wwid | Specifies the WWID of the multipath device to which the multipath attributes apply. |
alias | Specifies the symbolic name for the multipath device to which the multipath attributes apply. |
path_grouping_policy | Specifies the default path grouping policy to apply to unspecified multipaths. Possible values include:
failover = 1 path per priority group | multibus = all valid paths in 1 priority group | group_by_serial = 1 priority group per detected serial number | group_by_prio = 1 priority group per path priority value | group_by_node_name = 1 priority group per target node name |
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path_selector | Specifies the default algorithm to use in determining what path to use for the next I/O operation. |
rr_min_io | (RHEL 4.8 and later) Specifies the number of I/O requests to route to a path before switching to the next path in the current path group. |
failback | Specifies path group failback.
A value of 0 or immediate specifies that as soon as there is a path group with a higher priority than the current path group the system switches to that path group. | | A numeric value greater than zero specifies deferred failback, expressed in seconds. | A value of manual specifies that failback can happen only with operator intervention. |
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rr_weight | If set to priorities, then instead of sending rr_min_io requests to a path before calling selector to choose the next path, the number of requests to send is determined by rr_min_io times the path's priority, as determined by the prio_callout program. Currently, there are priority callouts only for devices that use the group_by_prio path grouping policy, which means that all the paths in a path group will always have the same priority.
If set to uniform, all path weights are equal. |
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no_path_retry | A numeric value for this attribute specifies the number of times the system should attempt to use a failed path before disabling queueing.
A value of fail indicates immediate failure, without queueing. | A value of queue indicates that queuing should not stop until the path is fixed. |
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flush_on_last_del | (RHEL 4.7 and later) If set to yes, the multipathd daemon will disable queueing when the last path to a device has been deleted. The default value is no. |
mode | (RHEL 4.7 and later) The mode to use for the multipath device nodes, in octal. The default value is determined by the process. |
uid | (RHEL 4.7 and later) The user ID to use for the multipath device nodes. You must use the numeric user ID. The default value is determined by the process. |
gid | (RHEL 4.7 and later) The group ID to use for the multipath device nodes. You must use the numeric group ID. The default value is determined by the process. |
