question Re: Datanode Balancer bandwidth configuration in Support Questions

Datanode Balancer bandwidth configuration

snm1523 — Tue, 21 Apr 2026 06:24:39 GMT

Hello,

Trying to configure Datanode balancer network bandwidth to 4 GB since we have a good 25 GBPS network dedicated to the cluster. However, when set via Cloudera Manager, I get an alert stating max allowed in 1 GB.

Is it something hard coded and cannot be increased beyond 1 GB via CM? OR there is a different way to do that?

Thanks
snm1523

Re: Datanode Balancer bandwidth configuration

shubham_sharma — Tue, 22 Oct 2024 12:23:25 GMT

Hi @snm1523

It is a CM restriction to change the dfs.datanode.balance.bandwidthPerSec more than 1 GB but can be achieved from CLI

Example -

nohup hdfs balancer -Ddfs.datanode.balance.bandwidthPerSec=4294967296 > /tmp/balance_log.out &

Re: Datanode Balancer bandwidth configuration

snm1523 — Wed, 23 Oct 2024 14:58:36 GMT

Thank you for the help, Shubham.

Thanks
Snm1523