[ https://issues.apache.org/jira/browse/HBASE-10939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Adela Maznikar reassigned HBASE-10939: -------------------------------------- Assignee: Adela Maznikar > [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 > Assignee: 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)