| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Number_of_connections |
Indicates the number of iSCSI connections currently made from initiators to this storage device.
|
Number |
An initiator is a client of an SCSI interface, via IP, that issues commands to request services from components, logical units of a server known as a target. A SCSI transport maps the client-server SCSI protocol to a specific interconnect. An initiator is one endpoint of a SCSI transport and a target is the other endpoint.
The value of this measure is a good indicator of the connection load on the storage device.
|
| Read_latency |
Indicates the time taken for a read operation on the storage device during the last measurement period.
|
Secs |
Very high values for these measures are indicative of the existence of road-blocks to rapid reading/writing by the storage device. By observing the variations in these measures over time, you can understand whether the latencies are sporadic or consistent. Consistent delays in reading/writing could indicate that there are persistent bottlenecks (if any) in the storage device to speedy I/O processing.
|
| Write_latency |
Indicates the time taken for a write operation on the storage device during the last measurement period.
|
Secs |
| Read_avg_latency |
Indicates the average time taken by this storage device to perform reads, since storage device startup.
|
Secs |
| Write_avg_latency |
Indicates the average time taken by this storage device to perform writes, since device startup.
|
Secs |
| Read_operation_count |
Indicates the rate at which the storage device performed reads.
|
Ops/Sec |
|
| Write_operation_count |
Indicates the rate at which the storage device performed writes. |
Ops/Sec |
|
| Transmitted_data |
Indicates the rate at which data is transmitted by the storage device. |
KB/Sec |
|
| Received_data |
Indicates the rate at which data is received by the storage device.
|
KB/Sec |
|