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Posted to commits@accumulo.apache.org by el...@apache.org on 2013/12/03 17:46:26 UTC
git commit: ACCUMULO-1946 Note in the README about
dfs.datanode.synconclose,
with a slight amendment to hadoop version application.
Updated Branches:
refs/heads/1.4.5-SNAPSHOT 1b3d071a8 -> 47403ba4f
ACCUMULO-1946 Note in the README about dfs.datanode.synconclose, with a slight amendment to hadoop version application.
Project: http://git-wip-us.apache.org/repos/asf/accumulo/repo
Commit: http://git-wip-us.apache.org/repos/asf/accumulo/commit/47403ba4
Tree: http://git-wip-us.apache.org/repos/asf/accumulo/tree/47403ba4
Diff: http://git-wip-us.apache.org/repos/asf/accumulo/diff/47403ba4
Branch: refs/heads/1.4.5-SNAPSHOT
Commit: 47403ba4f5d552cabb94bc710e050dc114bcc922
Parents: 1b3d071
Author: Josh Elser <el...@apache.org>
Authored: Mon Dec 2 12:43:58 2013 -0500
Committer: Josh Elser <el...@apache.org>
Committed: Tue Dec 3 11:41:36 2013 -0500
----------------------------------------------------------------------
README | 5 +++++
1 file changed, 5 insertions(+)
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http://git-wip-us.apache.org/repos/asf/accumulo/blob/47403ba4/README
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diff --git a/README b/README
index 878bbe3..bc469fc 100644
--- a/README
+++ b/README
@@ -73,6 +73,11 @@ You will need to have hadoop installed and configured on your system.
Accumulo 1.4.5-SNAPSHOT has been tested with hadoop version 0.20.2 and
0.20.203.0.
+Additionally, it is strongly recommended that you enable 'dfs.datanode.synconclose'
+(only available in Apache Hadoop >=1.1.1 or >=0.23) in your hdfs-site.xml configuration
+file to ensure that, in the face of unexpected power loss to a datanode, files are
+wholly synced to disk.
+
The example accumulo configuration files are placed in directories based on the
memory footprint for the accumulo processes. If you are using native libraries
for you tablet server in-memory map, then you can use the files in "native-standalone".