Gang Cheng chenggangpro

Docker Hub 镜像加速器

国内从 Docker Hub 拉取镜像有时会遇到困难，此时可以配置镜像加速器。Docker 官方和国内很多云服务商都提供了国内加速器服务。

Dockerized 实践 https://github.com/y0ngb1n/dockerized

Ubuntu 16.04+、Debian 8+、CentOS 7+

CLH 是一种基于链表的可扩展，高性能，公平的自旋锁，申请线程只能在本地变量上自旋，它会不断轮询前驱的状态，如果发现前驱释放了锁就结束自旋。

public class CLHLock {

    public static class CLHNode{
        private volatile boolean isLocked = true;
    }

    // 尾部节点

MCS Spinlock 是一种基于链表的可扩展、高性能、公平的自旋锁，申请线程只在本地变量上自旋，直接前驱负责通知其结束自旋，从而极大地减少了不必要的处理器缓存同步的次数，降低了总线和内存的开销。

public class MCSLock {

    public static class MCSNode {
        volatile MCSNode next;
        volatile boolean isLocked = true;
    }

	/**
	* MIT License
	*
	* Copyright (c) 2024 Jerônimo Nunes Rocha
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is

	-- 计算1到100的累加的结果。
	WITH RECURSIVE t(n) AS ( //t为我们结果表，n为字段，可以只指定表明不指定字段
	VALUES (1) //递归的开始，此时可理解为t表字段n只有一条记录 1
	UNION ALL
	SELECT n+1 FROM t WHERE n < 100
	/*这里产生的结果为 2 ，此时t表的字段n有两条记录分别为1，2
	* 3
	* ...
	* 100
	*/

	set session optimizer_trace="enabled=on",end_markers_in_json=on;
	-- ⬇️可替换为要追踪的SQL语句
	SELECT dia_sku_id
	FROM (SELECT DISTINCT(sku_master_temp.dia_sku_id) AS dia_sku_id
	FROM sku_price_cleaned
	INNER JOIN (SELECT dia_sku_id
	FROM sku_master
	-- FORCE INDEX (index_sku_id_right)
	WHERE sku_master.category_clean IN ('FTW')
	AND sku_master.sub_category IN

	package com.vm.project.advertise.project;

	import com.aliyun.oss.OSSClient;
	import com.aliyun.oss.model.PutObjectRequest;
	import lombok.extern.slf4j.Slf4j;
	import org.apache.commons.lang3.exception.ExceptionUtils;
	import org.apache.poi.ss.usermodel.Workbook;
	import org.apache.poi.xssf.streaming.SXSSFWorkbook;

	import java.io.IOException;

	import java.util.concurrent.TimeUnit;
	import java.util.concurrent.atomic.AtomicBoolean;

	/**
	* @author evans
	* @date 2022/3/7
	* @since 1.0.0
	*/
	public class PetersonTests {

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048