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161Administering dynamic multipathing (DMP)
Administering DMP using vxdmpadm
The interval attribute must be specified for this policy. The default
number of cycles between running the check_all policy is 10.
The interval attribute specifies how often the path restoration thread examines
the paths. For example, after stopping the path restoration thread, the polling
interval can be set to 400 seconds using the following command:
# vxdmpadm start restore interval=400
Note: The default interval is 300 seconds. Decreasing this interval can adversely
affect system performance.
To change the interval or policy, first stop the path restoration thread as
described in “Stopping the DMP path restoration thread” on page 161, and then
restart it with new attributes.
See the vxdmpadm(1M) manual page for more information about DMP restore
policies.
Stopping the DMP path restoration thread
Use the following command to stop the DMP path restoration thread:
# vxdmpadm stop restore
Note: Automatic path failback stops if the path restoration thread is stopped.
Displaying the status of the DMP path restoration thread
Use the following command to display the status of the automatic path
restoration kernel thread, its polling interval, and the policy that it uses to check
the condition of paths:
# vxdmpadm stat restored
This produces output such as the following:
The number of daemons running : 1
The interval of daemon: 300
The policy of daemon: check_disabled