Understanding Data Replication
Replication
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The ETERNUS CS800 can perform the following types of replication:
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"Directory/File or Cartridge Based Replication"
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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.
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CAUTION!
A saved snapshot is necessary to recover your data at a later time. For this reason,
it is not enough to simply enable replication for a share or partition. You must also
configure a replication schedule (recommended) or perform manual replication on
a regular basis to send snapshots of the share or partition to the target system.
If the source system ever becomes unavailable, you can recover the share or partition on
the target system using a saved snapshot. After you recover a share or partition, it is
recreated on the target system and is available for use. Once the source system becomes
available again, you can perform a failback operation to restore the share or partition to its
original location.
Directory/File or Cartridge Based Replication
Like replication, Directory/File or Cartridge Based Replication sends data from a NAS share
or VTL partition to another system where it can be accessed. However, Directory/File or
Cartridge Based Replication differs in a number of important ways:
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Both replication and Directory/File or Cartridge Based Replication must be enabled for
the share or partition.
Summary of Contents for ETERNUS CS800 S5
Page 1: ...Edition June 2014 English ETERNUS CS800 S5 V2 3 1 User Guide ...
Page 14: ...Contents U41840 J Z125 7 76 ...
Page 30: ...Environmental Protection Important Information 28 U41840 J Z125 7 76 ...
Page 48: ...Network Configuration System Description 46 U41840 J Z125 7 76 ...
Page 80: ...Locating the Serial Number Hardware Description and Basic Operations 78 U41840 J Z125 7 76 ...
Page 116: ...Further Configurations Installing the ETERNUS CS800 S5 Modules 102 U41840 J Z125 7 76 ...
Page 150: ...The Remote Management Console Remote Management 136 U41840 J Z125 7 76 ...
Page 190: ...AIS Connect Configuration Wizards 176 U41840 J Z125 7 76 ...
Page 200: ...Current Activity Overview Home Page 186 U41840 J Z125 7 76 ...
Page 301: ...Configuration System U41840 J Z125 7 76 287 Figure 177 Network Configuration ...
Page 353: ...Configuration Contacts U41840 J Z125 7 76 339 Figure 211 Primary and Secondary Pages ...
Page 402: ...Reports Replication 388 U41840 J Z125 7 76 ...
Page 406: ...Hardware Status 392 U41840 J Z125 7 76 Figure 236 System Board Page ...
Page 432: ...Activity Log Status 418 U41840 J Z125 7 76 ...
Page 442: ...Service Tickets Alerts 428 U41840 J Z125 7 76 ...
Page 462: ...Reboot Shutdown Utilities 448 U41840 J Z125 7 76 ...
Page 470: ...Common Problems and Solutions Troubleshooting 456 U41840 J Z125 7 76 ...
Page 496: ...Additional Specifications for Scale Mode System Specifications S5 626 U41840 J Z125 7 76 ...
Page 634: ...Index 634 U41840 J Z125 7 76 ...