|
Measures reported by IbmDsLdevPerfTest
The IbmDsLdevPerfTest reports the level of I/O and transaction traffic on each LUN so that, you can accurately isolate LUNs that are over-loaded.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Total_IO |
Indicates the number of I/O operations on this LUN during the last measurement period. |
Number |
|
| Prct_read |
Indicates the percentage of read operations on this LUN. |
Percent |
|
| Prct_write |
Indicates the percentage of write operations on this LUN. |
Percent |
|
| Cache_hit_prct |
Indicates the percentage of requests served from the cache by this LUN. |
Percent |
A high value is ideally desired for this measure. A low value could imply that most of the data requested is not in the cache, which in turn could result in a high degree of direct disk accesses. |
| Trans_rate |
Indicates the rate of transactions to this LUN. |
KB/Sec |
|
| Current_IOPS |
Indicates the rate of I/O operations to this LUN. |
IO/Sec |
|
|