This procedure explains how to download and install the binary distribution on a Unix system.

Download ActiveMQ

Download the activemq zipped tarball file to the Unix machine, using either a browser or a tool, i.e., wget, scp, ftp, etc. for example:

http://mirrors.cnnic.cn/apache//activemq/5.14.0/apache-activemq-5.14.0-bin.tar.gz

Extract the files from the zipped tarball into a directory of your choice. For example:

cd [activemq_install_dir]
tar zxvf apache-activemq-5.14.0-bin.tar.gz 

Starting ActiveMQ

From a command shell, change to the installation directory and run ActiveMQ as a foregroud process:

cd [activemq_install_dir]/bin
./activemq console

From a command shell, change to the installation directory and run ActiveMQ as a daemon process:

cd [activemq_install_dir]/bin
./activemq start

Testing the Installation

1. Using the administrative interface
   Open the administrative interface
   URL: http://127.0.0.1:8161/ad

Install the Server

Install a recent version of Erlang.

yum install erlang

Download rabbitmq-server-generic-unix-3.6.5.tar.xz from the link below.
Contained in the tarball is a directory named rabbitmq_server-3.6.5. You should extract this into somewhere appropriate for application binaries on your system. The sbin directory will be found in this directory.

 wget http://www.rabbitmq.com/releases/rabbitmq-server/v3.6.5/rabbitmq-server-generic-unix-3.6.5.tar.xz
 tar Jxvf rabbitmq-server-generic-unix-3.6.5.tar.xz 
 mv rabbitmq_server-3.6.5/ /xxx/rabbitmq

Run RabbitMQ Server

Start the Server

sbin/rabbitmq-server

This displays a short banner message, concluding with the message “completed with [n] plugins.”, indicating that the RabbitMQ broker has been started successfully.

rabbitmq-server -detached

You can also start the server in “detached” mode with rabbitmq-server -detached, in which case the server process runs i

Configuring Memory Caching

You can significantly improve your ownCloud server performance with memory caching, where frequently-requested objects are stored in memory for faster retrieval.

There are two types of caches to use: a PHP opcode cache, which is commonly called opcache, and data caching for your Web server.

A PHP opcache stores compiled PHP scripts so they don’t need to be re-compiled every time they are called. PHP bundles the Zend OPcache in core since version 5.5, so you don’t need to install an opcache for PHP 5.5+.

Data caching is supplied by the Alternative PHP Cache, user (APCu) in PHP 5.5+, Memcached, or Redis.

add the appropriate entries to your config.php, and refresh your ownCloud admin page

#'memcache.local' => '\OC\Memcache\Redis',
'redis' => array(
     'host' => 'localhost',
     'port' => 6379,
      ),

编译安装php(enable-fpm)

./configure --prefix=/root/programs/php5.6 --with-libxml-dir=/usr --with-pdo-pgsql=/usr --with-pgsql=/usr --enable-mbstring=all --enable-zip --with-zlib --enable-xml --enable-sockets --with-mcrypt --with-bz2 --with-openssl --with-gd --with-curl -enable-maintainer-zts --with-config-file-path=/root/programs/php5.6/etc --with-freetype-dir --with-jpeg-dir --with-png-dir --enable-ftp --enable-fpm --disable-cgi --with-iconv  --enable-bcmath --enable-calendar --enable-exif --enable-libxml --with-xmlrpc --with-gettext --enable-pcntl --enable-sysvsem --enable-inline-optimization --enable-soap
make
make install
ln -s /root/programs/php5.6/bin/php /usr/bin/php
cp /root/sources/php-5.6.7/php.ini-production /root/programs/php5.6/etc/php.ini
#下载证书
wget https://curl.haxx.se/ca/cacert.pem
mv cacert.pem /root/programs/php5.6/cacert.pem
vi /root/programs/php5.6/etc/php.ini
date.timezone = Asia/Shanghai ​
openssl.cafile=/root/program

简介

Kafka is a distributed,partitioned,replicated commit logservice。它提供了类似于JMS的特性，但是在设计实现上完全不同，此外它并不是JMS规范的实现。kafka对消息保存时根据Topic进行归类，发送消息者成为Producer,消息接受者成为Consumer,此外kafka集群有多个kafka实例组成，每个实例(server)成为broker。无论是kafka集群，还是producer和consumer都依赖于zookeeper来保证系统可用性集群保存一些meta信息。

Topics/logs/consumer/Producer

一个Topic可以认为是一类消息，每个topic将被分成多个partition(区),每个partition在存储层面是append log文件。任何发布到此partition的消息都会被直接追加到log文件的尾部，每条消息在文件中的位置称为offset（偏移量），offset为一个long型数字，它是唯一标记一条消息。它唯一的标记一条消息。kafka并没有提供其他额外的索引机制来存储offset，因为在kafka中几乎不允许对消息进行“随机读写”。

对于consumer而言,它需要保存消费消息的offset,对于offset的保存和使用,有consumer来控制;当consumer正常消费消息时,offset将会”线性”的向前驱动,即消息将依次顺序被消费.事实上consumer可以使用任意顺序消费消息,它只需要将offset重置为任意值

kafka集群几乎不需要维护任何consumer和producer状态信息,这些信息有zookeeper保存;因此producer和consumer的客户端实现非常轻量级,它们可以随意离开,而不会对集群造成额外的影响.

partitions的设计目的有多个.最根本原因是kafka基于文件存储.通过分区,可以将日志内容分散到多个server上,来避免文件尺寸达到单机磁盘的上限,每个partiton都会被当前server(kafka实例)保存;可以将一个topic切分多任意多个partitions,来