YANGLiiN yangl

prometheus每个主机上启动node_exporter插件暴露主机基础监控cpu mem io

grafana 使用apache-pulsar-grafana-dashboard替换下"datasource": "{{ PULSAR_CLUSTER }}"中的{{ PULSAR_CLUSTER }}改成你的数据源名称，然后导入

管理工具常用 pulsar-manager pulsarctl pulsar-admin

prometheus 查看哪些已注册上来

修改其依赖zk下/bk-ledgers/cookies/10.206.128.154:3181中的journalDir&ledgerDirs，如下：

4
bookieHost: "10.206.128.158:3181"
journalDir: "/app/data/bookkeeper/journal"
ledgerDirs: "1\t/app/data/bookkeeper/ledgers"
instanceId: "dcbf9ead-9834-46a6-931c-cafd13ba4831"

分别修改journalDir&ledgerDirs目录下的的VERSION内容中的journalDir&ledgerDirs ，如下：

In terms of tools, thinking processes, setup... you really need to start by learning about TLA+. I couldn't explain how it changes your engineering mindset/workflow better than Leslie Lamport himself. So if you're interested in this kind of thing then I highly recommend watching the TLA+ video course by Leslie Lamport: https://www.youtube.com/channel/UCajiu4Cj_GHOX0if3Up-eRA. I personally had to watch it more than once to understand some points.

Leslie Lamport also wrote a book which has been helpful to me: https://lamport.azurewebsites.net/tla/book.html. The book will require a

只在当前项目生效

在项目build.gradle文件内修改/添加 repositories 配置

repositories {
    maven {
        url 'https://maven.aliyun.com/repository/public/'
    }
    maven {
 url 'https://maven.aliyun.com/repository/gradle-plugin/'

https://www.oracle.com/java/technologies/javase/8u-relnotes.html

https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html

JDK 8u202（含）及之前的版本都可以免费使用，之后的版本商业用途收费！

Important Oracle JDK License Update
The Oracle JDK License has changed for releases starting April 16, 2019.

	ClientResources.builder().ioThreadPoolSize(…).computationThreadPoolSize(…).eventExecutorGroup(...).build()

	EventExecutorGroup eventExecutorGroup = DefaultEventLoopGroupProvider.createEventLoopGroup(DefaultEventExecutorGroup.class,
	computationThreadPoolSize, threadFactoryProvider);
	/**
	* Create a new client that connects to the supplied uri with shared {@link ClientResources}.You need to shut down the
	* {@link ClientResources} upon shutting down your application. You can connect to different Redis servers but you must
	* supply a {@link RedisURI} on connecting.
	*
	* @param clientResources the client resources, must not be {@code null}.

	package com.sf.springbootstrap;

	import com.google.common.collect.Maps;
	import com.google.gson.Gson;
	import com.google.gson.GsonBuilder;
	import com.googlecode.aviator.*;
	import java.util.Map;
	import java.util.Set;
	import lombok.extern.slf4j.Slf4j;

	/**
	* Copyright (c) Dell Inc., or its subsidiaries. All Rights Reserved.
	*
	* Licensed 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
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*/
	package io.pravega.segmentstore.storage.impl.bookkeeper;

	interface QuorumCoverageSet {
	/**
	* Add a bookie to the result set.
	*
	* @param bookieIndexHeardFrom Bookie we've just heard from
	*/
	void addBookie(int bookieIndexHeardFrom, int rc);

	/**
	* check if all quorum in the set have had the action performed for it.