zhengchenyu opened a new pull request, #1245:
URL: https://github.com/apache/incubator-uniffle/pull/1245
### What changes were proposed in this pull request?
Add new merger manager for remote spill.
### Why are the changes needed?
In a cloud scenario, the storage of the machine that performs the job is
very small. The merge phase often uses disk. The remote spill allows remote
shuffle service job to use as little disk as possible.
Fix: #1231
### Does this PR introduce _any_ user-facing change?
| config | description |
| --- | --- |
| tez.rss.reduce.remote.spill.enable | Whether to enable remote spill |
| tez.rss.remote.spill.storage.path | the remote spill path |
| rss.reduce.remote.spill.replication | the replication of remote fs |
| rss.reduce.remote.spill.retries | try times for remote fs |
### How was this patch tested?
unit test, integration test, tez examples on cluster.
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