Chapter 6: Replication
Replication
Quantum DXi4700 User’s Guide 123
Additional Information
l Quantum recommends that you configure and start replication before storing large amounts of data on
the DXi.
l To schedule replication for a share or partition, use the Configuration > Scheduler page (see
Scheduling a Share or Partition for Replication on page 269). To limit the amount of network
bandwidth used for replication, enable a constant throttle (see Enabling System Throttling on
page 259), or schedule replication throttling (see Scheduling Replication Throttling on page 269).
l A DXi4700 can only replicate data to a DXi that supports the same protocol as the DXi4700 (NAS or
VTL). That is, a DXi4700 NAS system can only replicate data to a DXi that supports NAS. Similarly, a
DXi4700 VTL system can only replicate data to a DXi that supports VTL.
Best Practices Guides
The following DXi Best Practices Guides are available at www.quantum.com/DXi4700BPG:
l Backup Exec from Veritas
l Data Protector from HP
l Data Protection Manager from Microsoft
l NetBackup from Veritas
l NetWorker from EMC
l Simpana from CommVault
l Tivoli Storage Manager from IBM
l Veeam Backup and Replication
Understanding Data Replication
During data replication, data is sent from one system (the source) to another system, usually in another
location (the target). For example, you might replicate data from a branch office (the source) to a central
office (the target).
Sources send replicated data, and targets receive replicated data. A target system can receive data from up
to ten sources. A source system can send data to up to two targets. Finally, one system can act as both a
source and a target.
Replication works only with deduplicated data, and data is compressed before it is replicated. Because of
this, the amount of data transmitted between systems during replication is greatly reduced compared to the
original amount of data stored. In addition, a data block is transmitted only if the target does not already have
a copy of the block. Finally, data can optionally be encrypted before it is transmitted.
The DXi can perform the following types of replication:
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