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| <h1 title="Package" class="title">Package org.apache.drill.exec.resourcemgr.config.selectionpolicy</h1> |
| <div class="docSummary"> |
| <div class="block">Defines all the selection policy implementation which can be configured with Resource Management.</div> |
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| <p>See: <a href="#package.description">Description</a></p> |
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| <td class="colFirst"><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/QueueSelectionPolicy.html" title="interface in org.apache.drill.exec.resourcemgr.config.selectionpolicy">QueueSelectionPolicy</a></td> |
| <td class="colLast"> |
| <div class="block">Interface that defines all the implementation of a QueueSelectionPolicy supported by ResourceManagement</div> |
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| </tr> |
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| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/AbstractQueueSelectionPolicy.html" title="class in org.apache.drill.exec.resourcemgr.config.selectionpolicy">AbstractQueueSelectionPolicy</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/BestFitQueueSelection.html" title="class in org.apache.drill.exec.resourcemgr.config.selectionpolicy">BestFitQueueSelection</a></td> |
| <td class="colLast"> |
| <div class="block">Helps to select a queue whose <a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/QueryQueueConfig.html#getMaxQueryMemoryInMBPerNode--"><code>QueryQueueConfig.getMaxQueryMemoryInMBPerNode()</code></a> is nearest to the max memory |
| on a node required by the given query.</div> |
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| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/DefaultQueueSelection.html" title="class in org.apache.drill.exec.resourcemgr.config.selectionpolicy">DefaultQueueSelection</a></td> |
| <td class="colLast"> |
| <div class="block">Helps to select the first default queue in the list of all the provided queues.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/QueueSelectionPolicyFactory.html" title="class in org.apache.drill.exec.resourcemgr.config.selectionpolicy">QueueSelectionPolicyFactory</a></td> |
| <td class="colLast"> |
| <div class="block">Factory to return an instance of <a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/QueueSelectionPolicy.html" title="interface in org.apache.drill.exec.resourcemgr.config.selectionpolicy"><code>QueueSelectionPolicy</code></a> based on the configured policy name.</div> |
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| <td class="colFirst"><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/RandomQueueSelection.html" title="class in org.apache.drill.exec.resourcemgr.config.selectionpolicy">RandomQueueSelection</a></td> |
| <td class="colLast"> |
| <div class="block">Randomly selects a queue from the list of all the provided queues.</div> |
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| <td class="colFirst"><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/QueueSelectionPolicy.SelectionPolicy.html" title="enum in org.apache.drill.exec.resourcemgr.config.selectionpolicy">QueueSelectionPolicy.SelectionPolicy</a></td> |
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| <a name="package.description"> |
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| <h2 title="Package org.apache.drill.exec.resourcemgr.config.selectionpolicy Description">Package org.apache.drill.exec.resourcemgr.config.selectionpolicy Description</h2> |
| <div class="block">Defines all the selection policy implementation which can be configured with Resource Management. The |
| configuration which is used to specify a policy is |
| <a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/ResourcePoolTreeImpl.html#ROOT_POOL_QUEUE_SELECTION_POLICY_KEY"><code>ResourcePoolTreeImpl.ROOT_POOL_QUEUE_SELECTION_POLICY_KEY</code></a>. Selection Policy |
| helps to select a single leaf ResourcePool out of all the eligible pools whose queue can be used to admit this query. |
| Currently there are 3 types of supported policies. In future more policies can be supported by implementing |
| <a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/QueueSelectionPolicy.html" title="interface in org.apache.drill.exec.resourcemgr.config.selectionpolicy"><code>QueueSelectionPolicy</code></a> interface. |
| <ul> |
| <li><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/DefaultQueueSelection.html" title="class in org.apache.drill.exec.resourcemgr.config.selectionpolicy"><code>DefaultQueueSelection</code></a>: Out of all the eligible pools |
| this policy will choose a default pool in the list. If there are multiple default pools present in the list then |
| it will return the first default pool. If there is no default pool present then it throws |
| <a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/exception/QueueSelectionException.html" title="class in org.apache.drill.exec.resourcemgr.config.exception"><code>QueueSelectionException</code></a> |
| </li> |
| <li><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/RandomQueueSelection.html" title="class in org.apache.drill.exec.resourcemgr.config.selectionpolicy"><code>RandomQueueSelection</code></a>: Out of all the eligible pools |
| this policy will choose a pool at random. If there are no pools to select from then it throws |
| <a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/exception/QueueSelectionException.html" title="class in org.apache.drill.exec.resourcemgr.config.exception"><code>QueueSelectionException</code></a> |
| </li> |
| <li><a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/selectionpolicy/BestFitQueueSelection.html" title="class in org.apache.drill.exec.resourcemgr.config.selectionpolicy"><code>BestFitQueueSelection</code></a>: Out of all the eligible pools |
| this policy will choose a pool whose queue configuration |
| <a href="../../../../../../../org/apache/drill/exec/resourcemgr/config/QueryQueueConfigImpl.html#MAX_QUERY_MEMORY_PER_NODE_KEY"><code>QueryQueueConfigImpl.MAX_QUERY_MEMORY_PER_NODE_KEY</code></a> value is closest to |
| the max memory on a node required by the query. It tries to find a pool whose value for MAX_QUERY_MEMORY_PER_NODE |
| is equal to queries max memory per node requirement. If there is no such pool then find the pool with config value |
| just greater than queries max memory per node. Otherwise find a pool with config value just less than queries |
| max memory per node. |
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