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| <h1>ZooKeeper Quota's Guide</h1> |
| <h3>A Guide to Deployment and Administration</h3> |
| <div id="front-matter"> |
| <div id="minitoc-area"> |
| <ul class="minitoc"> |
| <li> |
| <a href="#zookeeper_quotas">Quotas</a> |
| <ul class="minitoc"> |
| <li> |
| <a href="#Setting+Quotas">Setting Quotas</a> |
| </li> |
| <li> |
| <a href="#Listing+Quotas">Listing Quotas</a> |
| </li> |
| <li> |
| <a href="#Deleting+Quotas"> Deleting Quotas</a> |
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| |
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| |
| |
| <a name="zookeeper_quotas"></a> |
| <h2 class="h3">Quotas</h2> |
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| <p> ZooKeeper has both namespace and bytes quotas. You can use the ZooKeeperMain class to setup quotas. |
| ZooKeeper prints <em>WARN</em> messages if users exceed the quota assigned to them. The messages |
| are printed in the log of the ZooKeeper. |
| </p> |
| <p> |
| <span class="codefrag computeroutput">$java -cp zookeeper.jar:src/java/lib/log4j-1.2.16.jar:src/java/lib/jline-2.11.jar:conf \ |
| org.apache.zookeeper.ZooKeeperMain -server host:port</span> |
| </p> |
| <p> The above command gives you a command line option of using quotas.</p> |
| <a name="Setting+Quotas"></a> |
| <h3 class="h4">Setting Quotas</h3> |
| <p>You can use |
| <em>setquota</em> to set a quota on a ZooKeeper node. It has an option of setting quota with |
| -n (for namespace) |
| and -b (for bytes). </p> |
| <p> The ZooKeeper quota are stored in ZooKeeper itself in /zookeeper/quota. To disable other people from |
| changing the quota's set the ACL for /zookeeper/quota such that only admins are able to read and write to it. |
| </p> |
| <a name="Listing+Quotas"></a> |
| <h3 class="h4">Listing Quotas</h3> |
| <p> You can use |
| <em>listquota</em> to list a quota on a ZooKeeper node. |
| </p> |
| <a name="Deleting+Quotas"></a> |
| <h3 class="h4"> Deleting Quotas</h3> |
| <p> You can use |
| <em>delquota</em> to delete quota on a ZooKeeper node. |
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