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| <div class="subTitle">org.apache.hadoop.hbase</div> |
| <h2 title="Interface ClusterMetrics" class="title">Interface ClusterMetrics</h2> |
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| <pre>@InterfaceAudience.Public |
| public interface <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.68">ClusterMetrics</a></pre> |
| <div class="block">Metrics information on the HBase cluster. |
| <p> |
| <tt>ClusterMetrics</tt> provides clients with information such as: |
| <ul> |
| <li>The count and names of region servers in the cluster.</li> |
| <li>The count and names of dead region servers in the cluster.</li> |
| <li>The name of the active master for the cluster.</li> |
| <li>The name(s) of the backup master(s) for the cluster, if they exist.</li> |
| <li>The average cluster load.</li> |
| <li>The number of regions deployed on the cluster.</li> |
| <li>The number of requests since last report.</li> |
| <li>Detailed region server loading and resource usage information, |
| per server and per region.</li> |
| <li>Regions in transition at master</li> |
| <li>The unique cluster ID</li> |
| </ul> |
| <tt><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.Option.html" title="enum in org.apache.hadoop.hbase"><code>ClusterMetrics.Option</code></a></tt> provides a way to get desired ClusterStatus information. |
| The following codes will get all the cluster information. |
| <pre> |
| <code> |
| // Original version still works |
| Admin admin = connection.getAdmin(); |
| ClusterMetrics metrics = admin.getClusterStatus(); |
| // or below, a new version which has the same effects |
| ClusterMetrics metrics = admin.getClusterStatus(EnumSet.allOf(Option.class)); |
| </code> |
| </pre> |
| If information about live servers is the only wanted. |
| then codes in the following way: |
| <pre> |
| <code> |
| Admin admin = connection.getAdmin(); |
| ClusterMetrics metrics = admin.getClusterStatus(EnumSet.of(Option.LIVE_SERVERS)); |
| </code> |
| </pre></div> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.Option.html" title="enum in org.apache.hadoop.hbase">ClusterMetrics.Option</a></span></code> |
| <div class="block">Kinds of ClusterMetrics</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>default double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getAverageLoad--">getAverageLoad</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getBackupMasterNames--">getBackupMasterNames</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getBalancerOn--">getBalancerOn</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getClusterId--">getClusterId</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getDeadServerNames--">getDeadServerNames</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getHBaseVersion--">getHBaseVersion</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>default long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getLastMajorCompactionTimestamp-byte:A-">getLastMajorCompactionTimestamp</a></span>(byte[] regionName)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>default long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getLastMajorCompactionTimestamp-org.apache.hadoop.hbase.TableName-">getLastMajorCompactionTimestamp</a></span>(<a href="../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> table)</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="../../../../org/apache/hadoop/hbase/ServerMetrics.html" title="interface in org.apache.hadoop.hbase">ServerMetrics</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getLiveServerMetrics--">getLiveServerMetrics</a></span>()</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getMasterCoprocessorNames--">getMasterCoprocessorNames</a></span>()</code> </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getMasterInfoPort--">getMasterInfoPort</a></span>()</code> </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getMasterName--">getMasterName</a></span>()</code> |
| <div class="block">Returns detailed information about the current master <a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase"><code>ServerName</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>default int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getRegionCount--">getRegionCount</a></span>()</code> </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/hadoop/hbase/master/RegionState.html" title="class in org.apache.hadoop.hbase.master">RegionState</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getRegionStatesInTransition--">getRegionStatesInTransition</a></span>()</code> </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>default long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getRequestCount--">getRequestCount</a></span>()</code> </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getServersName--">getServersName</a></span>()</code> </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>,<a href="../../../../org/apache/hadoop/hbase/client/RegionStatesCount.html" title="class in org.apache.hadoop.hbase.client">RegionStatesCount</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/ClusterMetrics.html#getTableRegionStatesCount--">getTableRegionStatesCount</a></span>()</code> |
| <div class="block">Provide region states count for given table.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ METHOD DETAIL ========== --> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="getHBaseVersion--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getHBaseVersion</h4> |
| <pre>@Nullable |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.74">getHBaseVersion</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the HBase version string as reported by the HMaster</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getDeadServerNames--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getDeadServerNames</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.79">getDeadServerNames</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the names of region servers on the dead list</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getLiveServerMetrics--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getLiveServerMetrics</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="../../../../org/apache/hadoop/hbase/ServerMetrics.html" title="interface in org.apache.hadoop.hbase">ServerMetrics</a>> <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.84">getLiveServerMetrics</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the names of region servers on the live list</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRegionCount--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>getRegionCount</h4> |
| <pre>default int <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.89">getRegionCount</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of regions deployed on the cluster</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRequestCount--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getRequestCount</h4> |
| <pre>default long <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.97">getRequestCount</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of requests since last report</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMasterName--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getMasterName</h4> |
| <pre>@Nullable |
| <a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.108">getMasterName</a>()</pre> |
| <div class="block">Returns detailed information about the current master <a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase"><code>ServerName</code></a>.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>current master information if it exists</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getBackupMasterNames--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>getBackupMasterNames</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.113">getBackupMasterNames</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the names of backup masters</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRegionStatesInTransition--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>getRegionStatesInTransition</h4> |
| <pre>@InterfaceAudience.Private |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/hadoop/hbase/master/RegionState.html" title="class in org.apache.hadoop.hbase.master">RegionState</a>> <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.116">getRegionStatesInTransition</a>()</pre> |
| </li> |
| </ul> |
| <a name="getClusterId--"> |
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| </a> |
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| <h4>getClusterId</h4> |
| <pre>@Nullable |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.119">getClusterId</a>()</pre> |
| </li> |
| </ul> |
| <a name="getMasterCoprocessorNames--"> |
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| <h4>getMasterCoprocessorNames</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.121">getMasterCoprocessorNames</a>()</pre> |
| </li> |
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| <pre>default long <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.123">getLastMajorCompactionTimestamp</a>(<a href="../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> table)</pre> |
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| <h4>getLastMajorCompactionTimestamp</h4> |
| <pre>default long <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.130">getLastMajorCompactionTimestamp</a>(byte[] regionName)</pre> |
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| <pre>int <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.141">getMasterInfoPort</a>()</pre> |
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| <pre>default double <a href="../../../../src-html/org/apache/hadoop/hbase/ClusterMetrics.html#line.148">getAverageLoad</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the average cluster load</dd> |
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| <div class="block">Provide region states count for given table. |
| e.g howmany regions of give table are opened/closed/rit etc</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>map of table to region states count</dd> |
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