Set Policy Details for
Devices that Use Round RobinLast Updated December 19, 2024
hosts can
use multipathing for failover. With some storage devices,
hosts can
also use multipathing for load balancing.
To achieve better load
balancing across paths, administrators can specify that the
host
should switch paths under specific circumstances. Different options determine
when the
host
switches paths and what paths are chosen. Only a limited number of storage
arrays support round robin.
You can use
esxcli storage
nmp psp roundrobin
to retrieve and set round robin path options on a
device controlled by the
roundrobin PSP
. Specify one of the options listed in
Connection Options for vCLI Host Management Commands
in place of
<conn_options>
.
No
vicfg-
command exists for performing the operations. The ESXCLI commands for setting
round robin path options have changed. The commands supported in
4.x are no
longer supported.
- Retrieve path selection settings for a device that is using theroundrobin PSP.
- Set the path selection. You can specify when the path should change, and whether unoptimized paths should be included.
- Use--bytesor--iopsto specify when the path should change, as in the following examples. Sets the device specified by--deviceto switch to the next path each time 12345 bytes have been sent along the current path. Sets the device specified by--deviceto switch after 4200 I/O operations have been performed on a path.
- Useuseanoto specify that the round robin PSP should include paths in the active, unoptimized state in the round robin set (1) or that the PSP should use active, unoptimized paths only if no active optimized paths are available (0). If you do not include this option, the PSP includes only active optimized paths in the round robin path set.