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https://issues.apache.org/jira/browse/TAJO-846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14011245#comment-14011245
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ASF GitHub Bot commented on TAJO-846:
-------------------------------------
Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/20#discussion_r13139322
--- Diff: tajo-core/src/main/java/org/apache/tajo/worker/TaskHistory.java
---
@@ -1,198 +0,0 @@
-/**
- * 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.
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- */
-
-package org.apache.tajo.worker;
-
-import org.apache.tajo.catalog.statistics.TableStats;
-import org.apache.tajo.util.FileUtil;
-
-import java.net.URI;
-import java.util.Collection;
-import java.util.Map;
-
-public class TaskHistory {
--- End diff --
Nowadays, I'm investigating the shuffle cost of Tajo, and TaskHistory and
FetcherHistory provide very useful information to me. In addition, they will be
useful for the detailed performance analysis.
Would you leave these classes as they are?
> Clean up the task history in woker
> ----------------------------------
>
> Key: TAJO-846
> URL: https://issues.apache.org/jira/browse/TAJO-846
> Project: Tajo
> Issue Type: Improvement
> Components: worker
> Affects Versions: 0.8.0, 0.9.0
> Reporter: Jinho Kim
> Assignee: Jinho Kim
>
> The task history currently store the thread in memory. it can’t store to
> other storage(hdfs, local file ..). It would be nice if task history separate
> from taskrunner
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