- Notes, cautions, and warnings
- Preface
- Introduction
- Disaster recovery
- High availability
- Data migration
- SRDF I/O operations
- SRDF write operations
- SRDF read operations
- SRDF/A resilience and performance features
- Management tools
- More information
SRDF/A group pacing adjusts the pace of host writes to match the SRDF/A session’s link transfer rate. When host I/O rates spike, or slowdowns make transmit or apply cycle times longer, group pacing extends the host write I/O response time to match slower SRDF/A service rates.
When DSE is activated for an SRDF/A session, host-issued write I/Os are paced so their rate does not exceed the rate at which DSE can offload the SRDF/A session’s cycle data to the DSE Storage Resource Pool.
Group pacing behavior varies depending on whether the maximum pacing delay is specified:
Group pacing balances the incoming host I/O rates with the SRDF link bandwidth and throughput capabilities when:
Group pacing can be activated by configurations or activities that result in slow R2 operations, such as: