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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7834) cost model (RelOptCost) extends network cost and memory cost
Date Fri, 13 Oct 2017 08:40:02 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16203196#comment-16203196

ASF GitHub Bot commented on FLINK-7834:

GitHub user godfreyhe opened a pull request:


    [FLINK-7834] [table] cost model extends network cost and memory cost

    ## What is the purpose of the change
    *This pull request makes cost model (RelOptCost) extends network cost and memory cost*
    ## Brief change log
      - *The FlinkCost extends RelOptCost and adds network cost and memory cost*
      - *Updates DataSetCost*
      - *Adds getFlinkCostFactory method in TableEnvironment to get  specific FlinkCostFactory*
    ## Verifying this change
    This change is already covered by existing tests*
    ## Does this pull request potentially affect one of the following parts:
      - Dependencies (does it add or upgrade a dependency): (no)
      - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no)
      - The serializers: (no)
      - The runtime per-record code paths (performance sensitive): (no)
      - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing,
Yarn/Mesos, ZooKeeper: (no)
    ## Documentation
      - Does this pull request introduce a new feature? (yes)
      - If yes, how is the feature documented? (JavaDocs)

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/godfreyhe/flink FLINK-7834

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #4820
commit aea6c799391bfed62d27413c133eb1979040d188
Author: godfreyhe <godfreyhe@163.com>
Date:   2017-10-13T08:12:14Z

    [FLINK-7834] [table] cost model extends network cost and memory cost


> cost model (RelOptCost) extends network cost and memory cost
> ------------------------------------------------------------
>                 Key: FLINK-7834
>                 URL: https://issues.apache.org/jira/browse/FLINK-7834
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API & SQL
>            Reporter: godfrey he
> {{RelOptCost}} defines an interface for optimizer cost in terms of number of row processed,
CPU cost, and I/O cost. Flink is a distributed framework, network and memory are also two
important cost metrics which should be considered for optimizer. This feature is to extend

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