HP Hitachi Dynamic Link Manager Software Licenses - Manual (Page 208)

The following is an example command to set load-balancing:
# /opt/DynamicLinkManager/bin/dlnkmgr set -lb on -lbtype exlio
When load balancing is enabled by specifying on for the -lb parameter,
specify one of the following algorithm values after the -lbtype parameter:
• rr for the Round Robin algorithm
• exrr for the Extended Round Robin algorithm
• lio for the Least I/Os algorithm
• exlio for the Extended Least I/Os algorithm
• lbk for the Least Blocks algorithm
• exlbk for the Extended Least Blocks algorithm
When you set this value to on, specify rr for round robin or exrr for
extended round robin after the -lbtype option. The type of algorithm
specified by the -lbtype parameter remains stored in the system, even when
you disable the load balancing function by specifying -lb off. Therefore,
when you re-enable the load balancing function without specifying an
algorithm, load balancing will be executed according to the algorithm stored
in the system.
Setting Up Path Health Checking
You can choose whether you want to use path-health-checking function.
The following is an example of how to set up path health checking by using a
command:
# /opt/DynamicLinkManager/bin/dlnkmgr set -pchk on -intvl 10
When path health checking is enabled by specifying on for the -pchk
parameter, you can also specify the -intvl parameter, in order to specify the
checking interval. If the checking interval is not specified, then the previously
specified value will be automatically applied. For example, if you turn off path
health checking after the checking interval was specified as 15 minutes, and
then you enable path health checking again (but without specifying a
checking interval) the 15 value that was specified from before will be used
again.
Setting Up the Automatic Failback Function
When intermittent error monitoring is enabled and the number of error
occurrences is 2 or more, the following condition must be satisfied.
error-monitoring-interval >= checking-interval-for-automatic-
failbacks x number-of-times-an-error-is-to-occur-during-intermittent-
error-monitoring
3-142
Creating an HDLM Environment
Hitachi Dynamic Link Manager (for Solaris) User Guide