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From mpe...@apache.org
Subject kudu git commit: docs: 1.6 release notes for new data dir features
Date Thu, 30 Nov 2017 00:22:22 GMT
Repository: kudu
Updated Branches:
  refs/heads/master 336235cea -> 8929f1240


docs: 1.6 release notes for new data dir features

Change-Id: I611cb203ea61ee3936cec7622663fc054ae4d115
Reviewed-on: http://gerrit.cloudera.org:8080/8686
Reviewed-by: Mike Percy <mpercy@apache.org>
Tested-by: Mike Percy <mpercy@apache.org>


Project: http://git-wip-us.apache.org/repos/asf/kudu/repo
Commit: http://git-wip-us.apache.org/repos/asf/kudu/commit/8929f124
Tree: http://git-wip-us.apache.org/repos/asf/kudu/tree/8929f124
Diff: http://git-wip-us.apache.org/repos/asf/kudu/diff/8929f124

Branch: refs/heads/master
Commit: 8929f1240cb7dbdbb69455dd91fd74cbb7c2f4af
Parents: 336235c
Author: Andrew Wong <awong@cloudera.com>
Authored: Wed Nov 29 13:07:33 2017 -0800
Committer: Mike Percy <mpercy@apache.org>
Committed: Thu Nov 30 00:22:08 2017 +0000

----------------------------------------------------------------------
 docs/release_notes.adoc | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/kudu/blob/8929f124/docs/release_notes.adoc
----------------------------------------------------------------------
diff --git a/docs/release_notes.adoc b/docs/release_notes.adoc
index 0731611..acbd2c4 100644
--- a/docs/release_notes.adoc
+++ b/docs/release_notes.adoc
@@ -45,7 +45,23 @@
 [[rn_1.6.0_new_features]]
 == New features
 
-* TBD
+* Tablet servers' tolerance of disk failures is now enabled by default and has
+  been extended to handle data directory failures at runtime. In the event of
+  a disk failure at runtime, any tablets with data on a failed disk will be
+  shut down and restarted on another tablet server. There is a configurable
+  tradeoff between a newly added tablet's tolerance to disk failures and its
+  ability to parallelize reads via the experimental
+  `--fs_target_data_dirs_per_tablet` flag. Tablets that are spread across fewer
+  disks are less likely to be affected by a disk failure, at the cost of
+  reduced parallelism. By default, tablets are striped across all available
+  disks. Note that the first configured data directory and the WAL directory
+  cannot currently tolerate disk failures. This will be further improved in
+  future Kudu releases.
+
+* Kudu servers can now adopt new data directories via the new
+  `kudu fs update_dirs` tool. The new directory will be used by new tablet
+  replicas only. Note that removing directories is not yet supported
+  (see link:https://issues.apache.org/jira/browse/KUDU-2202[KUDU-2202]).
 
 == Optimizations and improvements
 


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