Set Raid-Tuning - Fujitsu Eternus DX100 S3 User Manual

Chapter 6 Information Settings and Display
6.1 Performance > set raid-tuning

set raid-tuning

This command the performance tuning parameters for the specified RAID group. For normal operations, the
performance tuning parameters do not need to be changed.
■ Syntax
set raid-tuning {-rg-number
[-dcmf {1|2|3|4|5|6|7|8|9|10}] [-rebuild-priority {low|middle|high}]
[-drive-access-priority {response|throughput}] [-disk-tuning {enable|disable}]
[-throttle {10|20|30|40|50|60|70|80|90|100}] [-ordered-cut {
■
Parameter
-rg-number
or
-rg-name
-dcmf
-rebuild-priority
-drive-access-priority
rg_numbers
This parameter specifies the RAID group identifiers whose tuning parameters are to be set up.
One or more parameters can be specified at the same time. For details, refer to
Group Syntax" (page 25).
rg_numbers
RAID group number
rg_names
RAID group name
Optional. This parameter specifies the value of Disk Command Multiplying Factor (DCMF).
DCMF is a coefficient that increases the limit on the number of outstanding disk commands.
Increasing the value of DCMF improves sequential write performance. The default value is one.
A DCMF value of two results in the limit on the number of outstanding commands by a factor of
two from the default.
1 – 10 Value of Disk Command Multiplying Factor (DCMF)
Optional. This parameter specifies the priority for Rebuild of the relevant RAID group. The same
priority is set to all of the RAID groups that are specified with the "-rg-number" parameter or
the "-rg-name" parameter.
low Low. Normal priority is given for rebuild, copyback, and redundant copy.
middle Middle. Rebuild, copyback, and redundant copy are given the same priority as
host access.
high High. Rebuild, copyback, and redundant copy are given priority over host access.
Optional. This parameter specifies the priority for accesses to the drives. The same priority is
set to all of the RAID groups that are specified with the "-rg-number" parameter or the "-rg-
name" parameter.
response Response priority mode
throughput Throughput priority mode
ETERNUS CLI User's Guide
Copyright 2014 FUJITSU LIMITED
rg_names
| -rg-name }
ordered_cut
666
}]
"1.2.9 RAID
P2X0-1210-05ENZ0