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https://issues.apache.org/jira/browse/HDFS-5851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13973379#comment-13973379
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Arpit Agarwal commented on HDFS-5851:
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Hi Eric,
Unlike Tachyon we won't deal with data regeneration or checkpointing, leaving
it to the application. We are still discussing use cases and this task got
pushed out due to the 2.4 release.
* No durability or replication guarantees.
* Lost files/blocks will be discarded.
* The application is responsible for timely checkpointing i.e. moving blocks to
persistent storage.
> Support memory as a storage medium
> ----------------------------------
>
> Key: HDFS-5851
> URL: https://issues.apache.org/jira/browse/HDFS-5851
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: 3.0.0
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
>
> Memory can be used as a storage medium for smaller/transient files for fast
> write throughput.
> More information/design will be added later.
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