Users Guide
Table 12. MPIO Optional Parameters
Parameter Abbr. Argument Description
--max-sessions-per-volume-slice maxvols 1-4 Specifies the maximum number of connections for
MPIO to use per volume per member.
--max-sessions-per-entire-volume maxvole 1-12 Specifies the maximum number of connections for
MPIO to use per volume for all members.
--default-load-balancing dlb LQD or RR Specifies the default load balancing policy for MPIO as
Least Queue Depth (LQD) or Round Robin (RR).
--io-per-path ios 1 - 1000 Specifies the number of I/Os to send down each path
to a member before the dm-multipath target
switches to another path. Larger values provide better
throughput on sequential I/O workloads. The default is
16.
--min-adapter-speed minsp 100 or 1000 or 10000 Specifies the minimum speed of the NICs MPIO should
use, if at least two meet the speed.
--use-mpio-snapshots msnap Yes or No Specifies whether to use MPIO for snapshots.
--useip or --useip6 ip or ip6 none Specifies that MPIO will use IPv4 or IPv6 addresses.
Only one parameter can be specified.
Examples: Setting MPIO Parameters
This section includes examples of using the rswcli command to set parameters.
Example 1: Setting maxvols, maxvole, dlb, and Internet Protocol
In the following example, the command syntax includes the maximum number of connections that MPIO should use per volume (--
maxvols), maximum sessions per entire volume (--maxvole), the default load balancing mechanism (--dlb), and Internet Protocol
(--ip6):
# rswcli -P --maxvols 3 --maxvole 12 --dlb RR --ip6
Processing mpio-parameters command...
MPIO Parameters:
Max sessions per volume slice: 3
Max sessions per entire volume: 12
Minimum adapter speed: 1000
Default load balancing policy configuration: Round Robin (RR)
IOs Per Path: 16
Use MPIO for snapshots: Yes
Internet Protocol: IPv6
The mpio-parameters command succeeded.
Example 2: Setting I/Os Per Path
The following example shows output after setting the I/Os per path from 16 to 8:
# rswcli --mpio-parameters --io-per-path 8
Processing mpio-parameters command...
MPIO Parameters:
Max sessions per volume slice: 2
Max sessions per entire volume: 6
Minimum adapter speed: 100
Default load balancing policy configuration: Round Robin (RR)
IOs Per Path: 8
Use MPIO for snapshots: Yes
Internet Protocol: IPv4
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Configuring Multipath I/O Devices