![background image](http://html1.mh-extra.com/html/quantum/dxi8500/dxi8500_user-manual_3787717196.webp)
Chapter 6: DXi8500 Replication
Understanding Data Replication
166
Quantum DXi8500 User’s Guide
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 10 sources. However, a source
system can send data to only a single target. 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 DXi8500 can perform the following types of replication:
•
Replication
•
Directory/File or Cartridge Based Replication
•
OST Optimized Duplication
Replication
Replication occurs when replication is enabled for a deduplicated NAS
share or VTL partition and a replication schedule is configured (or
manual replication is performed on a regular basis). For replication to
occur, the source system must be configured to point to the target
system. Similarly, the target system must be configured to accept data
from the source system.
To optimize the replication process, deduplicated data is continuously
sent in the background from the source system to the target system.
However, a snapshot that preserves the file structure of your data is sent
to the target system only when a scheduled or manual replication job
occurs. A snapshot contains all of the information that is necessary to
recreate a share or partition just as it was at the point in time when the
snapshot was created.
Summary of Contents for DXi8500
Page 1: ...User s Guide Quantum DXi8500 with DXi 2 2 1 Software 6 67205 04 Rev B...
Page 30: ...Preface xxx Quantum DXi8500 User s Guide...
Page 182: ...Chapter 4 DXi8500 Configuration Wizards Support Wizard 152 Quantum DXi8500 User s Guide...
Page 194: ...Chapter 5 DXi8500 Home Page Current Activity Overview 164 Quantum DXi8500 User s Guide...
Page 251: ...Chapter 6 DXi8500 Replication Reports Quantum DXi8500 User s Guide 221...
Page 252: ...Chapter 6 DXi8500 Replication Reports 222 Quantum DXi8500 User s Guide...
Page 478: ...Chapter 10 DXi8500 Utilities Reboot Shutdown 448 Quantum DXi8500 User s Guide...
Page 508: ...Appendix B Troubleshooting Common Problems and Solutions 478 Quantum DXi8500 User s Guide...
Page 516: ...Appendix C Regulatory Statements 486 Quantum DXi8500 User s Guide Declaration of Conformity...