Snap the secondary. Recover the secondary volumes, returning them to simplex. Snap the secondary volumes. Establish times for the RVA are especially fast when you have four links to the secondary RVA subsystem. Performance of the RVA at distances beyond 9 kilometers should be faster than for 3990 subsystems .
Data is sent with a minimum amount of overhead, and full tracks are transferred in one operation.
However, short data transfers over relatively short distances may exhibit negative comparable performance, as an entire track of data is transferred even for single, short record updates. It is unlikely that PPRC will overrun an RVA subsystem . Even when four links are busy transferring PPRC data, there are still four paths available for host operations. RVAs have eight internal paths that can all be moving data at once, as compared to the 3990's four internal paths.