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From laurentgo <...@git.apache.org>
Subject [GitHub] drill pull request: DRILL-4446: Support mandatory work assignment ...
Date Thu, 03 Mar 2016 02:38:03 GMT
Github user laurentgo commented on a diff in the pull request:

    https://github.com/apache/drill/pull/403#discussion_r54829083
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/planner/fragment/DistributionAffinity.java
---
    @@ -0,0 +1,61 @@
    +/**
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
    + * with the License.  You may obtain a copy of the License at
    + * <p/>
    + * http://www.apache.org/licenses/LICENSE-2.0
    + * <p/>
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.drill.exec.planner.fragment;
    +
    +/**
    + * Describes an operator's endpoint assignment requirements.
    + */
    +public enum DistributionAffinity {
    +  /**
    +   * No affinity to any endpoints. Operator can run on any endpoint.
    +   */
    +  NONE(0, SoftAffinityFragmentParallelizer.INSTANCE),
    +
    +  /**
    +   * Operator has soft distribution affinity to one or more endpoints. Operator performs
better when fragments are
    +   * assigned to the endpoints with affinity, but not a mandatory requirement.
    +   */
    +  SOFT(1, SoftAffinityFragmentParallelizer.INSTANCE),
    +
    +  /**
    +   * Hard distribution affinity to one or more endpoints. Fragments having the operator
must be scheduled on the nodes
    +   * with affinity.
    +   */
    +  HARD(2, HardAffinityFragmentParallelizer.INSTANCE);
    +
    +  private int level;
    --- End diff --
    
    should be final


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