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Chapter 2 Data Replication
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This section describes the replication operations and state transitions.
The pair setting is specified
but MV and RV are separated.
separated
• MV and RV can be
updated.
MV
exec : Executing Replicate, Separate, or Restore
sync : Replicate or Restore synchronization state
rpl : replicate (Replicate)
rpl/exec ............. Executing synchronization
rpl/sync ............. Synchronization state
sep : separate (Separate)
sep/exec ............ Executing Separate
separated .......... Separate completion state
rst
: restore (Restore)
rst/exec ............. Executing Restore
rst/sync ............. Synchronization state
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Difference between MV and
RV is being reflected.
MV
Replicate
• RV cannot be updated.
rpl/exec
sep/exec
Separate
RV
• As a rule, RV cannot
be updated.
rst/exec
Restore
• RV cannot be updated.
MV
Figure 2-2 Replication Operations and State Transitions
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The pair setting is specified
and synchronization has been
established.
RV
• Updates to MV are reflected to RV.
• As a rule, access to RV is not
allowed.
MV
RV
• When Restore(protect) is executed,
Synchronous State (rst/sync) is
placed and then automatically
changed to Separated State
(separated).
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sync
rpl/sync
RV
rst/sync
• When Restore(update) is
executed, updates to MV are
reflected to RV.
• When Restore(protect) is
executed, updates to MV are not
reflected to RV.
• As a rule, access to RV is not
allowed.
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