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Live Volume overview
42 Dell EMC SC Series: Synchronous Replication and Live Volume | CML1064
5.5 Replication and Live Volume attributes
Once a Live Volume is created, additional attributes can be viewed and modified in Unisphere Central for SC
Series as depicted in Figure 40.
Live Volume settings
5.5.1 Replication
Live Volume is built on standard SC Series storage replicated volumes in which each replicated volume can
individually be configured as asynchronous, synchronous high availability, or synchronous high consistency.
Note that Live Volume automatic failover requires synchronous high availability mode. More information about
these attributes can be found throughout this document and in the Dell Storage Manager Administrator’s
Guide.
Type: This refers to asynchronous or synchronous replication.
Sync Mode: If the replication type is synchronous, Sync Mode describes the mode of synchronous replication
that may be either high consistency or high availability. Sync Mode is not displayed for asynchronous Live
Volumes.
Sync Status: If the replication type is synchronous, Sync Status describes the current state of the
synchronous replication as Current or Out Of Date. When Sync Status is Current, synchronous replication is
in sync. This means that both the source and destination volumes are consistent and the cumulative latency
to the secondary Live Volume will be observed at the primary Live Volume application. An out-of-date status
indicates that the data on the source and destination volumes is not consistent. Changed or inconsistent data
is tracked in a journal where the primary Live Volume resides until the two volumes are once again Current.
Sync Status is not displayed for asynchronous Live Volumes.
Deduplication: The Deduplication feature replicates only the changed portions of the snapshot history on the
source volume, rather than all data captured in each snapshot. While this is a more processor-intensive
activity, it may reduce the amount of replication traffic and bandwidth required. If sufficient bandwidth is