memcached

Memcache : Confusions

由 徘徊边缘 提交于 2019-12-18 09:24:46
问题 I am going to use memcache(not memcacheD) for my PHP application . I have few confusions . I found this wrapper class for memcache. 1)As on connect method it adds all servers to pull. If this is done on every single request wont it slow down the permanence cause of network latency ? 2)if there are 2 servers in a pool and one goes offline requests will still be made to offline server ? There is no other way to automatically remove offline server from memcache ? If not what does memcache.allow

I'm Confused with Memcache vs Memcached vs php5-memcache

由 独自空忆成欢 提交于 2019-12-18 08:59:10
问题 I followed the instruction in this tutorial on how to install nginx, php, and mysql including the php5-memcache. I'm wondering if I still need to install the memcache or memcached without the "php5" prefix . As of now my WordPress site is complaining the ff: The following memcached servers are not responding or not running: Page Cache: 127.0.0.1:11211. Database Cache: 127.0.0.1:11211. Object Cache: 127.0.0.1:11211. This message will automatically disappear once the issue is resolved. If it is

Memcached内存数据库群集

由 匆匆过客 提交于 2019-12-18 08:57:30
Memcached概述 一套开源的高性能分布式内存对象缓存系统 所有的数据都存储在内存中 支持任意存储类型的数据 提高网址访问的速度 Memcached缓存机制 当程序写入缓存数据请求时，Memcached的API接口将KEY输入路由算法模块路由到集群中的一台服务，之后由API接口与服务器进行通信，完成一次分布式缓存写入 Key索引建立在API中，值value数据存在后面的memcached中 Memcached分布式 要依赖于Memcached的客户端来实现 多个Memcached服务器是独立的 分布式数据如何存储是路由算法所决定 Memcached路由算法 求余数hash算法 先用key做hash运算的到一个整数，再去做hash算法，根据余数进行路由。不适合在动态变化的环境中 一致性hash算法 按照hash算法把对应key通过一定hash算法处理后映射形成一个首尾接闭合循环，然后通过使用与对象存储一样的hash算法将机器也映射到环中，顺时针方向计算将所有对象存储到离自己最近的机器中。适合在动态变化中使用 Memcached是danga.com（运营LiveJournal的技术团队）开发的一套分布式内存对象缓存系统，用于在动态系统中减少数据库负载，提升性能。关于这个东西，相信很多人都用过，本文意在通过对memcached的实现及代码分析，获得对这个出色的开源软件更深入的了解

WAMPSERVER php_memcache extension

由 白昼怎懂夜的黑 提交于 2019-12-18 06:14:39
问题 I have a copy of php_memcache.dll (from php_memcache-2.2.6-5.3-nts-vc9-x86.zip) which I have placed in my C:\wamp\bin\php\php5.3.5\ext folder. In WAMP I can see php_memcache in my extensions list, however whenever I start the extension I get the following warning: PHP Startup: Unable to load dynamic library 'C:/wamp/bin/php/php5.3.5/ext/php_memcache.dll' - The specified module could not be found. This does not happen for any other extension that I can turn on or off. Have tried moving php

WAMPSERVER php_memcache extension

由 淺唱寂寞╮ 提交于 2019-12-18 06:14:29
问题 I have a copy of php_memcache.dll (from php_memcache-2.2.6-5.3-nts-vc9-x86.zip) which I have placed in my C:\wamp\bin\php\php5.3.5\ext folder. In WAMP I can see php_memcache in my extensions list, however whenever I start the extension I get the following warning: PHP Startup: Unable to load dynamic library 'C:/wamp/bin/php/php5.3.5/ext/php_memcache.dll' - The specified module could not be found. This does not happen for any other extension that I can turn on or off. Have tried moving php

Design/Architecture: web-socket one connection vs multiple connections

由 瘦欲@ 提交于 2019-12-18 01:18:50
问题 During a designing of a client/server architecture, is there any advantage to multiplexing multiple WEBSOCKET connections from the same process to the server (i.e. sharing one connection) vs opening one WEBSOCKET connection per thread/session in the client (as is typically done when connecting to memcached or database servers.) I'm aware about the overhead associated with each connection (e.g. RAM ...). But expect to have less than 1K-10K at the most in each client side. Specific use case:

nginx+tomcat+msm实现seesion共享

由 人走茶凉 提交于 2019-12-17 22:32:31
说明 上一章节 nginx+tomcat+redis负载均衡,实现session共享 ，本次我们使用另一种方式来实现session会话共享，以及实现一套线上运行的环境， 重定提示 本次将重点列于 memcache、ansible 以及keepalived功能的实现上 实验环境 jdk: 8u141 tomcat: 8.5.30 * 2 nginx: 1.12.1 * 2 keepalived： yum memcache: yum * 2 ansible： yum IP地址： 192.168.172.129-134 总六台 第一次手动加简单的ansible，第二次直接用ansible其它的(学习中) 软件下载： memcached-session-manager 需要下载的包[memcached-session-manager-tc8-2.3.0、spymemcached-2.12.3、memcached-session-manager-2.3.0、msm-javolution-serializer-2.1.1,javolution-5.4.3.1] java 需要下载的包jdk-8u141-linux-x64 拓扑图 拓扑-实验说明   1、keepalived实现Nginx负载均衡高可用, keepalived实现服务高可用 将在本章节实现它；   2

php_memcache.dll for PHP 5.3

由 可紊 提交于 2019-12-17 21:57:07
问题 I recently setup a server using the latest version of XAMPP for Windows. With it came PHP 5.3. I'm now looking for a memcache.dll file that works with PHP 5.3 I've used some of the previous .dll files and recieved an error message: "PHP Startup: memcache: Unable t initialize module. Module compiled with module API=20060613 PHP compiled with module api=20090626 These options need to match" Any links to a PHP 5.3 memcache.dll file would be greatly appreciated. Thanks for the help! 回答1: If you

best place to clear cache when restarting django server

由 主宰稳场 提交于 2019-12-17 21:53:36
问题 I want memcached to be flushed on every restart/reload of django server. I use cherrypy for production and builtin server for development. I would add this to settings.py, right after CACHES: from django.core.cache import cache cache.clear() but it makes a recursive import: Error: Can't find the file 'settings.py' in the directory containing 'manage.py'. It appears you've customized things. You'll have to run django-admin.py, passing it your settings module. (If the file settings.py does

Memcached数据库群集

由 余生长醉 提交于 2019-12-17 20:14:32
Memcached概述 一套开源的高性能分布式内存对象缓存系统 所有的数据都存储在内存中 支持任意存储类型的数据 提高网址访问的速度 Memcached缓存机制 当程序写入缓存数据请求时，Memcached的API接口将KEY输入路由算法模块路由到集群中的一台服务，之后由API接口与服务器进行通信，完成一次分布式缓存写入 Key索引建立在API中，值value数据存在后面的memcached中 Memcached分布式 要依赖于Memcached的客户端来实现 多个Memcached服务器是独立的 分布式数据如何存储是路由算法所决定 Memcached路由算法 求余数hash算法 先用key做hash运算的到一个整数，再去做hash算法，根据余数进行路由。不适合在动态变化的环境中 一致性hash算法 按照hash算法把对应key通过一定hash算法处理后映射形成一个首尾接闭合循环，然后通过使用与对象存储一样的hash算法将机器也映射到环中，顺时针方向计算将所有对象存储到离自己最近的机器中。适合在动态变化中使用 Memcached是danga.com（运营LiveJournal的技术团队）开发的一套分布式内存对象缓存系统，用于在动态系统中减少数据库负载，提升性能。关于这个东西，相信很多人都用过，本文意在通过对memcached的实现及代码分析，获得对这个出色的开源软件更深入的了解
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