VSM 6.3 supports an Enhanced Replication feature that extends the replication capabilities of the VSM 6 product. With Enhanced Replication, synchronous replication begins replicating data to the target VTSS upon first host write to the VTV and provides host acknowledgment to the rewind unload operation once all data has been successfully replicated to the target VTSS.
A new replication facility, RLINKs, is used for Enhanced Replication. An RLINK is composed of all IP paths defined to the target VTSS. There is only one RLINK between the primary and target VTSS. With RLINKs, the number of replications is limited only to the number of virtual tape devices (VTDs) supported within the VTSS.
Note:
RLINK functionality cannot be used concurrently with synchronous CLINK replication.Enhanced Replication is initially available for use between two VSM 6 VTSSs, where each VTSS can be both a primary and a target for bi-directional synchronous VTV-level replication. Subsequent releases provide support for three-target synchronous replication and file-level synchronous replication.