[jira] Commented: (HDFS-621) Exposing MiniDFS and MiniMR clusters as a single process command-line
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https://issues.apache.org/jira/browse/HDFS-621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12755716#action_12755716
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Tsz Wo (Nicholas), SZE commented on HDFS-621:
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I guess you need a separated MAPREDUCE patch for MiniMR.
Exposing MiniDFS and MiniMR clusters as a single process command-line
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Key: HDFS-621
URL: https://issues.apache.org/jira/browse/HDFS-621
Project: Hadoop HDFS
Issue Type: New Feature
Components: test, tools
Reporter: Philip Zeyliger
Priority: Minor
It's hard to test non-Java programs that rely on significant mapreduce
functionality. The patch I'm proposing shortly will let you just type
bin/hadoop jar hadoop-hdfs-hdfswithmr-test.jar minicluster to start a
cluster (internally, it's using Mini{MR,HDFS}Cluster) with a specified number
of daemons, etc. A test that checks how some external process interacts with
Hadoop might start minicluster as a subprocess, run through its thing, and
then simply kill the java subprocess.
I've been using just such a system for a couple of weeks, and I like it.
It's significantly easier than developing a lot of scripts to start a
pseudo-distributed cluster, and then clean up after it. I figure others
might find it useful as well.
I'm at a bit of a loss as to where to put it in 0.21. hdfs-with-mr tests
have all the required libraries, so I've put it there. I could conceivably
split this into minimr and minihdfs, but it's specifically the fact that
they're configured to talk to each other that I like about having them
together. And one JVM is better than two for my test programs.
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[jira] Commented: (HDFS-621) Exposing MiniDFS and MiniMR clusters as a single process command-line
[
https://issues.apache.org/jira/browse/HDFS-621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12755743#action_12755743
]
Tsz Wo (Nicholas), SZE commented on HDFS-621:
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If you would, take a quick look to see how I use MiniMRCluster. Do you feel
I'm abusing the fact that hdfs-hdfswithmr-test exists?
No more mapreduce codes in hdfs, please. Having hdfs-with-mr in hdfs is a
mistake. It leads to a circular dependence. Indeed, we should move
hdfs-with-mr to mapreduce.
Exposing MiniDFS and MiniMR clusters as a single process command-line
-
Key: HDFS-621
URL: https://issues.apache.org/jira/browse/HDFS-621
Project: Hadoop HDFS
Issue Type: New Feature
Components: test, tools
Reporter: Philip Zeyliger
Assignee: Philip Zeyliger
Priority: Minor
Attachments: HDFS-621.patch
It's hard to test non-Java programs that rely on significant mapreduce
functionality. The patch I'm proposing shortly will let you just type
bin/hadoop jar hadoop-hdfs-hdfswithmr-test.jar minicluster to start a
cluster (internally, it's using Mini{MR,HDFS}Cluster) with a specified number
of daemons, etc. A test that checks how some external process interacts with
Hadoop might start minicluster as a subprocess, run through its thing, and
then simply kill the java subprocess.
I've been using just such a system for a couple of weeks, and I like it.
It's significantly easier than developing a lot of scripts to start a
pseudo-distributed cluster, and then clean up after it. I figure others
might find it useful as well.
I'm at a bit of a loss as to where to put it in 0.21. hdfs-with-mr tests
have all the required libraries, so I've put it there. I could conceivably
split this into minimr and minihdfs, but it's specifically the fact that
they're configured to talk to each other that I like about having them
together. And one JVM is better than two for my test programs.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
