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| <div class="subTitle">org.apache.hadoop.hdfs.server.blockmanagement</div> |
| <h2 title="Class BlockPlacementPolicyWithNodeGroup" class="title">Class BlockPlacementPolicyWithNodeGroup</h2> |
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| <li>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy</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.BlockPlacementPolicyWithNodeGroup</li> |
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| <pre>public class <span class="typeNameLabel">BlockPlacementPolicyWithNodeGroup</span> |
| extends org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</pre> |
| <div class="block">The class is responsible for choosing the desired number of targets |
| for placing block replicas on environment with node-group layer. |
| The replica placement strategy is adjusted to: |
| If the writer is on a datanode, the 1st replica is placed on the local |
| node(or local node-group or on local rack), otherwise a random datanode. |
| The 2nd replica is placed on a datanode that is on a different rack with 1st |
| replica node. |
| The 3rd replica is placed on a datanode which is on a different node-group |
| but the same rack as the second replica node.</div> |
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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> |
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| <h3>Fields inherited from class org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy</h3> |
| <code>LOG</code></li> |
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| <td class="colFirst"><code>protected </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.html#BlockPlacementPolicyWithNodeGroup--">BlockPlacementPolicyWithNodeGroup</a></span>()</code> </td> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.html#addToExcludedNodes-org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor-java.util.Set-">addToExcludedNodes</a></span>(org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor chosenNode, |
| <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)</code> |
| <div class="block">Find other nodes in the same nodegroup of <i>localMachine</i> and add them |
| into <i>excludeNodes</i> as replica should not be duplicated for nodes |
| within the same nodegroup</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.html#chooseFavouredNodes-java.lang.String-int-java.util.List-java.util.Set-long-int-java.util.List-boolean-java.util.EnumMap-">chooseFavouredNodes</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> src, |
| int numOfReplicas, |
| <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><org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor> favoredNodes, |
| <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> favoriteAndExcludedNodes, |
| 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)</code> |
| <div class="block">choose all good favored nodes as target.</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/BlockPlacementPolicyWithNodeGroup.html#chooseLocalRack-org.apache.hadoop.net.Node-java.util.Set-long-int-java.util.List-boolean-java.util.EnumMap-">chooseLocalRack</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)</code> |
| <div class="block">Choose one node from the rack that <i>localMachine</i> is on.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <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/BlockPlacementPolicyWithNodeGroup.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 fallbackToNodeGroupAndLocalRack)</code> |
| <div class="block">choose local node of <i>localMachine</i> as the target.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.html#chooseRemoteRack-int-org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor-java.util.Set-long-int-java.util.List-boolean-java.util.EnumMap-">chooseRemoteRack</a></span>(int numOfReplicas, |
| org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor 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 maxReplicasPerRack, |
| <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)</code> |
| <div class="block">Choose <i>numOfReplicas</i> nodes from the racks |
| that <i>localMachine</i> is NOT on.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>protected <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/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.html#getRack-org.apache.hadoop.hdfs.protocol.DatanodeInfo-">getRack</a></span>(org.apache.hadoop.hdfs.protocol.DatanodeInfo cur)</code> |
| <div class="block">Get rack string from a data node</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.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> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.html#isMovable-java.util.Collection-org.apache.hadoop.hdfs.protocol.DatanodeInfo-org.apache.hadoop.hdfs.protocol.DatanodeInfo-">isMovable</a></span>(<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.hdfs.protocol.DatanodeInfo> locs, |
| org.apache.hadoop.hdfs.protocol.DatanodeInfo source, |
| org.apache.hadoop.hdfs.protocol.DatanodeInfo target)</code> |
| <div class="block">Check if there are any replica (other than source) on the same node group |
| with target.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><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><<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/BlockPlacementPolicyWithNodeGroup.html#pickupReplicaSet-java.util.Collection-java.util.Collection-java.util.Map-">pickupReplicaSet</a></span>(<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><<a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a>> first, |
| <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><<a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a>> second, |
| <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="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="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>>> rackMap)</code> |
| <div class="block">Pick up replica node set for deleting replica as over-replicated.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementStatus</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.html#verifyBlockPlacement-org.apache.hadoop.hdfs.protocol.DatanodeInfo:A-int-">verifyBlockPlacement</a></span>(org.apache.hadoop.hdfs.protocol.DatanodeInfo[] locs, |
| int numberOfReplicas)</code> |
| <div class="block">Verify if the block's placement meets requirement of placement policy, |
| i.e.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <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>chooseDataNode, chooseDataNode, chooseLocalOrFavoredStorage, chooseLocalStorage, chooseRandom, chooseRandom, chooseReplicasToDelete, chooseReplicaToDelete, chooseTarget, chooseTarget, chooseTargetInOrder, getMaxNodesPerRack</code></li> |
| </ul> |
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| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy</h3> |
| <code>adjustSetsWithChosenReplica, getDatanodeInfo, splitNodesWithRack</code></li> |
| </ul> |
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| </a> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
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| </ul> |
| </div> |
| <div class="details"> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a name="BlockPlacementPolicyWithNodeGroup--"> |
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| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>BlockPlacementPolicyWithNodeGroup</h4> |
| <pre>protected BlockPlacementPolicyWithNodeGroup()</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
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| <h3>Method Detail</h3> |
| <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="chooseFavouredNodes-java.lang.String-int-java.util.List-java.util.Set-long-int-java.util.List-boolean-java.util.EnumMap-"> |
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| <h4>chooseFavouredNodes</h4> |
| <pre>protected void chooseFavouredNodes(<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> src, |
| int numOfReplicas, |
| <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><org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor> favoredNodes, |
| <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> favoriteAndExcludedNodes, |
| 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) |
| throws org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy.NotEnoughReplicasException</pre> |
| <div class="block">choose all good favored nodes as target. |
| If no enough targets, then choose one replica from |
| each bad favored node's node group.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>chooseFavouredNodes</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>NotEnoughReplicasException</code></dd> |
| <dd><code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy.NotEnoughReplicasException</code></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> |
| <ul class="blockList"> |
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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 fallbackToNodeGroupAndLocalRack) |
| throws org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy.NotEnoughReplicasException</pre> |
| <div class="block">choose local node of <i>localMachine</i> as the target. |
| If localMachine is not available, will fallback to nodegroup/rack |
| when flag <i>fallbackToNodeGroupAndLocalRack</i> is set.</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 node</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="chooseLocalRack-org.apache.hadoop.net.Node-java.util.Set-long-int-java.util.List-boolean-java.util.EnumMap-"> |
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| </a> |
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| <h4>chooseLocalRack</h4> |
| <pre>protected <a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a> chooseLocalRack(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) |
| 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 one node from the rack that <i>localMachine</i> is on. |
| if no such node is available, choose one node from the rack where |
| a second replica is on. |
| if still no such node is available, choose a random node |
| in the cluster.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>chooseLocalRack</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the chosen node</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="chooseRemoteRack-int-org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor-java.util.Set-long-int-java.util.List-boolean-java.util.EnumMap-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>chooseRemoteRack</h4> |
| <pre>protected void chooseRemoteRack(int numOfReplicas, |
| org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor 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 maxReplicasPerRack, |
| <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) |
| 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>numOfReplicas</i> nodes from the racks |
| that <i>localMachine</i> is NOT on. |
| If not enough nodes are available, choose the remaining ones |
| from the local rack</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>chooseRemoteRack</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></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="getRack-org.apache.hadoop.hdfs.protocol.DatanodeInfo-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getRack</h4> |
| <pre>protected <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> getRack(org.apache.hadoop.hdfs.protocol.DatanodeInfo cur)</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">Get rack string from a data node</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>getRack</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>rack of data node</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addToExcludedNodes-org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor-java.util.Set-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>addToExcludedNodes</h4> |
| <pre>protected int addToExcludedNodes(org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor chosenNode, |
| <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)</pre> |
| <div class="block">Find other nodes in the same nodegroup of <i>localMachine</i> and add them |
| into <i>excludeNodes</i> as replica should not be duplicated for nodes |
| within the same nodegroup</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>addToExcludedNodes</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>number of new excluded nodes</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="pickupReplicaSet-java.util.Collection-java.util.Collection-java.util.Map-"> |
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| <h4>pickupReplicaSet</h4> |
| <pre>public <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><<a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a>> pickupReplicaSet(<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><<a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a>> first, |
| <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><<a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStorageInfo.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">DatanodeStorageInfo</a>> second, |
| <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="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="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>>> rackMap)</pre> |
| <div class="block">Pick up replica node set for deleting replica as over-replicated. |
| First set contains replica nodes on rack with more than one |
| replica while second set contains remaining replica nodes. |
| If first is not empty, divide first set into two subsets: |
| moreThanOne contains nodes on nodegroup with more than one replica |
| exactlyOne contains the remaining nodes in first set |
| then pickup priSet if not empty. |
| If first is empty, then pick second.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>pickupReplicaSet</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isMovable-java.util.Collection-org.apache.hadoop.hdfs.protocol.DatanodeInfo-org.apache.hadoop.hdfs.protocol.DatanodeInfo-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isMovable</h4> |
| <pre>public boolean isMovable(<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.hdfs.protocol.DatanodeInfo> locs, |
| org.apache.hadoop.hdfs.protocol.DatanodeInfo source, |
| org.apache.hadoop.hdfs.protocol.DatanodeInfo target)</pre> |
| <div class="block">Check if there are any replica (other than source) on the same node group |
| with target. If true, then target is not a good candidate for placing |
| specific replica as we don't want 2 replicas under the same nodegroup.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>isMovable</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>locs</code> - all replicas including source and target</dd> |
| <dd><code>source</code> - source replica of the move</dd> |
| <dd><code>target</code> - target replica of the move</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if there are any replica (other than source) on the same node |
| group with target</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="verifyBlockPlacement-org.apache.hadoop.hdfs.protocol.DatanodeInfo:A-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>verifyBlockPlacement</h4> |
| <pre>public org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementStatus verifyBlockPlacement(org.apache.hadoop.hdfs.protocol.DatanodeInfo[] locs, |
| int numberOfReplicas)</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">Verify if the block's placement meets requirement of placement policy, |
| i.e. replicas are placed on no less than minRacks racks in the system.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>verifyBlockPlacement</code> in class <code>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>locs</code> - block with locations</dd> |
| <dd><code>numberOfReplicas</code> - replica number of file to be verified</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the result of verification</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
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