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+<a class="dida" href="zookeeperQuotas.pdf"><img alt="PDF -icon" src="skin/images/pdfdoc.gif" class="skin"><br>
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+ PDF</a>
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+</div>
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+<h1>ZooKeeper Quota's Guide</h1>
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+<h3>A Guide to Deployment and Administration</h3>
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+<div id="minitoc-area">
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+<ul class="minitoc">
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+<li>
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+<a href="#zookeeper_quotas">Quotas</a>
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+<ul class="minitoc">
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+<li>
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+<a href="#Setting+Quotas">Setting Quotas</a>
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+</li>
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+<li>
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+<a href="#Listing+Quotas">Listing Quotas</a>
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+</li>
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+<li>
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+<a href="#Deleting+Quotas"> Deleting Quotas</a>
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+</li>
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+</ul>
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+</li>
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+</ul>
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+</div>
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+
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+
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+
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+
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+<a name="N1000B"></a><a name="zookeeper_quotas"></a>
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+<h2 class="h3">Quotas</h2>
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+<div class="section">
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+<p> ZooKeeper has both namespace and bytes quotas. You can use the ZooKeeperMain class to setup quotas.
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+ ZooKeeper prints <em>WARN</em> messages if users exceed the quota assigned to them. The messages
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+ are printed in the log of the ZooKeeper.
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+ </p>
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+<p>
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+<span class="codefrag computeroutput">$java -cp zookeeper.jar:src/java/lib/log4j-1.2.15.jar/conf \
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+ org.apache.zookeeper.ZooKeeperMain host:port</span>
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+</p>
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+<p> The above command gives you a command line option of using quotas.</p>
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+<a name="N1001F"></a><a name="Setting+Quotas"></a>
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+<h3 class="h4">Setting Quotas</h3>
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+<p>You can use
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+ <em>setquota</em> to set a quota on a ZooKeeper node. It has an option of setting quota with
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+ -n (for namespace)
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+ and -b (for bytes). </p>
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+<p> The ZooKeeper quota are stored in ZooKeeper itself in /zookeeper/quota. To disable other people from
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+ changing the quota's set the ACL for /zookeeper/quota such that only admins are able to read and write to it.
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+ </p>
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+<a name="N1002F"></a><a name="Listing+Quotas"></a>
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+<h3 class="h4">Listing Quotas</h3>
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+<p> You can use
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+ <em>listquota</em> to list a quota on a ZooKeeper node.
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+ </p>
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+<a name="N1003C"></a><a name="Deleting+Quotas"></a>
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+<h3 class="h4"> Deleting Quotas</h3>
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+<p> You can use
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+ <em>delquota</em> to delete quota on a ZooKeeper node.
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+ </p>
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+</div>
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+
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+ 2008 <a href="http://www.apache.org/licenses/">The Apache Software Foundation.</a>
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Mahadev Konar