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| <div class="subTitle">org.apache.ignite.spi.loadbalancing.adaptive</div> |
| <h2 title="Class AdaptiveCpuLoadProbe" class="title">Class AdaptiveCpuLoadProbe</h2> |
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| <li>org.apache.ignite.spi.loadbalancing.adaptive.AdaptiveCpuLoadProbe</li> |
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| <dd><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveLoadProbe.html" title="interface in org.apache.ignite.spi.loadbalancing.adaptive">AdaptiveLoadProbe</a></dd> |
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| <pre>public class <span class="typeNameLabel">AdaptiveCpuLoadProbe</span> |
| extends <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> |
| implements <a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveLoadProbe.html" title="interface in org.apache.ignite.spi.loadbalancing.adaptive">AdaptiveLoadProbe</a></pre> |
| <div class="block">Implementation of node load probing based on CPU load. |
| <p> |
| Based on <a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#setUseAverage-boolean-"><code>setUseAverage(boolean)</code></a> |
| parameter, this implementation will either use average CPU load |
| values or current (default is to use averages). |
| <p> |
| Based on <a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#setUseProcessors-boolean-"><code>setUseProcessors(boolean)</code></a> parameter, this implementation |
| will either take number of processors on the node into account or not. |
| Since CPU load on multi-processor boxes shows medium load of multiple CPU's it |
| usually means that the remaining capacity is proportional to the number of |
| CPU's (or cores) on the node. This configuration parameter indicates |
| whether to divide each node's CPU load by the number of processors on that node |
| (default is <code>true</code>). |
| <p> |
| Also note that in some environments every processor may not be adding 100% of |
| processing power. For example, if you are using multi-core CPU's, then addition of |
| every core would probably result in about 75% of extra CPU power. To account |
| for that, you should set <a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#setProcessorCoefficient-double-"><code>setProcessorCoefficient(double)</code></a> parameter to |
| <code>0.75</code> . |
| <p> |
| Below is an example of how CPU load probe would be configured in Ignite |
| Spring configuration file: |
| <pre name="code" class="xml"> |
| <property name="loadBalancingSpi"> |
| <bean class="org.apache.ignite.spi.loadBalancing.adaptive.GridAdaptiveLoadBalancingSpi"> |
| <property name="loadProbe"> |
| <bean class="org.apache.ignite.spi.loadBalancing.adaptive.GridAdaptiveCpuLoadProbe"> |
| <property name="useAverage" value="true"/> |
| <property name="useProcessors" value="true"/> |
| <property name="processorCoefficient" value="0.9"/> |
| </bean> |
| </property> |
| </bean> |
| </property> |
| </pre> |
| <p> |
| This implementation is used by default by <a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveLoadBalancingSpi.html" title="class in org.apache.ignite.spi.loadbalancing.adaptive"><code>AdaptiveLoadBalancingSpi</code></a> SPI.</div> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#AdaptiveCpuLoadProbe--">AdaptiveCpuLoadProbe</a></span>()</code> |
| <div class="block">Initializes CPU load probe to use CPU load average by default.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#AdaptiveCpuLoadProbe-boolean-boolean-">AdaptiveCpuLoadProbe</a></span>(boolean useAvg, |
| boolean useProcs)</code> |
| <div class="block">Specifies whether to use average CPU load vs. current and whether or |
| not to take number of processors into account.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#AdaptiveCpuLoadProbe-boolean-boolean-double-">AdaptiveCpuLoadProbe</a></span>(boolean useAvg, |
| boolean useProcs, |
| double procCoefficient)</code> |
| <div class="block">Specifies whether to use average CPU load vs. current and whether or |
| not to take number of processors into account.</div> |
| </td> |
| </tr> |
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| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#getLoad-org.apache.ignite.cluster.ClusterNode-int-">getLoad</a></span>(<a href="../../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> node, |
| int jobsSentSinceLastUpdate)</code> |
| <div class="block">Calculates load value for a given node.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#getProcessorCoefficient--">getProcessorCoefficient</a></span>()</code> |
| <div class="block">Gets coefficient of every CPU processor.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#isUseAverage--">isUseAverage</a></span>()</code> |
| <div class="block">Gets flag indicating whether to use average CPU load vs. current.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#isUseProcessors--">isUseProcessors</a></span>()</code> |
| <div class="block">Gets flag indicating whether to use average CPU load vs. current |
| (default is <code>true</code>).</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/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#setProcessorCoefficient-double-">setProcessorCoefficient</a></span>(double procCoefficient)</code> |
| <div class="block">Sets coefficient of every CPU processor.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#setUseAverage-boolean-">setUseAverage</a></span>(boolean useAvg)</code> |
| <div class="block">Sets flag indicating whether to use average CPU load vs. current.</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/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#setUseProcessors-boolean-">setUseProcessors</a></span>(boolean useProcs)</code> |
| <div class="block">Sets flag indicating whether to use average CPU load vs. current |
| (default is <code>true</code>).</div> |
| </td> |
| </tr> |
| <tr id="i7" 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/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#toString--">toString</a></span>()</code></td> |
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| <a name="AdaptiveCpuLoadProbe--"> |
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| <li class="blockList"> |
| <h4>AdaptiveCpuLoadProbe</h4> |
| <pre>public AdaptiveCpuLoadProbe()</pre> |
| <div class="block">Initializes CPU load probe to use CPU load average by default.</div> |
| </li> |
| </ul> |
| <a name="AdaptiveCpuLoadProbe-boolean-boolean-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>AdaptiveCpuLoadProbe</h4> |
| <pre>public AdaptiveCpuLoadProbe(boolean useAvg, |
| boolean useProcs)</pre> |
| <div class="block">Specifies whether to use average CPU load vs. current and whether or |
| not to take number of processors into account. |
| <p> |
| Since CPU load on multi-processor boxes shows medium load of multiple CPU's it |
| usually means that the remaining capacity is proportional to the number of |
| CPU's (or cores) on the node.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>useAvg</code> - Flag indicating whether to use average CPU load vs. current |
| (default is <code>true</code>).</dd> |
| <dd><code>useProcs</code> - Flag indicating whether to divide each node's CPU load |
| by the number of processors on that node (default is <code>true</code>).</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="AdaptiveCpuLoadProbe-boolean-boolean-double-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>AdaptiveCpuLoadProbe</h4> |
| <pre>public AdaptiveCpuLoadProbe(boolean useAvg, |
| boolean useProcs, |
| double procCoefficient)</pre> |
| <div class="block">Specifies whether to use average CPU load vs. current and whether or |
| not to take number of processors into account. It also allows to |
| specify the coefficient of addition power every CPU adds. |
| <p> |
| Since CPU load on multi-processor boxes shows medium load of multiple CPU's it |
| usually means that the remaining capacity is proportional to the number of |
| CPU's (or cores) on the node. |
| <p> |
| Also, in some environments every processor may not be adding 100% of processing |
| power. For example, if you are using multi-core CPU's, then addition of |
| every core would probably result in about 75% of extra CPU power, and hence |
| you would set this coefficient to <code>0.75</code> .</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>useAvg</code> - Flag indicating whether to use average CPU load vs. current |
| (default is <code>true</code>).</dd> |
| <dd><code>useProcs</code> - Flag indicating whether to divide each node's CPU load |
| by the number of processors on that node (default is <code>true</code>).</dd> |
| <dd><code>procCoefficient</code> - Coefficient of every CPU processor (default value is <code>1</code>).</dd> |
| </dl> |
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| </li> |
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| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
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| <a name="isUseAverage--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isUseAverage</h4> |
| <pre>public boolean isUseAverage()</pre> |
| <div class="block">Gets flag indicating whether to use average CPU load vs. current.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Flag indicating whether to use average CPU load vs. current.</dd> |
| </dl> |
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| </ul> |
| <a name="setUseAverage-boolean-"> |
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| <h4>setUseAverage</h4> |
| <pre>public void setUseAverage(boolean useAvg)</pre> |
| <div class="block">Sets flag indicating whether to use average CPU load vs. current. |
| If not explicitly set, then default value is <code>true</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>useAvg</code> - Flag indicating whether to use average CPU load vs. current.</dd> |
| </dl> |
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| </ul> |
| <a name="isUseProcessors--"> |
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| </a> |
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| <li class="blockList"> |
| <h4>isUseProcessors</h4> |
| <pre>public boolean isUseProcessors()</pre> |
| <div class="block">Gets flag indicating whether to use average CPU load vs. current |
| (default is <code>true</code>). |
| <p> |
| Since CPU load on multi-processor boxes shows medium load of multiple CPU's it |
| usually means that the remaining capacity is proportional to the number of |
| CPU's (or cores) on the node.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Flag indicating whether to divide each node's CPU load |
| by the number of processors on that node (default is <code>true</code>).</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setUseProcessors-boolean-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setUseProcessors</h4> |
| <pre>public void setUseProcessors(boolean useProcs)</pre> |
| <div class="block">Sets flag indicating whether to use average CPU load vs. current |
| (default is <code>true</code>). |
| <p> |
| Since CPU load on multi-processor boxes shows medium load of multiple CPU's it |
| usually means that the remaining capacity is proportional to the number of |
| CPU's (or cores) on the node. |
| <p> |
| If not explicitly set, then default value is <code>true</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>useProcs</code> - Flag indicating whether to divide each node's CPU load |
| by the number of processors on that node (default is <code>true</code>).</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getProcessorCoefficient--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getProcessorCoefficient</h4> |
| <pre>public double getProcessorCoefficient()</pre> |
| <div class="block">Gets coefficient of every CPU processor. By default it is <code>1</code>, but |
| in some environments every processor may not be adding 100% of processing |
| power. For example, if you are using multi-core CPU's, then addition of |
| every core would probably result in about 75% of extra CPU power, and hence |
| you would set this coefficient to <code>0.75</code> . |
| <p> |
| This value is ignored if <a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#isUseProcessors--"><code>isUseProcessors()</code></a> is set to <code>false</code>.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Coefficient of every CPU processor.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setProcessorCoefficient-double-"> |
| <!-- --> |
| </a> |
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| <li class="blockList"> |
| <h4>setProcessorCoefficient</h4> |
| <pre>public void setProcessorCoefficient(double procCoefficient)</pre> |
| <div class="block">Sets coefficient of every CPU processor. By default it is <code>1</code>, but |
| in some environments every processor may not be adding 100% of processing |
| power. For example, if you are using multi-core CPU's, then addition of |
| every core would probably result in about 75% of extra CPU power, and hence |
| you would set this coefficient to <code>0.75</code> . |
| <p> |
| This value is ignored if <a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveCpuLoadProbe.html#isUseProcessors--"><code>isUseProcessors()</code></a> is set to <code>false</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>procCoefficient</code> - Coefficient of every CPU processor.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getLoad-org.apache.ignite.cluster.ClusterNode-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>getLoad</h4> |
| <pre>public double getLoad(<a href="../../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> node, |
| int jobsSentSinceLastUpdate)</pre> |
| <div class="block">Calculates load value for a given node. Specific implementations would |
| usually take into account some of the values provided by |
| <a href="../../../../../../org/apache/ignite/cluster/ClusterNode.html#metrics--"><code>ClusterNode.metrics()</code></a> method. For example, load can be calculated |
| based on job execution time or number of active jobs, or CPU/Heap utilization. |
| <p> |
| Note that if this method returns a value of <code>0</code>, |
| then implementation will assume that load value is simply not available and |
| will try to calculate an average of load values for other nodes. If such |
| average cannot be obtained (all node load values are <code>0</code>), then a value |
| of <code>1</code> will be used.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveLoadProbe.html#getLoad-org.apache.ignite.cluster.ClusterNode-int-">getLoad</a></code> in interface <code><a href="../../../../../../org/apache/ignite/spi/loadbalancing/adaptive/AdaptiveLoadProbe.html" title="interface in org.apache.ignite.spi.loadbalancing.adaptive">AdaptiveLoadProbe</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>node</code> - Grid node to calculate load for.</dd> |
| <dd><code>jobsSentSinceLastUpdate</code> - Number of jobs sent to this node since |
| last metrics update. This parameter may be useful when |
| implementation takes into account the current job count on a node.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Non-negative load value for the node (zero and above).</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="toString--"> |
| <!-- --> |
| </a> |
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| <h4>toString</h4> |
| <pre>public <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> toString()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><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></code> in class <code><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></code></dd> |
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