Improve documentation and add a tuning guide and disable fallback fetch in the benchmarks. #275

	#
	# Copyright 2022- IBM Inc. All rights reserved
	# SPDX-License-Identifier: Apache2.0
	#
	name: CI
	on:
	pull_request:
	push:
	branches:
	- main
	tags:
	- v*

	jobs:
	Build:
	strategy:
	fail-fast: true
	matrix:
	include:
	- spark: 3.2.0
	scala: 2.12.15
	- spark: 3.2.0
	scala: 2.13.5
	- spark: 3.2.1
	scala: 2.12.15
	- spark: 3.2.1
	scala: 2.13.5
	- spark: 3.2.3
	scala: 2.12.15
	- spark: 3.2.3
	scala: 2.13.5
	- spark: 3.2.4
	scala: 2.12.15
	- spark: 3.2.4
	scala: 2.13.5
	- spark: 3.3.0
	scala: 2.12.15
	- spark: 3.3.0
	scala: 2.13.8
	- spark: 3.3.1
	scala: 2.12.15
	- spark: 3.3.1
	scala: 2.13.8
	- spark: 3.3.2
	scala: 2.12.15
	- spark: 3.3.2
	scala: 2.13.8
	- spark: 3.4.0
	scala: 2.12.17
	- spark: 3.4.0
	scala: 2.13.8
	runs-on: ubuntu-latest
	env:
	SPARK_VERSION: ${{ matrix.spark }}
	SCALA_VERSION: ${{ matrix.scala }}
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Setup JDK
	uses: actions/setup-java@v3
	with:
	distribution: temurin
	java-version: 11
	cache: sbt
	- name: Test Default Shuffle Fetch
	shell: bash
	if: startsWith(matrix.scala, '2.12.')
	run: \|
	sbt test
	- name: Test Spark Shuffle Fetch
	shell: bash
	if: startsWith(matrix.scala, '2.12.') && !startsWith(matrix.spark, '3.2.')
	env:
	USE_SPARK_SHUFFLE_FETCH: "true"
	run: \|
	sbt test
	- name: Package
	shell: bash
	run: \|
	rm -rf target
	sbt package
	sbt makePom
	- name: Upload to maven
	if: startsWith(github.ref, 'refs/tags/v')
	shell: bash
	run: ./.github/publish_maven.sh
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	- name: Upload release
	if: startsWith(github.ref, 'refs/tags/v')
	uses: softprops/action-gh-release@v1
	with:
	files: target/scala/.jar

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