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https://issues.apache.org/jira/browse/HDFS-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16454947#comment-16454947
]
Hudson commented on HDFS-7240:
------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #14070 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/14070/])
HDFS-9920. Stop tracking CHANGES.txt in the HDFS-7240 feature branch. (omalley:
rev 2b387d622c1620a6256a68bd6871f67360b68b46)
* (delete) hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-7240.txt
HDFS-11953. Remove Guava v21 usage from HDFS-7240. Contributed by Xiaoyu
(omalley: rev e3591aeec08945aae0b6bf95919f6ec3f81290e0)
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HDFS-12515. Ozone: mvn package compilation fails on HDFS-7240. (omalley: rev
c14e8b17ec348e50c95d0164e08cd84cc900bef5)
* (edit) hadoop-mapreduce-project/hadoop-mapreduce-examples/pom.xml
Revert "HDFS-12515. Ozone: mvn package compilation fails on HDFS-7240.
(omalley: rev 42e248372cb04802d833e220b8f5aa41b051317d)
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HDFS-12719. Ozone: Fix checkstyle, javac, whitespace issues in HDFS-7240
(omalley: rev 740a06cdd78cd1af98855b452e85c918e295a095)
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HDFS-13415. Ozone: Remove cblock code from HDFS-7240. Contributed by (omalley:
rev ec6c8742e58809a649752692252555ffcfa70801)
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HDFS-13422. Ozone: Fix whitespaces and license issues in HDFS-7240 (omalley:
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> Scaling HDFS
> ------------
>
> Key: HDFS-7240
> URL: https://issues.apache.org/jira/browse/HDFS-7240
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Jitendra Nath Pandey
> Assignee: Jitendra Nath Pandey
> Priority: Major
> Attachments: HDFS Scalability and Ozone.pdf, HDFS Scalability-v2.pdf,
> HDFS-7240.001.patch, HDFS-7240.002.patch, HDFS-7240.003.patch,
> HDFS-7240.003.patch, HDFS-7240.004.patch, HDFS-7240.005.patch,
> HDFS-7240.006.patch, HDFS-7240.007.patch, HadoopStorageLayerSecurity.pdf,
> MeetingMinutes.pdf, Ozone-architecture-v1.pdf, Ozonedesignupdate.pdf,
> ozone_user_v0.pdf
>
>
> [^HDFS Scalability-v2.pdf] describes areas where HDFS does well and its
> scaling challenges and how to address those challenges. Scaling HDFS requires
> scaling the namespace layer and also the block layer. _This jira provides a
> new block layer, Hadoop Distributed Storage Layer (HDSL), that scales the
> block layer by grouping blocks into containers thereby reducing the
> block-to-location map and also reducing the number of block reports and their
> processing_
> _A scalable namespace can be put on top this scalable block layer:_
> * _HDFS-10419 describes how the existing NN can be modified to use the new
> block layer._
> * _HDFS-13074 also provides, as an_ *_interim_* _step; a scalable flat
> Key-Value namespace on top of the new block layer; while it does not provide
> the HDFS API, it does support the Hadoop FS APIs (Hadoop FileSystem,
> FileContext)._
>
> Old Description
> This jira proposes to add object store capabilities into HDFS.
> As part of the federation work (HDFS-1052) we separated block storage as a
> generic storage layer. Using the Block Pool abstraction, new kinds of
> namespaces can be built on top of the storage layer i.e. datanodes.
> In this jira I will explore building an object store using the datanode
> storage, but independent of namespace metadata.
> I will soon update with a detailed design document.
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