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https://issues.apache.org/jira/browse/S4-137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757604#comment-13757604
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Mariano Valles commented on S4-137:
-----------------------------------
I worked on something related to this back on S4 0.4.
At that moment one of the alternatives was to use Redis as a checkpoint storage
mechanism.
https://github.com/s4/s4/blob/master/s4-core/src/main/java/org/apache/s4/ft/RedisStateStorage.java
I worked on creating an append-only file similar to the
DefaultFileSystemStateStorage but using one file instead of many. But this was
more a proof of concept implementation.
While doing this we also thought on using a Distributed File System such as NFS
or similar and just using the DefaultFileSystemStateStorage on this path. This
would improve the availability of the checkpoints.
> Add HDFS StateStorage for more reliable checkpoint saving
> ---------------------------------------------------------
>
> Key: S4-137
> URL: https://issues.apache.org/jira/browse/S4-137
> Project: Apache S4
> Issue Type: New Feature
> Affects Versions: 0.6
> Reporter: Kurtt.Lin
> Priority: Minor
> Labels: checkpoint
> Fix For: 0.7
>
> Original Estimate: 120h
> Remaining Estimate: 120h
>
> Currently DefaultFileSystemStateStorage is the only implementation for
> StateStorage. Should have a storage like HDFS to improve the reliability of
> the checkpoints' states. Some apps would benefit from this.
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