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YifanZhang edited comment on KUDU-2914 at 8/3/19 8:35 AM: ---------------------------------------------------------- Thanks for explanations, I agree that for maintenance rereplicating all replicas brings no benefits. Thus this issue is very similar to KUDU-1827, my idea is making improvements on rebalance tool to support batch migrating replicas from some specified tservers to the others. But maybe this way isn't graceful enough for we call 'move_replica' many times, see KUDU-2246, it could be more reliable in certain edge-case scenarios. was (Author: zhangyifan27): Thanks for explanations, I agree that for maintenance rereplicating all replicas brings no benefits. Thus this issue is similar to KUDU-1827. > Rebalance tool support moving replicas from some specific tablet servers > ------------------------------------------------------------------------ > > Key: KUDU-2914 > URL: https://issues.apache.org/jira/browse/KUDU-2914 > Project: Kudu > Issue Type: Improvement > Components: CLI > Reporter: YifanZhang > Priority: Minor > > When we need to stop/upgrade some tablet servers in a kudu cluster, these > tservers would become unavailable and tablets on these servers would be > unhealthy in a period of time. In order to ensure the high availability of > the cluster, it's better to move all replicas on these tservers to other > tservers in a cluster, then stop or upgrade tservers. This can be achieved by > rebalance tool to support specifying 'blacklist_tservers'. -- This message was sent by Atlassian JIRA (v7.6.14#76016)