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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.heron.packing.roundrobin</a></div> |
| <h2 title="Class RoundRobinPacking" class="title">Class RoundRobinPacking</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.heron.packing.roundrobin.RoundRobinPacking</li> |
| </ul> |
| </li> |
| </ul> |
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| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code>java.lang.AutoCloseable</code>, <code><a href="../../spi/packing/IPacking.html" title="interface in org.apache.heron.spi.packing">IPacking</a></code>, <code><a href="../../spi/packing/IRepacking.html" title="interface in org.apache.heron.spi.packing">IRepacking</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public class <span class="typeNameLabel">RoundRobinPacking</span> |
| extends java.lang.Object |
| implements <a href="../../spi/packing/IPacking.html" title="interface in org.apache.heron.spi.packing">IPacking</a>, <a href="../../spi/packing/IRepacking.html" title="interface in org.apache.heron.spi.packing">IRepacking</a></pre> |
| <div class="block">Round-robin packing algorithm |
| <p> |
| This IPacking implementation generates PackingPlan: instances of the component are assigned |
| to each container one by one in circular order, without any priority. Each container is expected |
| to take equal number of instances if # of instances is multiple of # of containers. |
| <p> |
| Following semantics are guaranteed: |
| 1. Every container requires same size of resource, i.e. same CPU, RAM and disk. |
| Consider that instances in different containers can be different, the value of size |
| will be aligned to the max one. |
| <p> |
| 2. The size of resource required by the whole topology is equal to |
| ((# of container specified in config) + 1) * (size of resource required for a single container). |
| The extra 1 is considered for Heron internal container, |
| i.e. the one containing Scheduler and TManager. |
| <p> |
| 3. The disk required for a container is calculated as: |
| value for org.apache.heron.api.Config.TOPOLOGY_CONTAINER_DISK_REQUESTED if exists, otherwise, |
| (disk for instances in container) + (disk padding for heron internal process) |
| <p> |
| 4. The CPU required for a container is calculated as: |
| value for org.apache.heron.api.Config.TOPOLOGY_CONTAINER_CPU_REQUESTED if exists, otherwise, |
| (CPU for instances in container) + (CPU padding for heron internal process) |
| <p> |
| 5. The RAM required for a container is calculated as: |
| value for org.apache.heron.api.Config.TOPOLOGY_CONTAINER_RAM_REQUESTED if exists, otherwise, |
| (RAM for instances in container) + (RAM padding for heron internal process) |
| <p> |
| 6. The RAM required for one instance is calculated as: |
| value in org.apache.heron.api.Config.TOPOLOGY_COMPONENT_RAMMAP if exists, otherwise, |
| - if org.apache.heron.api.Config.TOPOLOGY_CONTAINER_RAM_REQUESTED not exists: |
| the default RAM value for one instance |
| - if org.apache.heron.api.Config.TOPOLOGY_CONTAINER_RAM_REQUESTED exists: |
| ((TOPOLOGY_CONTAINER_RAM_REQUESTED) - (RAM padding for heron internal process) |
| - (RAM used by instances within TOPOLOGY_COMPONENT_RAMMAP config))) / |
| (the # of instances in container not specified in TOPOLOGY_COMPONENT_RAMMAP config) |
| 7. The pack() return null if PackingPlan fails to pass the safe check, for instance, |
| the size of RAM for an instance is less than the minimal required value.</div> |
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| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">RoundRobinPacking</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </table> |
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| </section> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary"> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#close()">close</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">This is to for disposing or cleaning up any internal state accumulated by |
| the uploader</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>java.util.Map<java.lang.String,​java.lang.Integer></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNewComponentParallelism(org.apache.heron.spi.packing.PackingPlan,java.util.Map)">getNewComponentParallelism</a></span>​(<a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> currentPackingPlan, |
| java.util.Map<java.lang.String,​java.lang.Integer> componentChanges)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#initialize(org.apache.heron.spi.common.Config,org.apache.heron.api.generated.TopologyAPI.Topology)">initialize</a></span>​(<a href="../../spi/common/Config.html" title="class in org.apache.heron.spi.common">Config</a> config, |
| <a href="../../api/generated/TopologyAPI.Topology.html" title="class in org.apache.heron.api.generated">TopologyAPI.Topology</a> inputTopology)</code></th> |
| <td class="colLast"> |
| <div class="block">Initialize the packing algorithm with the static config and the topology</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#pack()">pack</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Called by scheduler to generate container packing.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#repack(org.apache.heron.spi.packing.PackingPlan,int,java.util.Map)">repack</a></span>​(<a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> currentPackingPlan, |
| int containers, |
| java.util.Map<java.lang.String,​java.lang.Integer> componentChanges)</code></th> |
| <td class="colLast"> |
| <div class="block">Read the current packing plan with update parallelism and number of containers |
| to calculate a new packing plan.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#repack(org.apache.heron.spi.packing.PackingPlan,java.util.Map)">repack</a></span>​(<a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> currentPackingPlan, |
| java.util.Map<java.lang.String,​java.lang.Integer> componentChanges)</code></th> |
| <td class="colLast"> |
| <div class="block">Read the current packing plan with update parallelism to calculate a new packing plan.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
| </li> |
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| </section> |
| </li> |
| </ul> |
| </div> |
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| <h4>RoundRobinPacking</h4> |
| <pre>public RoundRobinPacking()</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ============ METHOD DETAIL ========== --> |
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| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a id="initialize(org.apache.heron.spi.common.Config,org.apache.heron.api.generated.TopologyAPI.Topology)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>initialize</h4> |
| <pre class="methodSignature">public void initialize​(<a href="../../spi/common/Config.html" title="class in org.apache.heron.spi.common">Config</a> config, |
| <a href="../../api/generated/TopologyAPI.Topology.html" title="class in org.apache.heron.api.generated">TopologyAPI.Topology</a> inputTopology)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../spi/packing/IPacking.html#initialize(org.apache.heron.spi.common.Config,org.apache.heron.api.generated.TopologyAPI.Topology)">IPacking</a></code></span></div> |
| <div class="block">Initialize the packing algorithm with the static config and the topology</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../spi/packing/IPacking.html#initialize(org.apache.heron.spi.common.Config,org.apache.heron.api.generated.TopologyAPI.Topology)">initialize</a></code> in interface <code><a href="../../spi/packing/IPacking.html" title="interface in org.apache.heron.spi.packing">IPacking</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../spi/packing/IRepacking.html#initialize(org.apache.heron.spi.common.Config,org.apache.heron.api.generated.TopologyAPI.Topology)">initialize</a></code> in interface <code><a href="../../spi/packing/IRepacking.html" title="interface in org.apache.heron.spi.packing">IRepacking</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>config</code> - topology config</dd> |
| <dd><code>inputTopology</code> - topology to repack</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="pack()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>pack</h4> |
| <pre class="methodSignature">public <a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> pack()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../spi/packing/IPacking.html#pack()">IPacking</a></code></span></div> |
| <div class="block">Called by scheduler to generate container packing. |
| Packing algorithm output generates instance id and container id.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../spi/packing/IPacking.html#pack()">pack</a></code> in interface <code><a href="../../spi/packing/IPacking.html" title="interface in org.apache.heron.spi.packing">IPacking</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>PackingPlan describing the job to schedule.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="close()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>close</h4> |
| <pre class="methodSignature">public void close()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../spi/packing/IPacking.html#close()">IPacking</a></code></span></div> |
| <div class="block">This is to for disposing or cleaning up any internal state accumulated by |
| the uploader |
| <p> |
| Closes this stream and releases any system resources associated |
| with it. If the stream is already closed then invoking this |
| method has no effect.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code>close</code> in interface <code>java.lang.AutoCloseable</code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../spi/packing/IPacking.html#close()">close</a></code> in interface <code><a href="../../spi/packing/IPacking.html" title="interface in org.apache.heron.spi.packing">IPacking</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../spi/packing/IRepacking.html#close()">close</a></code> in interface <code><a href="../../spi/packing/IRepacking.html" title="interface in org.apache.heron.spi.packing">IRepacking</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="repack(org.apache.heron.spi.packing.PackingPlan,java.util.Map)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>repack</h4> |
| <pre class="methodSignature">public <a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> repack​(<a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> currentPackingPlan, |
| java.util.Map<java.lang.String,​java.lang.Integer> componentChanges) |
| throws <a href="../../spi/packing/PackingException.html" title="class in org.apache.heron.spi.packing">PackingException</a></pre> |
| <div class="block">Read the current packing plan with update parallelism to calculate a new packing plan. |
| This method should determine a new number of containers based on the updated parallism |
| while remaining the number of instances per container <= that of the old packing plan. |
| The packing algorithm packInternal() is shared with pack() |
| delegate to packInternal() with the new container count and component parallelism</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../spi/packing/IRepacking.html#repack(org.apache.heron.spi.packing.PackingPlan,java.util.Map)">repack</a></code> in interface <code><a href="../../spi/packing/IRepacking.html" title="interface in org.apache.heron.spi.packing">IRepacking</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>currentPackingPlan</code> - Existing packing plan</dd> |
| <dd><code>componentChanges</code> - Map < componentName, new component parallelism > |
| that contains the parallelism for each component whose parallelism has changed.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>new packing plan</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../spi/packing/PackingException.html" title="class in org.apache.heron.spi.packing">PackingException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getNewComponentParallelism(org.apache.heron.spi.packing.PackingPlan,java.util.Map)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getNewComponentParallelism</h4> |
| <pre class="methodSignature">public java.util.Map<java.lang.String,​java.lang.Integer> getNewComponentParallelism​(<a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> currentPackingPlan, |
| java.util.Map<java.lang.String,​java.lang.Integer> componentChanges)</pre> |
| </li> |
| </ul> |
| <a id="repack(org.apache.heron.spi.packing.PackingPlan,int,java.util.Map)"> |
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| </a> |
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| <li class="blockList"> |
| <h4>repack</h4> |
| <pre class="methodSignature">public <a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> repack​(<a href="../../spi/packing/PackingPlan.html" title="class in org.apache.heron.spi.packing">PackingPlan</a> currentPackingPlan, |
| int containers, |
| java.util.Map<java.lang.String,​java.lang.Integer> componentChanges) |
| throws <a href="../../spi/packing/PackingException.html" title="class in org.apache.heron.spi.packing">PackingException</a></pre> |
| <div class="block">Read the current packing plan with update parallelism and number of containers |
| to calculate a new packing plan. |
| The packing algorithm packInternal() is shared with pack() |
| delegate to packInternal() with the new container count and component parallelism</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../spi/packing/IRepacking.html#repack(org.apache.heron.spi.packing.PackingPlan,int,java.util.Map)">repack</a></code> in interface <code><a href="../../spi/packing/IRepacking.html" title="interface in org.apache.heron.spi.packing">IRepacking</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>currentPackingPlan</code> - Existing packing plan</dd> |
| <dd><code>containers</code> - < the new number of containers for the topology |
| specified by the user</dd> |
| <dd><code>componentChanges</code> - Map < componentName, new component parallelism > |
| that contains the parallelism for each component whose parallelism has changed.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>new packing plan</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../spi/packing/PackingException.html" title="class in org.apache.heron.spi.packing">PackingException</a></code></dd> |
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