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https://issues.apache.org/jira/browse/HDDS-1452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16827159#comment-16827159
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Anu Engineer commented on HDDS-1452:
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I agree it is not orthogonal. I was thinking we can skip step one completely if
we do the second one. Since the code changes are exactly in the same place.
Most Object stores and file systems use Extend based allocation and writes.
Ozone would benefit from moving into some kind of extend based system. In fact,
it would be best if can allocate extents on SSD, keep the data in those extents
for 24 hours and move it to spinning disks later. This is similar to what ZFS
does, and you automatically get SSD caching. If you are writing to a a spinning
disk, all writes are sequential which increases the write speed.
> All chunk writes should happen to a single file for a block in datanode
> -----------------------------------------------------------------------
>
> Key: HDDS-1452
> URL: https://issues.apache.org/jira/browse/HDDS-1452
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Datanode
> Affects Versions: 0.5.0
> Reporter: Shashikant Banerjee
> Assignee: Shashikant Banerjee
> Priority: Major
> Fix For: 0.5.0
>
>
> Currently, all chunks of a block happen to individual chunk files in
> datanode. This idea here is to write all individual chunks to a single file
> in datanode.
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