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PowerScale OneFS 9.5.0.0 CLI Administration Guide

Bandwidth and CPU throttling during data transfer

Bandwidth throttling enables you to control the amount of available bandwidth consumed by direct source-to-target communications over the course of a workload migration. Throttling helps to prevent migration traffic from congesting your production network and to reduce the overall load of your production server. You can set bandwidth throttling rules for each Datamover migration job.

Bandwidth throttling

Bandwidth throttling is configured through a set of netmask rules. Throttling is applied to the network segment by the required netmask type, which enables administrators to create multiple bandwidth rules for throttling Datamover-related traffic.

Administrators set the netmask and bandwidth limit at the time of the rule creation. Once a rule is created, administrators will only be able to modify bandwidth limits of the rule.

View and create bandwidth throttling rules by using the isi dm throttling commands. For example:
isi dm throttling settings view
isi dm throttling bw-rules create NETMASK --netmask <netmask>/16 --bw-limit=$((10*1024*1024))
isi dm throttling bw-rules list

CPU throttling

CPU throttling is configured through the "allowed CPU percentage" and "backoff CPU percentage." The "backoff CPU percentage" is the CPU threshold at which Datamover "backs off" if it is consuming more than the allowed CPU percentage.

See the OneFS CLI Reference Guide for additional isi dm throttling command options.


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