### What changes were proposed in this pull request? 1. Map side merge and push. 2. Support hadoop2 & 3. 3. Reduce in-memory merge. 4. Integrate LifecycleManager to RmApplicationMaster. ### Why are the changes needed? Ditto. ### Does this PR introduce _any_ user-facing change? NO. ### How was this patch tested? Cluster. I tested this PR on a cluster with a 4x 16 CPU 64G Mem 4ESSD cluster. Hadoop 2.8.5 1TB Terasort, 8400 mappers, 1000 reducers Celeborn 81min vs MR shuffle 89min   1GB wordcount, 8 mappers, 8 reducers Celeborn 35s VS MR shuffle 38s   Closes #1830 from FMX/CELEBORN-839. Lead-authored-by: mingji <fengmingxiao.fmx@alibaba-inc.com> Co-authored-by: Ethan Feng <fengmingxiao.fmx@alibaba-inc.com> Signed-off-by: zky.zhoukeyong <zky.zhoukeyong@alibaba-inc.com> |
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