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https://issues.apache.org/jira/browse/SAMZA-354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14120303#comment-14120303
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David Chen commented on SAMZA-354:
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The job-based approach is interesting and might be the easiest option for 
users. While KafkaCheckpointManager might be the most commonly used 
CheckpointManager, should we also provide a migration path for those who are 
using FileSystemCheckpointManager?

> Write tool to convert old-style checkpoint log to post-SAMZA-123 format
> -----------------------------------------------------------------------
>
>                 Key: SAMZA-354
>                 URL: https://issues.apache.org/jira/browse/SAMZA-354
>             Project: Samza
>          Issue Type: Task
>    Affects Versions: 0.8.0
>            Reporter: Jakob Homan
>            Assignee: David Chen
>
> After SAMZA-123, the checkpoint log has a new format (keyed entries 
> interspersed with statelog-partition mapping) and a new name.  It would be 
> simple to write a tool that would consume an old-style log and write out a 
> new-style log, using the GroupByPartition strategy.  This would allow 
> existing jobs to not lose checkpointing.



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