Monitoring copy operations and I/O statistics
You can monitor copy operations and I/O statistics to determine the replication performance.
For more information about monitoring performance, see the Performance Guide.
For the primary site in a 3DC multi-target configuration combining three UR sites, two or more mirrors are set in the primary system. The following table describes the data displayed in Logical Device (UR/URMF) and Journal (UR/URMF) for Performance Monitor in the primary storage system.
|
Object of monitoring1 |
Monitoring data |
Description |
|
Logical Device (UR/URMF) |
Initial copy cache hit (%) |
Average of all mirror’s cache hit rates in primary system. |
|
Initial copy data transfer (MB/s) |
Total of all mirror’s data transfer amount in primary system during initial copy. | |
|
Journal (UR/URMF) |
Master journal throughput (IOPS) |
Total throughput of all mirrors in the primary system. |
|
Master journal (count/sec) |
Total of all mirror’s journal responses in primary system. | |
|
Master journal data transfer (MB/s) |
Total of all mirror’s data transfer amount in primary system. | |
|
Master journal response time (ms) |
Average of all mirror’s response time in primary system. | |
|
Notes:
| ||
If the journal group attribute is Master/Restore, only the restore journal information is displayed in Journal (UR/URMF), as shown in the following table.
|
Object of monitoring |
Monitoring data |
Description |
|
Journal (UR/URMF) |
Restore journal throughput (IOPS) |
Restore journal throughput per second. |
|
Restore journal (count/sec) |
Number of count for restore journal per second. | |
|
Restore journal data transfer (MB/s) |
Restore journal data transfer amount. | |
|
Restore journal response time (ms) |
Restore journal response time. | |
|
Restore journal usage data (%) |
Restore journal usage data. | |
|
Restore journal metadata usage rate (%) |
Restore journal metadata usage rate. |