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https://issues.apache.org/jira/browse/HDFS-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14609037#comment-14609037
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Jitendra Nath Pandey commented on HDFS-7240:
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[~john.jian.fang], thanks for review and comments
1) There is some work going on to support yarn for s3 (HADOOP-11262) by
[~thodemoor] and [~steve_l]]. We hope we can leverage that to support mapreduce
use case.
2) This will be part of hdfs natively, unlike hbase which is a separate
service. There is only one additional daemon needed (storage container manager)
only if ozone is deployed. Hdfs already supports multiple namespaces and
blockpools, we will leverage that work. This work will not impact hdfs
manageability in anyway. There will be some additional code in datanode to
support storage containers. In future, we hope to use containers to store hdfs
blocks as well for hdfs block-space scalability.
3) We will partition objects using hash partitioning and range partitioning.
The document already talks about hash partitioning, I will add more details for
range partition support. The small objects will also be stored in the
container. In the document I mentioned leveldbjni, but we are also looking at
rocksDB for container implementation to store objects in the container.
4) The containers will be replicated and kept consistent using data pipeline,
similar to hdfs blocks. The document talks about it at a high level. We will
update more details in the related jira.
> Object store in 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
> Attachments: Ozone-architecture-v1.pdf
>
>
> 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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