Setting up path health checking -71 – HP Hitachi Dynamic Link Manager Software User Manual
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these conditions are applied regardless of whether or not the load balancing
function is enabled in those series. For example, in a cluster environment, the
load balancing function is disabled even if you try to enable it for the EMC
DMX series. For details on the cluster software supported by HDLM, see
•
Setting up load balancing by using the set operation
The following is an example of how to set up load balancing by using a
command:
>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
The type of algorithm specified by the -lbtype parameter remains stored
in the system, even if, you disable the load balancing function by
specifying -lb off. If you 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.
Setting Up Path Health Checking
You can choose whether you want to use path health checking.
•
Set up path health checking by using the set operation
The following is an example of how to set up path health checking by
using a command:
>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.
Creating an HDLM Environment
3-71
Hitachi Dynamic Link Manager User Guide (for Windows(R))