Updated Branches: refs/heads/1.5.1-SNAPSHOT cd96f85e0 -> 747c7cdbd
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/1.5.1-SNAPSHOT Commit: 47403ba4f5d552cabb94bc710e050dc114bcc922 Parents: 1b3d071 Author: Josh Elser <els...@apache.org> Authored: Mon Dec 2 12:43:58 2013 -0500 Committer: Josh Elser <els...@apache.org> Committed: Tue Dec 3 11:41:36 2013 -0500 ---------------------------------------------------------------------- README | 5 +++++ 1 file changed, 5 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/accumulo/blob/47403ba4/README ---------------------------------------------------------------------- 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".
