accumulo-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From e..@apache.org
Subject [2/4] accumulo git commit: ACCUMULO-3796 added instructions
Date Mon, 11 May 2015 18:40:38 GMT
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/master
Commit: c4eff0c2eb1320e411ac3e41b6f2db89c2d3ba33
Parents: 83816af
Author: Eric C. Newton <eric.newton@gmail.com>
Authored: Mon May 11 14:36:44 2015 -0400
Committer: Eric C. Newton <eric.newton@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>
-$ACCUMULO_HOME/bin/accumulo admin start &gt;host(s)&gt; {&lt;host&gt; ...}
+$ACCUMULO_HOME/bin/accumulo admin start &lt;host(s)&gt; {&lt;host&gt; ...}
 </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 &gt;host(s)&gt; {&lt;host&gt;
...}
 <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>
-$ACCUMULO_HOME/bin/accumulo admin stop &gt;host(s)&gt; {&lt;host&gt; ...}
+$ACCUMULO_HOME/bin/accumulo admin stop &lt;host(s)&gt; {&lt;host&gt; ...}
 </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" &gt;&gt; /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" &gt;&gt; /etc/sysctl.conf
+</pre>
+
 <h3>Hadoop timeouts</h3>
 
 <p>In order to detect failed datanodes, use shorter timeouts. Add the following to
your


Mime
View raw message