DISK FILE report

This report contains information on the input/output operations on all files of selected disk devices.

Report output

The REPORT DISK_FILE statement is used to request the output of the DISK FILE report. The report can only be output if the SM2 administrator has

• defines the disk devices to be monitored using the SET-DISK-FILE-PARAMETERS statement

• started the monitoring process using the statement START-MEASUREMENT-PROGRAM TYPE=*DISK-FILE

The statistics for each disk devices are output in a separate screen. All files are displayed to the privileged user. Nonprivileged users only get to see files with their own ID.

Overflow screens can be requested for this report. The output of the monitored data is sorted on the basis of READ and WRITE.

 HOST0001 SM2 DISK FILE       CYCLE:   60 S                       <date> <time>

      READ  |  WRITE  |  FILENAME                     (MN: B3A3, VSN: 6VS1.1)
   ---------+---------+-------------------------------------------------------
        0.0 |     0.0 | *OVERRUNS
        0.4 |     4.3 | :2OS6:$UID.FILE1
        3.0 |     0.0 | :2OS6:$UID.FILE2
        1.1 |     1.6 | :2OS6:$UID.FILE3
        0.6 |     0.0 | :2OS6:$UID.FILE4

Monitoring information

READ	Number of read operations per second
WRITE	Number of write operations per second
FILENAME	Name of the monitored file The first row always contains the value *OVERRUNS. This entry includes all input/output operations that could not be assigned to a file entry because the internal SM2 table was full during the monitoring cycle. It is generally set to zero or to a low value. In the FILENAME column, not all names are in the format :<catid>:<$userid>.<filename>. In the case of special disk accesses (e.g. by DAB), this format is not applied.
MN	Mnemonic device name of the monitored disk device
VSN	VSN of the monitored disk device