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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6584) Support Archival Storage
Date Wed, 17 Sep 2014 07:22:40 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14136889#comment-14136889
] 

Hadoop QA commented on HDFS-6584:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12669300/h6584_20140916.patch
  against trunk revision 0e7d1db.

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 24 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {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 core tests{color}.  The patch failed these unit tests in hadoop-common-project/hadoop-common
hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.crypto.random.TestOsSecureRandom

                                      The test build failed in hadoop-hdfs-project/hadoop-hdfs


    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/8051//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/8051//console

This message is automatically generated.

> Support Archival Storage
> ------------------------
>
>                 Key: HDFS-6584
>                 URL: https://issues.apache.org/jira/browse/HDFS-6584
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: balancer, namenode
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>         Attachments: HDFS-6584.000.patch, HDFSArchivalStorageDesign20140623.pdf, HDFSArchivalStorageDesign20140715.pdf,
archival-storage-testplan.pdf, h6584_20140907.patch, h6584_20140908.patch, h6584_20140908b.patch,
h6584_20140911.patch, h6584_20140911b.patch, h6584_20140915.patch, h6584_20140916.patch, h6584_20140916.patch
>
>
> In most of the Hadoop clusters, as more and more data is stored for longer time, the
demand for storage is outstripping the compute. Hadoop needs a cost effective and easy to
manage solution to meet this demand for storage. Current solution is:
> - Delete the old unused data. This comes at operational cost of identifying unnecessary
data and deleting them manually.
> - Add more nodes to the clusters. This adds along with storage capacity unnecessary compute
capacity to the cluster.
> Hadoop needs a solution to decouple growing storage capacity from compute capacity. Nodes
with higher density and less expensive storage with low compute power are becoming available
and can be used as cold storage in the clusters. Based on policy the data from hot storage
can be moved to cold storage. Adding more nodes to the cold storage can grow the storage independent
of the compute capacity in the cluster.



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