Hitachi Dynamic Link Manager Software Users Guide for Linux

• For a new installation, the installer uses the default values of the keys
that are listed in the following Table 7-12 Keys in the
[ENVIRONMENT_SETTINGS] Section on page 7-47 .
• For an upgrade installation or re-installation, the installer uses the old
HDLM setting values.
The following table lists and describes the keys defined in the
[ENVIRONMENT_SETTINGS] section.
Table 7-12 Keys in the [ENVIRONMENT_SETTINGS] Section
Key name
#1
Description
#2
Necessity of
definition
Maxim
um
numbe
r of
charac
ters
New
installa
tion
Upgrad
e
installa
tion or
re-
installa
tion
load_balance
Specify one of the following values
to indicate whether to enable or
disable the load balancing function:
on: Enabled (default)
off: Disabled
Optional Optional 3
load_balance_type
Specify one of the following values
to indicate the load balancing
algorithm:
rr: The Round Robin algorithm
exrr: The Extended Round Robin
algorithm
lio: The Least I/Os algorithm
exlio: The Extended Least I/Os
algorithm (default)
lbk: The Least Blocks algorithm
exlbk: The Extended Least Blocks
algorithm
Optional Optional 5
load_balance_same_
path_use_times
Specify the number of times the
same path can be used for I/O
operations when the Round Robin
(rr), Least I/Os (lio), or Least
Blocks (lbk) algorithm is used for
load balancing.
You can specify a value from 0 to
999999. The default is 32.
Optional Optional 6
lbex_usetimes_limi
t
Specify the number of times the
same path can be used for
sequential I/O operations when the
extended Round Robin (exrr),
Optional Optional 6
Utility Reference
7-47
Hitachi Dynamic Link Manager (for Linux®) User Guide