When you execute the dlmperfinfo utility, the following information is displayed.
Number of I/Os
I/O transfer amount
I/O response time
Number of I/Os and I/O blocks that are being processed
The following table provides details about the displayed information.
Item |
Description |
|---|---|
Paths |
Number of paths that were measured. If the -t parameter was specified, this item is not output. |
StartTime |
Time when performance measurement started. This item is output as many times as the value specified for the -c parameter. This item is displayed only in the console window. |
UTC |
Coordinated universal time. This item is output in YYYYMMDDThhmmss format. Example: 20170707T123000 If the -f parameter was specified, this item is output to the CSV file. |
Date |
Date (year, month, and date) when measurement started. This item is output in YYYYMMDD format. Example: 20170707 If the -f parameter was specified, this item is output to the CSV file. |
Time |
Time (hour, minute, second) when measurement started. This item is output in hhmmss format. If the -f parameter was specified, this item is output to the CSV file. |
LDEV |
Information about LDEVs. The model ID, serial number, and iLU number for the storage system, separated by periods. This item is always output. |
HDevName |
Host device name. The name of the logical device file (minus the partition number), /dev/sddlm[aa-pap], for the HDLM device. For details on logical device files for HDLM devices, see Logical device files for HDLM devices. This item is always output. |
Device |
Device file. SCSI device associated with an HDLM device. If the SCSI device is not connected when a host starts, or the assigned LU is released, this column displays a hyphen (-). This item is always output. |
PathID |
The AutoPATH_ID. This item is always output. |
PathName |
The path name. If the -a parameter was specified, this item is output. |
HBAPortWWN |
Port WWN information of the HBAs. If the -a parameter was specified, this item is output. |
ChaPort |
Port number of the CHA If the -a parameter was specified, this item is output. |
Status |
Status of the path. If the -a parameter was specified, this item is output. |
Count_R/s |
Number of read I/Os per second. Unit: number of I/Os This item is always output. |
Count_W/s |
Number of write I/Os per second. Unit: number of I/Os This item is always output. |
Count_R/s-Rnd |
Number of random read I/Os per second. Unit: number of I/Os If the -a parameter was specified, this item is output. |
Count_R/s-Seq |
Number of sequential read I/Os per second. Unit: number of I/Os If the -a parameter was specified, this item is output. |
Count_W/s-Rnd |
Number of random write I/Os per second. Unit: number of I/Os If the -a parameter was specified, this item is output. |
Count_W/s-Seq |
Number of sequential write I/Os per second. Unit: number of I/Os If the -a parameter was specified, this item is output. |
MB_R/s |
Amount of data handled by read I/Os per second. Unit: MB This item is always output. |
MB_W/s |
Amount of data handled by write I/Os per second. Unit: MB This item is always output. |
MB_R/s-Rnd |
Amount of data handled by random read I/Os per second. Unit: MB If the -a parameter was specified, this item is output. |
MB_R/s-Seq |
Amount of data handled by sequential read I/Os per second. Unit: MB If the -a parameter was specified, this item is output. |
MB_W/s-Rnd |
Amount of data handled by random write I/Os per second. Unit: MB If the -a parameter was specified, this item is output. |
MB_W/s-Seq |
Amount of data handled by sequential write I/Os per second. Unit: MB If the -a parameter was specified, this item is output. |
Time_R |
Average response time of read I/Os. Unit: Microsecond This item is always output. |
Time_W |
Average response time of write I/Os. Unit: Microsecond This item is always output. |
Time_R-Rnd |
Average response time of random read I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Time_R-Seq |
Average response time of sequential read I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Time_W-Rnd |
Average response time of random write I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Time_W-Seq |
Average response time of sequential write I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Max-Time_R |
Maximum response time of read I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Max-Time_W |
Maximum response time of write I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Max-Time_R-Rnd |
Maximum response time of random read I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Max-Time_R-Seq |
Maximum response time of sequential read I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Max-Time_W-Rnd |
Maximum response time of random write I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Max-Time_W-Seq |
Maximum response time of sequential write I/Os. Unit: Microsecond If the -a parameter was specified, this item is output. |
Count_Error |
Number of I/O errors. Unit: number of I/Os If the -a parameter was specified, this item is output. |
Time_Error |
Average response time of I/O errors. Unit: Microsecond If the -a parameter was specified, this item is output. |
QueuedIO |
Average number of I/Os being processed if a path was selected. Unit: number of I/Os If the -a parameter was specified, this item is output. |
QueuedMB |
Average amount of data handled by the I/Os being processed if a path was selected. Unit: MB If the -a parameter was specified, this item is output. |
Max-QueuedIO |
Maximum number of I/Os being processed if a path was selected. Unit: number of I/Os If the -a parameter was specified, this item is output. |
Max-QueuedMB |
Maximum amount of data handled by the I/Os being processed if a path was selected. Unit: MB If the -a parameter was specified, this item is output. |