Functionality Overview
Hitachi Universal Replicator represents a unique and outstanding disaster recovery solution for large amounts of data that span multiple volumes. The UR
UR enables you to create duplicate volumes by copying data from the primary data volumes in the primary storage system to the secondary data volumes in the secondary storage system at the remote location. To perform this function, the journal obtain function at the primary site, the journal copy function between the primary and secondary sites, and the journal restore function at the secondary site are performed sequentially with the primary and secondary data volumes and the journal volumes. Write sequence consistency for the primary data volume at the primary site is also maintained for the secondary data volume at the secondary site by the write sequence number to be assigned for the journal data with the journal obtaining function, enabling you to configure the duplicate system which has data integrity. UR reduces the occurrence of pair suspensions due to restrictions of data transfer from the primary site to the secondary site by storing the write data from the host in the master and restore journal volumes, providing a
Figure 2-1 UR Components for Fibre-Channel Connection shows an overview of UR operations.
Chapter 3 Preparing for Universal Replicator z/OS Operations |
