memcached | 易学教程

memcached entry expiration set to 0

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问题 Does memcached entries with expiry time set to 0 not expire - as mentioned in the PHP Memcached docs, but not mentioned in the memcached protocol spec? I am using spymemcached client and the docs for spymemcached does not say anything about it either. 回答1: Setting expiration to 0 means the item has no expiration. Therefore it will never expire. 来源： https://stackoverflow.com/questions/22212647/memcached-entry-expiration-set-to-0

Coldfusion memcached connections

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问题 I'm trying to use http://www.flexablecoder.com/blog/index.cfm/memcached client. All works ok but for each cfm call, Coldfusion always open a new connection to the memcached server, not reusing an old one. Is there a way to reuse the memcached connections? 回答1: You need to initialize a singleton object, ie, only one instance of the memcached object. In application.cfc you can initialize in onApplicationStart method: <cfset application.memcachedFactory = CreateObject("component",

MHA部署

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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

Configure Fluent Nhibernate with NHibernate.Caches.MemCached

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问题 I am trying to configure Fluent NHibernate with MemCache but I get the following error. I am using MVC5+CastleWindsor+FluentNHibernate+UOW private static ISessionFactory CreateNhSessionFactory() { var connStr = System.Configuration.ConfigurationManager.ConnectionStrings["AESConnect"].ConnectionString; return Fluently.Configure() .Database(MsSqlConfiguration.MsSql2008.ConnectionString(connStr)) .Cache(c=>c.ProviderClass(typeof(NHibernate.Caches.MemCache.MemCacheProvider).AssemblyQualifiedName)

Redis for both data store (jobs) and fragment cache in Rails

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问题 I am already using Redis (with Redis Cloud on Heroku) as a data store for Resque to process my background jobs. I would like to add some fragment caching to my app. Questions: Do we need two separate instances of Redis to achieve this? One for the fragment caching (ephemeral data) and another for jobs (persistent data)? Or can the one Redis instances be configured to handle both scenarios? From a configuration and maintenance point of view, is it easier to simply have memcached for fragment

PHP memcached session not working

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问题 I started to use memcached for storing session files, but Session doesn't work and apache sends response too slow. How can I solve the problem? Modifications in php.in are: ;session.save_handler = files session.save_handler = memcached session.save_path = "tcp://127.0.0.1:11211?persistent=1&weight=1&timeout=1&retry_interval=15" 回答1: I solved the problem, Solution is connection url without tcp:// ,so session.save_path should be session.save_path = "127.0.0.1:11211?persistent=1&weight=1&timeout

Increment times out; set always succeeds after retry

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问题 I'm getting strange behavior in memcached, in particular, behavior that is strange in its consistency. Here is my test: @Test public void testMemc() { logger.info("Setting head."); memc.set(env.memcachedQueueKeys().head, 3600, 0); logger.info("Set head; incrementing."); memc.incr(env.memcachedQueueKeys().head, 1); logger.info("Incremented."); } And here is the output: 28 11:04:52.932 INFO; Setting head. 2014-01-28 11:04:52.933 WARN net.spy.memcached.MemcachedConnection: Could not redistribute

PHP Warning: A session is active. You cannot change the session module's ini settings at this time in /../

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问题 I created my custom PHP session handler and sometimes I get the PHP warning: PHP Warning: curl_exec(): A session is active. You cannot change the session module's ini settings at this time in This appear to be a randomic issue, and "curl_exe()" function is not the problem, since the function always changes when the error occures. The custom session handler saves sessions into memcache and OrientDB, I am sure memcache and orientdb don't have problems when the error occures because I have no

What steps are needed to implement memcached in a Django application?

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问题 I have my existing Django web application that uses a MySQLDB without memcaching. I would like to implement memcaching to improve the responsiveness of this site. I see the instructions here. However, these instructions leave me with some unanswered question(s). Is this all I need to do to get memcache working after I setup the memcached server? Or do I need to alter any of my code outside of settings.py? Does Django nicely handle all the memcaching operations behind the scenes for me

How to load memcached on PHP in Mac OS X Catalina?

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问题 I have tried virtually everything I could for the last 3 hours. I just don't seem to get it to load on PHP. I was able to install it via brew install memcached and successfully make run it as a background service via memcached -d . But that's not really what I am looking for. I am looking at loading it as one of my PHP modules. Running php -m on the terminal does not list memcached on it at all. Neither looking at phpinfo() or print_r(get_loaded_extensions()); on runtime gave me any luck. I