| Measurement |
Description |
Measurement
Unit |
Interpretation |
| IO_Rate |
Indicates the number of read/write commands executed on this LUN per second.
|
IOPS |
If this measure reports a high value or if the value of the measure increases consistently, it is indicative of unusually high I/O activity on this LUN. Comparing the value of this measure across LUNs can accurately indicate which LUN is currently experiencing heavy workloads. Observing the variations in this measure over a period of time will enable you to figure out bottlenecks in load balancing.
|
| Read_Rate |
Indicates the number of read operations performed on this LUN per second.
|
IOPS |
|
| Write_Rate |
Indicates the number of write commands issued on this LUN per second.
|
IOPS |
|
| Read_Hit |
Indicates the percentage of read requests that were served from this LUN.
|
% |
Ideally, the value of this measure should be high. A low value is a cause for concern, as it could indicate that a majority of the read requests have failed. .
|
| Write_Hit |
Indicates the percentage of data written to this LUN.
|
% |
Ideally, the value of this measure should be high. A low value is a cause for concern, as it indicates that data is not getting written to the LUN; this could be owing to an I/O bottleneck, which might have to be investigated.
|
| Trans_Rate |
Indicates the transfer size of read/write commands per second.
|
KB/sec |
|
| Read_Trans_Rate |
Indicates the transfer size of read commands per second.
|
KB/sec |
|
| Write_Trans_Rate |
Indicates the transfer size of write commands per second.
|
KB/sec |
|
| Tag_Count |
Indicates this LUN's current tag count.
|
Number |
|