NEC Storage ReplicationControl SQL Option, User Manual

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Chapter 1 Data Replication Overview
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Chapter 1 Data Replication Overview
To centrally manage the enormous amount of information accumulated by business operations and promote its
effective and efficient utilization, it is necessary to have a storage system that realizes a highly advanced
processing feature, large capacity memory and high reliability. The purpose of the data replication function is to
effectively operate this storage system.
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Data replication, which is a function that creates a Replication Volume (RV) for a Business Volume
(MV: Master Volume), is stored in the disk array. The RV can achieve synchronization and segregation
from the MV at an arbitrary time. When synchronized, the MV and RV coincide with each other in
terms of their contents; thus, update the MV is instantly reflected in the RV. Through segregation at an
arbitrary time, the MV data can be kept in the RV. By using this RV, backup and searches can be
performed in parallel with on-line services, thus making it possible to increase online operation time.
Figure 1-1 Data Replication
NEC Storage DynamicDataReplication
Synchronization /
Segregation operations
NEC Storage RemoteDataReplication
Master
Volume
(MV)
Replication
Volume
(RV)
Parallel processing
(Backup/Search)
Master operations
(Online)
Business Server
Master
Volume
(MV)
Replication
Volume
(RV)