[
https://issues.apache.org/jira/browse/HBASE-12394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14191741#comment-14191741
]
Hadoop QA commented on HBASE-12394:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12678452/HBASE-12394.patch
against trunk revision .
ATTACHMENT ID: 12678452
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 8 new
or modified tests.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 checkstyle{color}. The applied patch does not increase the
total number of checkstyle errors
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:red}-1 lineLengths{color}. The patch introduces the following lines
longer than 100:
+ * See {@link
org.apache.hadoop.hbase.mapreduce.TableMultiRegionMapReduceUtil#convertScanToString(org.apache.hadoop.hbase.client.Scan)}
for more details.
+ * Overrides previous calls to {@link
org.apache.hadoop.hbase.client.Scan#addColumn(byte[], byte[])}for any families
in the
+ String regionPerMapper
=context.getConfiguration().get("hbase.mapreduce.scan.regionspermapper","1");
+ LOG.error("ERROR when parseInt: hbase.mapreduce.scan.regionspermapper
must be an integer ");
+ int
stopRegion=(i*regionPerMapperInt+regionPerMapperInt-1<keys.getFirst().length)?(i*regionPerMapperInt+regionPerMapperInt-1):(keys.getFirst().length-1);
+ InetSocketAddress isa = new
InetSocketAddress(location.getHostname(), location.getPort());
+ * This optimization is effective when there is a specific reasoning to
exclude an entire region from the M-R job,
+ * Useful when we need to remember the last-processed top record and revisit
the [last, current) interval for M-R processing,
+ * continuously. In addition to reducing InputSplits, reduces the load on
the region server as well, due to the ordering of the keys.
+ * Override this method, if you want to bulk exclude regions altogether from
M-R. By default, no region is excluded( i.e. all regions are included).
{color:green}+1 site{color}. The mvn site goal succeeds with this patch.
{color:green}+1 core tests{color}. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-rest.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-annotations.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//artifact/patchprocess/checkstyle-aggregate.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/11541//console
This message is automatically generated.
> Support multiple regions as input to each mapper in map/reduce jobs
> -------------------------------------------------------------------
>
> Key: HBASE-12394
> URL: https://issues.apache.org/jira/browse/HBASE-12394
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Affects Versions: 2.0.0, 0.98.6.1
> Reporter: Weichen Ye
> Attachments: HBASE-12394.patch
>
>
> For Hadoop cluster, a job with large HBase table as input always consumes a
> large amount of computing resources. For example, we need to create a job
> with 1000 mappers to scan a table with 1000 regions. This patch is to support
> one mapper using multiple regions as input.
>
> The following new files are included in this patch:
> TableMultiRegionInputFormat.java
> TableMultiRegionInputFormatBase.java
> TableMultiRegionMapReduceUtil.java
> *TestTableMultiRegionInputFormatScan1.java
> *TestTableMultiRegionInputFormatScan2.java
> *TestTableMultiRegionInputFormatScanBase.java
> *TestTableMultiRegionMapReduceUtil.java
>
> The files start with * are tests.
> In order to support multiple regions for one mapper, we need a new property
> in configuration--"hbase.mapreduce.scan.regionspermapper"
> This is an example,which means each mapper has 3 regions as input.
> <property>
> <name>hbase.mapreduce.scan.regionspermapper</name>
> <value>3</value>
> </property>
> This is an example for Java code:
> TableMultiRegionMapReduceUtil.initTableMapperJob(tablename, scan, Map.class,
> Text.class, Text.class, job);
>
>
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
