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From EronWright <...@git.apache.org>
Subject [GitHub] flink pull request #2315: [FLINK-1984] Integrate Flink with Apache Mesos (T1...
Date Wed, 17 Aug 2016 15:03:09 GMT
Github user EronWright commented on a diff in the pull request:

    --- Diff: flink-mesos/src/main/scala/org/apache/flink/mesos/scheduler/LaunchCoordinator.scala
    @@ -0,0 +1,349 @@
    + * 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 org.apache.flink.mesos.scheduler
    +import akka.actor.{Actor, ActorRef, FSM, Props}
    +import com.netflix.fenzo._
    +import com.netflix.fenzo.functions.Action1
    +import com.netflix.fenzo.plugins.VMLeaseObject
    +import grizzled.slf4j.Logger
    +import org.apache.flink.api.java.tuple.{Tuple2=>FlinkTuple2}
    +import org.apache.flink.configuration.Configuration
    +import org.apache.flink.mesos.scheduler.LaunchCoordinator._
    +import org.apache.flink.mesos.scheduler.messages._
    +import org.apache.mesos.Protos.TaskInfo
    +import org.apache.mesos.{SchedulerDriver, Protos}
    +import scala.collection.JavaConverters._
    +import scala.collection.mutable.{Map => MutableMap}
    +import scala.concurrent.duration._
    +  * The launch coordinator handles offer processing, including
    +  * matching offers to tasks and making reservations.
    +  *
    +  * The coordinator uses Netflix Fenzo to optimize task placement.   During the GatheringOffers
    --- End diff --
    Because Fenzo solves a hard problem (knapsack packing of Mesos tasks->offers) today
and nicely prepares the Mesos RM for future enhancement (task locality, etc).   @StephanEwen
was supportive.

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