The APIs for checkpointing are in branch-2, but support for the capacity scheduler and the MapReduce implementation are making their way through review.
As of now, the checkpointing is for the shuffle and reduce phases, only. Map checkpointing requires cooperation with the RecordReader (i.e., the symmetric operation to create an InputSplit from a RecordReader) which has not been implemented. -C On Thu, Jun 20, 2013 at 10:29 PM, 牛兆捷 <[email protected]> wrote: > https://issues.apache.org/jira/browse/YARN-45 support work-preserve > preemption > > Has the AM support container's state checkpoint now? > Does the checkpoint support map, shuffle and reduce phase? > > -- > *Sincerely,* > *Zhaojie* > * > *
