docs: add warning to wait between FS rebuilds Customers who are rebuilding multiple Kudu nodes may permanently delete all healthy replicas for a tablet. This won't prevent data loss in the event that a only single copy remains and is deleted, but waiting should help prevent such situations.
Change-Id: I5659c2ba05a0a6b9905213c5df6ba0dcb371f312 Reviewed-on: http://gerrit.cloudera.org:8080/9279 Reviewed-by: Alex Rodoni <arod...@cloudera.com> Tested-by: Kudu Jenkins Reviewed-by: Todd Lipcon <t...@apache.org> Project: http://git-wip-us.apache.org/repos/asf/kudu/repo Commit: http://git-wip-us.apache.org/repos/asf/kudu/commit/9f93e97a Tree: http://git-wip-us.apache.org/repos/asf/kudu/tree/9f93e97a Diff: http://git-wip-us.apache.org/repos/asf/kudu/diff/9f93e97a Branch: refs/heads/master Commit: 9f93e97a676a93db33b8dc57e0f9d2be8147a189 Parents: 13fc066 Author: Andrew Wong <aw...@cloudera.com> Authored: Fri Feb 9 13:19:40 2018 -0800 Committer: Todd Lipcon <t...@apache.org> Committed: Tue Mar 6 22:44:08 2018 +0000 ---------------------------------------------------------------------- docs/administration.adoc | 5 +++++ 1 file changed, 5 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/kudu/blob/9f93e97a/docs/administration.adoc ---------------------------------------------------------------------- diff --git a/docs/administration.adoc b/docs/administration.adoc index 4d1afe8..ab78aa1 100644 --- a/docs/administration.adoc +++ b/docs/administration.adoc @@ -777,6 +777,11 @@ factor is at least three and all other servers are online and healthy. NOTE: These steps use a tablet server as an example, but the steps are the same for Kudu master servers. +WARNING: If multiple nodes need their FS layouts rebuilt, wait until all +replicas previously hosted on each node have finished automatically +re-replicating elsewhere before continuing. Failure to do so can result in +permanent data loss. + WARNING: Before proceeding, ensure the contents of the directories are backed up, either as a copy or in the form of other tablet replicas.
