Hp Hitachi Dynamic Link Manager Software Manual de usuario descargar pdf (Pagina 213)

100

101

3. Creating an HDLM Environment

191

• 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.

(2) 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.

(3) 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

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.

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