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Posted to commits@kudu.apache.org by ha...@apache.org on 2018/03/13 22:10:58 UTC
kudu git commit: [release notes]: RYW read mode
Repository: kudu
Updated Branches:
refs/heads/master ce0db9157 -> 217715aae
[release notes]: RYW read mode
Change-Id: I9906398b0796307c26150f78e0e256e285ded516
Reviewed-on: http://gerrit.cloudera.org:8080/9594
Reviewed-by: Dan Burkert <da...@apache.org>
Reviewed-by: Grant Henke <gr...@gmail.com>
Reviewed-by: David Ribeiro Alves <da...@gmail.com>
Tested-by: Kudu Jenkins
Project: http://git-wip-us.apache.org/repos/asf/kudu/repo
Commit: http://git-wip-us.apache.org/repos/asf/kudu/commit/217715aa
Tree: http://git-wip-us.apache.org/repos/asf/kudu/tree/217715aa
Diff: http://git-wip-us.apache.org/repos/asf/kudu/diff/217715aa
Branch: refs/heads/master
Commit: 217715aae6eafdebb15fc33a103dea07e3bb37c1
Parents: ce0db91
Author: hahao <ha...@cloudera.com>
Authored: Mon Mar 12 17:17:06 2018 -0700
Committer: Hao Hao <ha...@cloudera.com>
Committed: Tue Mar 13 22:09:48 2018 +0000
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docs/release_notes.adoc | 9 +++++++++
1 file changed, 9 insertions(+)
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http://git-wip-us.apache.org/repos/asf/kudu/blob/217715aa/docs/release_notes.adoc
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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