You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@accumulo.apache.org by ec...@apache.org on 2015/05/11 20:40:07 UTC
accumulo git commit: ACCUMULO-3796 added instructions
Repository: accumulo
Updated Branches:
refs/heads/1.6 83816af42 -> c4eff0c2e
ACCUMULO-3796 added instructions
Project: http://git-wip-us.apache.org/repos/asf/accumulo/repo
Commit: http://git-wip-us.apache.org/repos/asf/accumulo/commit/c4eff0c2
Tree: http://git-wip-us.apache.org/repos/asf/accumulo/tree/c4eff0c2
Diff: http://git-wip-us.apache.org/repos/asf/accumulo/diff/c4eff0c2
Branch: refs/heads/1.6
Commit: c4eff0c2eb1320e411ac3e41b6f2db89c2d3ba33
Parents: 83816af
Author: Eric C. Newton <er...@gmail.com>
Authored: Mon May 11 14:36:44 2015 -0400
Committer: Eric C. Newton <er...@gmail.com>
Committed: Mon May 11 14:39:32 2015 -0400
----------------------------------------------------------------------
docs/src/main/resources/administration.html | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/accumulo/blob/c4eff0c2/docs/src/main/resources/administration.html
----------------------------------------------------------------------
diff --git a/docs/src/main/resources/administration.html b/docs/src/main/resources/administration.html
index 5898037..aab1470 100644
--- a/docs/src/main/resources/administration.html
+++ b/docs/src/main/resources/administration.html
@@ -58,7 +58,7 @@ forcibly shut down after 5 seconds.
<p>Update your <code>$ACCUMULO_HOME/conf/slaves</code> (or <code>$ACCUMULO_CONF_DIR/slaves</code>) file to account for the addition; at a minimum this needs to be on the host(s) being added, but in practice it's good to ensure consistent configuration across all nodes.</p>
<pre>
-$ACCUMULO_HOME/bin/accumulo admin start >host(s)> {<host> ...}
+$ACCUMULO_HOME/bin/accumulo admin start <host(s)> {<host> ...}
</pre>
<p>Alternatively, you can ssh to each of the hosts you want to add and run <code>$ACCUMULO_HOME/bin/start-here.sh</code>.</p>
@@ -70,7 +70,7 @@ $ACCUMULO_HOME/bin/accumulo admin start >host(s)> {<host> ...}
<p>If you need to take a node out of operation, you can trigger a graceful shutdown of a tablet server. Accumulo will automatically rebalance the tablets across the available tablet servers.</p>
<pre>
-$ACCUMULO_HOME/bin/accumulo admin stop >host(s)> {<host> ...}
+$ACCUMULO_HOME/bin/accumulo admin stop <host(s)> {<host> ...}
</pre>
<p>Alternatively, you can ssh to each of the hosts you want to remove and run <code>$ACCUMULO_HOME/bin/stop-here.sh</code>.</p>
@@ -135,6 +135,18 @@ that swappiness be set to zero.
# echo "vm.swappiness = 0" >> /etc/sysctl.conf
</pre>
+<h3>Zone reclaim mode</h3>
+
+<p>Turn off zone reclaim mode. See this great article for all the
+<a href="http://engineering.linkedin.com/performance/optimizing-linux-memory-management-low-latency-high-throughput-databases">
+details on why.
+</a>
+
+<pre>
+ # sysctl -w vm.zone_reclaim_mode=0
+ # echo "vm.zone_reclaim_mode = 0" >> /etc/sysctl.conf
+</pre>
+
<h3>Hadoop timeouts</h3>
<p>In order to detect failed datanodes, use shorter timeouts. Add the following to your