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celeborn/docs/developers/worker.md
Fu Chen 516bdc7e08
[CELEBORN-877][DOC] Document on SBT 
### What changes were proposed in this pull request?

As title

### Why are the changes needed?

As title

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?

Manual test

Closes #1795 from cfmcgrady/sbt-docs.

Authored-by: Fu Chen <cfmcgrady@gmail.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>
2023-08-11 12:17:55 +08:00

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license
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at https://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Worker

The main functions of Celeborn Worker are:

  • Store, serve, and manage PartitionLocation data. See Storage
  • Traffic control through Back Pressure and Congestion Control. See Traffic Control
  • Support rolling upgrade through Graceful Shutdown
  • Support elasticity through Decommission Shutdown
  • Self health check

Celeborn Worker has four dedicated servers:

  • Controller handles control messages, i.e. ReserveSlots, CommitFiles, and DestroyWorkerSlots
  • Push Server handles primary input data, i.e. PushData and PushMergedData, and push related control messages
  • Replicate Server handles replica input data, it has the same logic with Push Server
  • Fetch Server handles fetch requests, i.e. ChunkFetchRequest, and fetch related control messages