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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXCORE-10) Enable non-affinity of operators per node (not containers)
Date Sat, 26 Mar 2016 02:18:25 GMT

    [ https://issues.apache.org/jira/browse/APEXCORE-10?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15212738#comment-15212738
] 

ASF GitHub Bot commented on APEXCORE-10:
----------------------------------------

Github user tweise commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-core/pull/250#discussion_r57507488
  
    --- Diff: engine/src/main/java/com/datatorrent/stram/ContainerRequestHandler.java ---
    @@ -0,0 +1,59 @@
    +/**
    + * 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
    + *
    + *   http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * 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 com.datatorrent.stram;
    +
    +import java.util.List;
    +import java.util.Map;
    +
    +import org.apache.commons.lang3.tuple.MutablePair;
    +import org.apache.hadoop.yarn.client.api.AMRMClient;
    +import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest;
    +
    +/**
    + * Handles creating container requests and reissuing them on timeout
    + *
    + */
    +public class ContainerRequestHandler
    +{
    +  protected static final int NUMBER_MISSED_HEARTBEATS = 30;
    +
    +  public void reissueContainerRequests(AMRMClient<ContainerRequest> amRmClient,
Map<StreamingContainerAgent.ContainerStartRequest, MutablePair<Integer, ContainerRequest>>
requestedResources, int loopCounter, ResourceRequestHandler resourceRequestor, List<ContainerRequest>
containerRequests, List<ContainerRequest> removedContainerRequests)
    +  {
    +    if (!requestedResources.isEmpty()) {
    +      // resourceRequestor.clearNodeMapping();
    --- End diff --
    
    remove comment


> Enable non-affinity of operators per node (not containers)
> ----------------------------------------------------------
>
>                 Key: APEXCORE-10
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-10
>             Project: Apache Apex Core
>          Issue Type: Task
>            Reporter: Amol Kekre
>            Assignee: Isha Arkatkar
>              Labels: roadmap
>
> The issue happens on cloud which provides virtual cores with software like Xen underneath.
In effect if CPU intensive operators land up on same node we have a resource bottleneck,
> Need to create an attribute that does the following
> - Operators A & B should not be on same node
> - Stram should use this attribute to try to get containers on different node
> It is understood that the user is making an explicit choice to use NIC instead of stream
local optimization



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