ericzhong

环境

CentOS 7.3
zookeeper-3.4.6 （该部署省略）

单机方式

ericzhong

安装

环境

CentOS 7.3
zookeeper-3.4.6
java-1.8.0-openjdk

ericzhong

方案

memcached 机器 N 台：m1、m2、...、mN

memcached 备份机 1 台：mbackup

magent 两台：用 keepalived 做 HA，两者的启动参数完全相同，即 N 台 memcached + 1 台备份。

如果任意一台 magent 宕机，会马上切换到另一台。

ericzhong

#!/bin/bash

announce () {
	[[ $verbose -eq 1 ]] && echo "$@"
	[[ ! -z $logfile ]] && echo "$@" >> "$logfile"
}


usage()
{

ericzhong

/*
  gcc -I/usr/local/Cellar/libevent/2.1.8/include/ -L/usr/local/Cellar/libevent/2.1.8/lib/ -levent libevent2-signal.c
  kill -s USR1 <PID>
*/

#include <stdio.h>
#include <signal.h>
#include <event2/event.h>

void cb_func(evutil_socket_t fd, short events, void *arg)

ericzhong

/*
brew install libevent
gcc -I/usr/local/Cellar/libevent/2.1.8/include/ -L/usr/local/Cellar/libevent/2.1.8/lib/ -levent libevent2-server.c

server$ ./a.out
client$ telnet 127.0.0.1 8000
*/

#include <event2/listener.h>
#include <event2/bufferevent.h>

ericzhong

/*
brew install libevent
gcc -I/usr/local/Cellar/libevent/2.1.8/include/ -L/usr/local/Cellar/libevent/2.1.8/lib/ -levent libevent2_timer.c
*/

#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <event2/event.h>

ericzhong

import java.util.Random;

class Counter implements Runnable { 
	static int n=0;

	public static void main(String[] args) { 
		Runnable r = new Counter();
		Thread t1 = new Thread(r, "Thread 1");
		Thread t2 = new Thread(r, "Thread 2");
		t1.start();

ericzhong

import java.util.Random;

class PrintChar implements Runnable { 
	private String ch;

	PrintChar(String str) { 
		this.ch=str.substring(0,1);
	} 

	public void run() { 

ericzhong

class ListMetaClass(type):
    def __new__(cls, name, bases, attrs):
        attrs['times'] = lambda self, n: self*n
        return type.__new__(cls, name, bases, attrs)

class MyList(list, metaclass=ListMetaClass):
    pass

l = MyList([1,2,3])
print(l.times(2))