release notes: update_dirs and fs_metadata_dir This patch adds release notes for support of data dir removal via the `kudu fs update_dirs` tool and for the configuration of the metadata directory.
Note: These blurbs are taken from the configuration docs. Change-Id: I87f0857c3e7d9d98865fbb50e5e69b78e03c6fe2 Reviewed-on: http://gerrit.cloudera.org:8080/9581 Reviewed-by: Adar Dembo <a...@cloudera.com> Reviewed-by: Alexey Serbin <aser...@cloudera.com> Tested-by: Andrew Wong <aw...@cloudera.com> Project: http://git-wip-us.apache.org/repos/asf/kudu/repo Commit: http://git-wip-us.apache.org/repos/asf/kudu/commit/cda07be9 Tree: http://git-wip-us.apache.org/repos/asf/kudu/tree/cda07be9 Diff: http://git-wip-us.apache.org/repos/asf/kudu/diff/cda07be9 Branch: refs/heads/master Commit: cda07be91bdb9ea537dc19768db54fd345ce7bf0 Parents: 06704ec Author: Andrew Wong <aw...@cloudera.com> Authored: Mon Mar 12 11:18:57 2018 -0700 Committer: Andrew Wong <aw...@cloudera.com> Committed: Mon Mar 12 23:40:48 2018 +0000 ---------------------------------------------------------------------- docs/release_notes.adoc | 14 ++++++++++++++ 1 file changed, 14 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/kudu/blob/cda07be9/docs/release_notes.adoc ---------------------------------------------------------------------- diff --git a/docs/release_notes.adoc b/docs/release_notes.adoc index c965829..445ae33 100644 --- a/docs/release_notes.adoc +++ b/docs/release_notes.adoc @@ -50,6 +50,20 @@ [[rn_1.7.0_new_features]] == New features +* The `kudu fs update_dirs` tool now supports removing directories. Unless the + `--force` flag is specified, Kudu will not allow the removal of a directory + across which tablets are configured to spread data. If specified, all tablet + replicas configured to use that directory will fail upon starting up and be + replicated elsewhere, provided a majority exists elsewhere. + +* Users can use the new `--fs_metadata_dir` to specify the directory in which + to place tablet-specific metadata. It is recommended, although not + necessary, that this be placed on a high-performance drive with high + bandwidth and low latency, e.g. a solid-state drive. If not specified, + metadata will be placed in the directory specified by `--fs_wal_dir`, or in + the directory specified by the first entry of `--fs_data_dirs` if metadata + already exists there from a pre-Kudu 1.7 deployment. Kudu will not + automatically move existing metadata based on this configuration. == Optimizations and improvements
