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| <div class="subTitle">org.apache.hadoop.hdfs.server.blockmanagement</div> |
| <h2 title="Class AvailableSpaceBlockPlacementPolicy" class="title">Class AvailableSpaceBlockPlacementPolicy</h2> |
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| <li>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy</li> |
| <li> |
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| <li>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</li> |
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| <li>org.apache.hadoop.hdfs.server.blockmanagement.AvailableSpaceBlockPlacementPolicy</li> |
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| <pre>public class <span class="typeNameLabel">AvailableSpaceBlockPlacementPolicy</span> |
| extends org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</pre> |
| <div class="block">Space balanced block placement policy.</div> |
| </li> |
| </ul> |
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| <h3>Fields inherited from class org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</h3> |
| <code>clusterMap, considerLoad, considerLoadFactor, heartbeatInterval, host2datanodeMap, tolerateHeartbeatMultiplier</code></li> |
| </ul> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/AvailableSpaceBlockPlacementPolicy.html#AvailableSpaceBlockPlacementPolicy--">AvailableSpaceBlockPlacementPolicy</a></span>()</code> </td> |
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| <td class="colFirst"><code>protected org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/AvailableSpaceBlockPlacementPolicy.html#chooseDataNode-java.lang.String-java.util.Collection-">chooseDataNode</a></span>(<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> scope, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><org.apache.hadoop.net.Node> excludedNode)</code> |
| <div class="block">Choose a datanode from the given <i>scope</i>.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>protected org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/AvailableSpaceBlockPlacementPolicy.html#chooseDataNode-java.lang.String-java.util.Collection-org.apache.hadoop.fs.StorageType-">chooseDataNode</a></span>(<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> scope, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><org.apache.hadoop.net.Node> excludedNode, |
| org.apache.hadoop.fs.StorageType type)</code> |
| <div class="block">Choose a datanode from the given <i>scope</i> with specified |
| storage type.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/AvailableSpaceBlockPlacementPolicy.html#chooseLocalStorage-org.apache.hadoop.net.Node-java.util.Set-long-int-java.util.List-boolean-java.util.EnumMap-boolean-">chooseLocalStorage</a></span>(org.apache.hadoop.net.Node localMachine, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><org.apache.hadoop.net.Node> excludedNodes, |
| long blocksize, |
| int maxNodesPerRack, |
| <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/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a>> results, |
| boolean avoidStaleNodes, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/EnumMap.html?is-external=true" title="class or interface in java.util">EnumMap</a><org.apache.hadoop.fs.StorageType,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>> storageTypes, |
| boolean fallbackToLocalRack)</code> |
| <div class="block">Choose <i>localMachine</i> as the target.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/AvailableSpaceBlockPlacementPolicy.html#compareDataNode-org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor-org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor-boolean-">compareDataNode</a></span>(org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor a, |
| org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor b, |
| boolean isBalanceLocal)</code> |
| <div class="block">Compare the two data nodes.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/AvailableSpaceBlockPlacementPolicy.html#initialize-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hdfs.server.blockmanagement.FSClusterStats-org.apache.hadoop.net.NetworkTopology-org.apache.hadoop.hdfs.server.blockmanagement.Host2NodesMap-">initialize</a></span>(org.apache.hadoop.conf.Configuration conf, |
| org.apache.hadoop.hdfs.server.blockmanagement.FSClusterStats stats, |
| org.apache.hadoop.net.NetworkTopology clusterMap, |
| org.apache.hadoop.hdfs.server.blockmanagement.Host2NodesMap host2datanodeMap)</code> |
| <div class="block">Used to setup a BlockPlacementPolicy object.</div> |
| </td> |
| </tr> |
| </table> |
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| <li class="blockList"><a name="methods.inherited.from.class.org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</h3> |
| <code>addToExcludedNodes, chooseFavouredNodes, chooseLocalOrFavoredStorage, chooseLocalRack, chooseLocalStorage, chooseRandom, chooseRandom, chooseRemoteRack, chooseReplicasToDelete, chooseReplicaToDelete, chooseTarget, chooseTarget, chooseTargetInOrder, getMaxNodesPerRack, isMovable, pickupReplicaSet, verifyBlockPlacement</code></li> |
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| </a> |
| <h3>Methods inherited from class org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy</h3> |
| <code>adjustSetsWithChosenReplica, getDatanodeInfo, getRack, splitNodesWithRack</code></li> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a name="AvailableSpaceBlockPlacementPolicy--"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>AvailableSpaceBlockPlacementPolicy</h4> |
| <pre>public AvailableSpaceBlockPlacementPolicy()</pre> |
| </li> |
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| <a name="initialize-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hdfs.server.blockmanagement.FSClusterStats-org.apache.hadoop.net.NetworkTopology-org.apache.hadoop.hdfs.server.blockmanagement.Host2NodesMap-"> |
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| <h4>initialize</h4> |
| <pre>public void initialize(org.apache.hadoop.conf.Configuration conf, |
| org.apache.hadoop.hdfs.server.blockmanagement.FSClusterStats stats, |
| org.apache.hadoop.net.NetworkTopology clusterMap, |
| org.apache.hadoop.hdfs.server.blockmanagement.Host2NodesMap host2datanodeMap)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy</code></span></div> |
| <div class="block">Used to setup a BlockPlacementPolicy object. This should be defined by |
| all implementations of a BlockPlacementPolicy.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>initialize</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - the configuration object</dd> |
| <dd><code>stats</code> - retrieve cluster status from here</dd> |
| <dd><code>clusterMap</code> - cluster topology</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="chooseDataNode-java.lang.String-java.util.Collection-org.apache.hadoop.fs.StorageType-"> |
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| </a> |
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| <h4>chooseDataNode</h4> |
| <pre>protected org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor chooseDataNode(<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> scope, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><org.apache.hadoop.net.Node> excludedNode, |
| org.apache.hadoop.fs.StorageType type)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></span></div> |
| <div class="block">Choose a datanode from the given <i>scope</i> with specified |
| storage type.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>chooseDataNode</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the chosen node, if there is any.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="chooseLocalStorage-org.apache.hadoop.net.Node-java.util.Set-long-int-java.util.List-boolean-java.util.EnumMap-boolean-"> |
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| </a> |
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| <h4>chooseLocalStorage</h4> |
| <pre>protected <a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a> chooseLocalStorage(org.apache.hadoop.net.Node localMachine, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><org.apache.hadoop.net.Node> excludedNodes, |
| long blocksize, |
| int maxNodesPerRack, |
| <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/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a>> results, |
| boolean avoidStaleNodes, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/EnumMap.html?is-external=true" title="class or interface in java.util">EnumMap</a><org.apache.hadoop.fs.StorageType,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>> storageTypes, |
| boolean fallbackToLocalRack) |
| throws org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy.NotEnoughReplicasException</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></span></div> |
| <div class="block">Choose <i>localMachine</i> as the target. |
| if <i>localMachine</i> is not available, |
| choose a node on the same rack</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>chooseLocalStorage</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the chosen storage</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy.NotEnoughReplicasException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="chooseDataNode-java.lang.String-java.util.Collection-"> |
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| </a> |
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| <h4>chooseDataNode</h4> |
| <pre>protected org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor chooseDataNode(<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> scope, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><org.apache.hadoop.net.Node> excludedNode)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></span></div> |
| <div class="block">Choose a datanode from the given <i>scope</i>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>chooseDataNode</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the chosen node, if there is any.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="compareDataNode-org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor-org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor-boolean-"> |
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| </a> |
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| <h4>compareDataNode</h4> |
| <pre>protected int compareDataNode(org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor a, |
| org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor b, |
| boolean isBalanceLocal)</pre> |
| <div class="block">Compare the two data nodes.</div> |
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