Incoming writes to a data volume on the Primary are written to the SRL first, and then to the data volume. VVR manages writes in the same way, irrespective of the replication settings, including the mode of replication. Note that writes to different data volumes within the RVG are all written in the same SRL. Therefore, the SRL throughput may affect performance. The use of the SRL may not degrade performance too badly, for the following reasons:

• The writes to SRL are sequential, whereas, the writes to the data volumes are spatially random in most cases. Typically, sequential writes are processed faster than the random writes.

• The SRL is not used to process read operations performed by the application. If a large percentage of the operations are read operations, then the SRL is not busy at these times.