A.3 Notes On The Iostat Command - Hitachi XP P9500 User Manual

commands show little difference before and after HDLM installation.
Table A-1: Examples of Linux Command Execution Times
Linux
commands
Before HDLM
lvmdiskscan 6.1 sec
pvscan 2.6 sec
# 1
CPU: Pentium III 1.4 GHz x 2
Memory: 1 GB
Connection between host and storage systems: 64 LU x 2 paths (total 128 paths)
# 2
CPU: Xeon 2.0GHz x 2
Memory: 2 GB
Connection between host and storage systems: 64 LU x 2 paths (total 128 paths)

A.3 Notes on the iostat Command

If an HDLM device is not specified for the
not be displayed. Information about an HDLM device is displayed only when the
HDLM device is specified for the
dev/sddlmaa
device is always
conforms to the HDLM device.
If you are going to obtain information about an HDLM device, perform calculations
by using the value of a SCSI device that conforms to the HDLM device. The following
is an example of executing the
#1
Example 1
After HDLM
installation installation
19.6 sec
12.6 sec
iostat
). The information (CPU or I/O statistics) displayed for the HDLM
, and the actual value is displayed for each SCSI device that
0
iostat
A. Notes on Linux Commands and Files
Time
Example 2
Before HDLM
installation
3.8 sec
1.5 sec
command, the HDLM device will
iostat
command (in such case as
command.
#2
After HDLM
installation
10.6 sec
5.2 sec
iostat -x /
693