appliance
Source
Target
Write splitter
CDP Journal volume.
Support Synchronous & Asynchronous