https://community.cloudera.com/t5/Archives-of-Support-Questions/Can-I-run-the-balancer-for-hdfs/m-p/78918#M82593 There will not be any operational problems such as crashes or errors when<BR />running a HDFS balancer on a cluster with HBase running, but there can<BR />potentially be a performance impact depending on what the balancer decides<BR />to move based on its space thresholds.<BR /><BR />The performance impact would come from loss of locality - the<BR />RegionServers' required HFiles may find their blocks to be remote, so a<BR />slightly higher network usage can be observed until the next major<BR />compaction rewrites a block replica locally.<BR /><BR />If you'd like to narrow down the time-frame of impact, you can run the HDFS<BR />balancer with the desired balancing threshold, and then once it is<BR />complete, immediately follow up with a major compaction command on your<BR />latency-sensitive HBase tables. Fri, 24 Aug 2018 02:38:55 GMT Harsh J 2018-08-24T02:38:55Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Can-I-run-the-balancer-for-hdfs/m-p/78914#M82592 <P>I use cloudera cdh 4.0.4.</P><P>I run balancing on Hbase.</P><P>However, I have 10 data nodes, and only 5 servers are being used as hbase region servers.</P><P>Data node imbalance has occurred.</P><P>Is there a possibility that Hbase will cause problems when balancing with Hadoop hdfs?</P> Fri, 16 Sep 2022 13:37:17 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Can-I-run-the-balancer-for-hdfs/m-p/78914#M82592 avengers 2022-09-16T13:37:17Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Can-I-run-the-balancer-for-hdfs/m-p/78918#M82593 There will not be any operational problems such as crashes or errors when<BR />running a HDFS balancer on a cluster with HBase running, but there can<BR />potentially be a performance impact depending on what the balancer decides<BR />to move based on its space thresholds.<BR /><BR />The performance impact would come from loss of locality - the<BR />RegionServers' required HFiles may find their blocks to be remote, so a<BR />slightly higher network usage can be observed until the next major<BR />compaction rewrites a block replica locally.<BR /><BR />If you'd like to narrow down the time-frame of impact, you can run the HDFS<BR />balancer with the desired balancing threshold, and then once it is<BR />complete, immediately follow up with a major compaction command on your<BR />latency-sensitive HBase tables. Fri, 24 Aug 2018 02:38:55 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Can-I-run-the-balancer-for-hdfs/m-p/78918#M82593 Harsh J 2018-08-24T02:38:55Z