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From ha...@apache.org
Subject kudu git commit: [release notes]: RYW read mode
Date Tue, 13 Mar 2018 22:12:23 GMT
Repository: kudu
Updated Branches:
  refs/heads/branch-1.7.x 542cfd9e0 -> 00128aea1


[release notes]: RYW read mode

Change-Id: I9906398b0796307c26150f78e0e256e285ded516
Reviewed-on: http://gerrit.cloudera.org:8080/9594
Reviewed-by: Dan Burkert <danburkert@apache.org>
Reviewed-by: Grant Henke <granthenke@gmail.com>
Reviewed-by: David Ribeiro Alves <davidralves@gmail.com>
Tested-by: Kudu Jenkins
(cherry picked from commit 217715aae6eafdebb15fc33a103dea07e3bb37c1)
Reviewed-on: http://gerrit.cloudera.org:8080/9613
Reviewed-by: Hao Hao <hao.hao@cloudera.com>
Tested-by: Hao Hao <hao.hao@cloudera.com>


Project: http://git-wip-us.apache.org/repos/asf/kudu/repo
Commit: http://git-wip-us.apache.org/repos/asf/kudu/commit/00128aea
Tree: http://git-wip-us.apache.org/repos/asf/kudu/tree/00128aea
Diff: http://git-wip-us.apache.org/repos/asf/kudu/diff/00128aea

Branch: refs/heads/branch-1.7.x
Commit: 00128aea1ebcafd9095c02e5edf5238aa0025f90
Parents: 542cfd9
Author: hahao <hao.hao@cloudera.com>
Authored: Mon Mar 12 17:17:06 2018 -0700
Committer: Hao Hao <hao.hao@cloudera.com>
Committed: Tue Mar 13 22:12:07 2018 +0000

----------------------------------------------------------------------
 docs/release_notes.adoc | 9 +++++++++
 1 file changed, 9 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/kudu/blob/00128aea/docs/release_notes.adoc
----------------------------------------------------------------------
diff --git a/docs/release_notes.adoc b/docs/release_notes.adoc
index 482dc83..740c64d 100644
--- a/docs/release_notes.adoc
+++ b/docs/release_notes.adoc
@@ -74,6 +74,15 @@
   already exists there from a pre-Kudu 1.7 deployment. Kudu will not
   automatically move existing metadata based on this configuration.
 
+* Kudu 1.7 introduces a new scan read mode READ_YOUR_WRITES. Users can specify
+  READ_YOUR_WRITES when creating a new scanner in both C++ and Java clients.
+  If this mode is used, the client will perform a read such that it follows all
+  previously known writes and reads from this client. Reads in this mode ensure
+  read-your-writes and read-your-reads session guarantees, while minimizing
+  latency caused by waiting for outstanding write transactions to complete.
+  Note that this is still an experimental feature which may be stabilized in
+  future releases.
+
 == Optimizations and improvements
 * Reporting for the `kudu cluster ksck` tool has been updated so tablets and
   tables with on-going tablet copies are shown as "recovering". Additional


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