Hitachi XP P9500 User Manual page 297

• for the Round Robin algorithm
rr
• for the Extended Round Robin algorithm
exrr
• for the Least I/Os algorithm
lio
•
for the Extended Least I/Os algorithm
exlio
•
for the Least Blocks. algorithm
lbk
•
for the Extended Least Blocks algorithm
exlbk
The type of algorithm specified by the
system, even if, you disable the load balancing function by specifying
decide to re-enable load balancing at a later time, and you do not specify an algorithm,
load balancing will still be executed by using the algorithm that was previously
specified.
(2) Setting Up Path Health Checking
You can choose whether you want to use path health checking.
The following is an example of using a command to enable path health checking.
# /opt/DynamicLinkManager/bin/dlnkmgr set -pchk on -intvl 10
To enable path health checking, specify
, you can use the
on
was specified previously will be applied if the checking interval is not specified. For
example, specify the path health check as
minutes and executing. Then, when executing after specifying the path health check
15
as without specifying the checking interval, the
on
previously will be applied again.
(3) Setting Up the Automatic Failback Function
When intermittent error monitoring is enabled and the number of error occurrences is
or more, the following condition must be satisfied.
2
error-monitoring-interval >= checking-interval-for-automatic-failbacks x
number-of-times-an-error-is-to-occur-during-intermittent-error-monitoring
If this condition is not satisfied, an error will occur and the warning message
KAPL01080-W will be output.
If this happens, change any of the following settings: the checking interval for
automatic failbacks, the intermittent error-monitoring interval, or the number of times
that the error needs to occur.
-lbtype
. Specify
on
parameter to specify the checking interval. The value that
-intvl
off
3. Creating an HDLM Environment
parameter remains stored in the
otherwise. When you specify
off
after specifying the checking interval as
minutes that were specified
15
. If you
-lb off
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