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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4313) C++ client - Improve method of drillbit selection from cluster
Date Sat, 05 Mar 2016 01:37:40 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15181408#comment-15181408
] 

ASF GitHub Bot commented on DRILL-4313:
---------------------------------------

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

    https://github.com/apache/drill/pull/396#discussion_r55112200
  
    --- Diff: contrib/native/client/example/pooledConnections.cpp ---
    @@ -0,0 +1,300 @@
    +/*
    + * 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.
    + */
    +
    +#include <fstream>
    +#include <iostream>
    +#include <stdio.h>
    +#include <stdlib.h>
    +#include <boost/thread.hpp>
    +#include "drill/drillc.hpp"
    +
    +int nOptions=5;
    +
    +struct Option{
    +    char name[32];
    +    char desc[128];
    +    bool required;
    +}qsOptions[]= {
    +    {"query", "Query strings, separated by semicolons", true},
    +    {"connectStr", "Connect string", true},
    +    {"logLevel", "Logging level [trace|debug|info|warn|error|fatal]", false},
    +    {"numConnections", "Number of simultaneous connections", true},
    +    {"numIterations", "Number of iterations to run. Each query is sent to each connection
this many times", true}
    +};
    +
    +std::map<std::string, std::string> qsOptionValues;
    +
    +const char* exceptionInject="alter session set `drill.exec.testing.controls` = '{ \"injections\"
: [{ \"type\":\"exception\",\"siteClass\":\"org.apache.drill.exec.work.fragment.FragmentExecutor\",\"desc\":\"fragment-execution\",\"nSkip\":0,\"nFire\":1,\"exceptionClass\":\"java.lang.OutOfMemoryError\"}]}'";
    --- End diff --
    
    not valid; missing injection site in FragmentExecutor?


> C++ client - Improve method of drillbit selection from cluster
> --------------------------------------------------------------
>
>                 Key: DRILL-4313
>                 URL: https://issues.apache.org/jira/browse/DRILL-4313
>             Project: Apache Drill
>          Issue Type: Improvement
>            Reporter: Parth Chandra
>            Assignee: Parth Chandra
>             Fix For: 1.6.0
>
>
> The current C++ client handles multiple parallel queries over the same connection, but
that creates a bottleneck as the queries get sent to the same drillbit.
> The client can manage this more effectively by choosing from a configurable pool of connections
and round robin queries to them.



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