Repository: kudu Updated Branches: refs/heads/master 1eb82924a -> 66b06de7b
[docs] note on unavailable tservers during rebalancing Change-Id: Ifa7a7590a90cee2e2d1399655621ec3618e51b25 Reviewed-on: http://gerrit.cloudera.org:8080/11966 Reviewed-by: Will Berkeley <[email protected]> Tested-by: Alexey Serbin <[email protected]> Project: http://git-wip-us.apache.org/repos/asf/kudu/repo Commit: http://git-wip-us.apache.org/repos/asf/kudu/commit/27baa0c9 Tree: http://git-wip-us.apache.org/repos/asf/kudu/tree/27baa0c9 Diff: http://git-wip-us.apache.org/repos/asf/kudu/diff/27baa0c9 Branch: refs/heads/master Commit: 27baa0c99a4f4f075e2a9cc70323a358081e09e5 Parents: 1eb8292 Author: Alexey Serbin <[email protected]> Authored: Tue Nov 20 14:01:35 2018 -0800 Committer: Alexey Serbin <[email protected]> Committed: Tue Nov 20 23:59:44 2018 +0000 ---------------------------------------------------------------------- docs/administration.adoc | 8 ++++++++ 1 file changed, 8 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/kudu/blob/27baa0c9/docs/administration.adoc ---------------------------------------------------------------------- diff --git a/docs/administration.adoc b/docs/administration.adoc index ea27478..40690b2 100644 --- a/docs/administration.adoc +++ b/docs/administration.adoc @@ -1235,6 +1235,14 @@ the flag `--max_moves_per_server`. See `kudu cluster rebalance --help` for more. It's safe to stop the rebalancer tool at any time. When restarted, the rebalancer will continue rebalancing the cluster. +The rebalancer requires all registered tablet servers to be up and running +to proceed with the rebalancing process. That's to avoid possible conflicts +and races with the automatic re-replication and keep replica placement optimal +for current configuration of the cluster. If a tablet server becomes +unavailable during the rebalancing session, the rebalancer will exit. As noted +above, it's safe to restart the rebalancer after resolving the issue with +unavailable tablet servers. + The rebalancing tool can rebalance Kudu clusters running older versions as well, with some restrictions. Consult the following table for more information. In the table, "RF" stands for "replication factor".
