Adela Maznikar created HBASE-10939: -------------------------------------- Summary: [89-fb] Adding a rack in HBase in online fashion Key: HBASE-10939 URL: https://issues.apache.org/jira/browse/HBASE-10939 Project: HBase Issue Type: New Feature Components: Region Assignment Affects Versions: 0.89-fb Reporter: Adela Maznikar Fix For: 0.89-fb
RegionPlacement -exprack to add a new rack into the region placement. So far we have a static assignment plan and 3 preferred locations for a region, such that the primary is the location which is serving all requests and hdfs locality is very high on all 3 nodes. -exprack is moving the the third preferred location on the new rack such that it leaves the cluster in balanced state. After a few days locality is high enough and we make some of this new locations primaries such that again we have a balanced state in number of primaries per regionservers in the entire cluster. -- This message was sent by Atlassian JIRA (v6.2#6252)