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https://issues.apache.org/jira/browse/HBASE-11339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14625655#comment-14625655
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Hadoop QA commented on HBASE-11339:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12745138/11339-master-v7.txt
against master branch at commit a3d30892b41f604ab5a62d4f612fa7c230267dfe.
ATTACHMENT ID: 12745138
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 102
new or modified tests.
{color:green}+1 hadoop versions{color}. The patch compiles with all
supported hadoop versions (2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.7.0)
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 protoc{color}. The applied patch does not increase the
total number of protoc compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:red}-1 checkstyle{color}. The applied patch generated
1896 checkstyle errors (more than the master's current 1873 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:
+ // Put some data 5 10, 15, 20 mb ok (this would be right below
protobuf default max size of 64MB.
+The utility `org.apache.hadoop.hbase.IntegrationTestIngestMOB` is provided to
assist with testing the MOB feature. The utility is run as follows:
+* `*threshold*` is the threshold at which cells are considered to be MOBs. The
default is 1 kB, expressed in bytes.
+* `*minMobDataSize*` is the minimum value for the size of MOB data. The
default is 512 B, expressed in bytes.
+* `*maxMobDataSize*` is the maximum value for the size of MOB data. The
default is 5 kB, expressed in bytes.
+Because there can be a large number of MOB files at any time, as compared to
the number of HFiles, MOB files are not always kept open. The MOB file reader
cache is a LRU cache which keeps the most recently used MOB files open. To
configure the MOB file reader's cache on each RegionServer, add the following
properties to the RegionServer's `hbase-site.xml`, customize the configuration
to suit your environment, and restart or rolling restart the RegionServer.
+Next, add the HBase install directory, _`$HBASE_HOME`/*_, and HBase library
directory to _yarn-site.xml_ Adjust this example to suit your environment.
+ public static void mergeDelimitedFrom(Message.Builder builder, InputStream
in) throws IOException {
+ .addCounter(Interns.info(CELLS_COUNT_COMPACTED_FROM_MOB,
CELLS_COUNT_COMPACTED_FROM_MOB_DESC),
+ .addCounter(Interns.info(CELLS_SIZE_COMPACTED_FROM_MOB,
CELLS_SIZE_COMPACTED_FROM_MOB_DESC),
{color:green}+1 site{color}. The mvn post-site goal succeeds with this patch.
{color:red}-1 core tests{color}. The patch failed these unit tests:
org.apache.hadoop.hbase.util.TestProcessBasedCluster
org.apache.hadoop.hbase.mapreduce.TestImportExport
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/14761//testReport/
Release Findbugs (version 2.0.3) warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/14761//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/14761//artifact/patchprocess/checkstyle-aggregate.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/14761//console
This message is automatically generated.
> HBase MOB
> ---------
>
> Key: HBASE-11339
> URL: https://issues.apache.org/jira/browse/HBASE-11339
> Project: HBase
> Issue Type: Umbrella
> Components: regionserver, Scanners
> Affects Versions: 2.0.0
> Reporter: Jingcheng Du
> Assignee: Jingcheng Du
> Fix For: hbase-11339
>
> Attachments: 11339-master-v3.txt, 11339-master-v4.txt,
> 11339-master-v5.txt, 11339-master-v6.txt, 11339-master-v7.txt, HBase MOB
> Design-v2.pdf, HBase MOB Design-v3.pdf, HBase MOB Design-v4.pdf, HBase MOB
> Design-v5.pdf, HBase MOB Design.pdf, MOB user guide.docx, MOB user
> guide_v2.docx, MOB user guide_v3.docx, MOB user guide_v4.docx, MOB user
> guide_v5.docx, hbase-11339-150519.patch, hbase-11339-in-dev.patch,
> hbase-11339.150417.patch, merge-150212.patch, merge.150212b.patch,
> merge.150212c.patch, merge.150710.patch
>
>
> It's quite useful to save the medium binary data like images, documents
> into Apache HBase. Unfortunately directly saving the binary MOB(medium
> object) to HBase leads to a worse performance since the frequent split and
> compaction.
> In this design, the MOB data are stored in an more efficient way, which
> keeps a high write/read performance and guarantees the data consistency in
> Apache HBase.
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