memcached

缓存技术在华为公有云环境中的挑战与应用

由 扶醉桌前 提交于 2019-12-24 12:41:09
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 12月1日，ACMUG & CRUG 2018 技术沙龙全国巡演第十站在西安举办。华为云中间件产品经理 Kevin 在会上带来了《缓存技术在华为公有云环境中的挑战与应用》主题演讲，为大家介绍和分享了 华为云分布式缓存服务（Distributed Cache Service，简称DCS） 的应用与挑战。 分享亮点 DCS缓存体系结构和使用模式 使用案例 DCS的挑战与探索 华为云分布式缓存服务DCS作为华为云中最受欢迎的服务之一，为用户提供即开即用、安全可靠、弹性扩容、便捷管理等的在线分布式缓存能力。以下是本次主题演讲的主要内容： DCS缓存体系结构和使用模式 目前华为云分布式缓存DCS提供了Redis、Memcached和内存数据网格等多款引擎，供开发者选择。华为云分布式缓存DCS除了提供通用缓存场景外，在以下模式上实现了突破： 边缓存 HTTP Session会话与复制 改变数据抓取 只通过分布式缓存写入数据库、处理分布式内存并行计算Map reduced 类SQL查询 最新发布的 华为云分布式缓存DCS2.0 重新定义了缓存架构，为用户提供性能更强劲、服务更可靠的分布式缓存服务，主要特点有： 1.8秒创建一个缓存实例 2.缓存操作300% faster（无缝HW、SW/OS集成） 3.按需扩展

Failed saving metadata to metadataCache

由 [亡魂溺海] 提交于 2019-12-24 11:28:18
问题 I did a lot digging around for a solution to this problem and was unable to come to a solution. Problem: I have a Zend Framework 1.10.7 application running on the terminal and through a web interface. When it is running over the web it works flawlessly but when I run it through command line it keeps giving me an error Notice: Failed saving metadata to metadataCache I looked at various other topics including Accessing the Zend Application Bootstrap _init Functions After Bootstrapping and I was

What's a suitable storage RDBMS,NoSQL, for caching web site responses?

由 為{幸葍}努か 提交于 2019-12-24 11:13:49
问题 We're in the process of building an internal, Java-based RESTful web services application that exposes domain-specific data in XML format. We want to supplement the architecture and improve performance by leveraging a cache store. We expect to host the cache on separate but collocated servers, and since the web services are Java/Grails, a Java or HTTP API to the cache would be ideal. As requests come in, unique URI's and their responses would be cached using a simple key/value convention, for

AWS S3 Url changing dynamically with django statics

由 老子叫甜甜 提交于 2019-12-24 10:45:06
问题 When I am serving static files from AWS S3 using the {%static %} template I get this type of url: https://elasticbeanstalk-eu-west-1-2548513.s3.amazonaws.com/css/7aa4edf0c543.css?Signature=lpSpJuyv55JwkjxGKnNVmfn5QKs%3D&Expires=1370880855&AWSAccessKeyId=AKIAIDOQ45S6OQCXGNYQ Well the signature changes everytime. So when I am using django_storages with offline compression the key for that file is changing everytime because its name is changing so I get the error: You have offline compression

Memcache + Mysqli Couldn't fetch mysqli_result

由 梦想与她 提交于 2019-12-24 08:05:37
问题 I'm trying to add some speed performance to a project I'm working on using memcache. However I'm having a problem with the following public function sql_query($query){ $memcache = new Memcache; $memcache->connect('localhost', 11211) or die ("Could not connect"); $memkey = md5($query); $get_result = $memcache->get($memkey); if ($get_result){ return $get_result; } else { $q = $this->mysqli->query($query); $memcache->set($memkey, $q, false, 120) or die ("Failed to save data at the server"); if (

Can't get cached items back from memcached?

由 风流意气都作罢 提交于 2019-12-24 07:54:45
问题 I just setup memcached on a ubuntu system i have on my network. Didn't change any options so everything is default. I think tried to connect to the server using Enyim. It doesn't fail but when i try to retrieve the items they are always null. I'm not much of a low level won't but i've been able to discern things from wireshark before so i decided to give it a try. I'haven't been able to discern anything but i noticed the first .Store() command i sent actually sent network packets to the

Tools to test/debug/fix PHP concurrency issues?

由 吃可爱长大的小学妹 提交于 2019-12-24 04:22:09
问题 I find myself doing some relatively advanced stuff with memcached in PHP. It's becoming a mental struggle to think about and resolve race conditions and concurrency issues caused by the lock-free nature of the cache. PHP seems pretty poor in tools when it comes to concurrency (threads, anyone?), so I wonder if there are any solutions out there to test/debug this properly. I don't want to wait until two users request two scripts that will run as parallel processes at the same time and cause a

using yii with memcache, error when one of two server fails

由 强颜欢笑 提交于 2019-12-24 03:08:07
问题 i have a problem with yii and storing data in memcache. For my application i use system.caching.CMemCache and the following config: 'servers' => array( 'server1' => array('host' => 'localhost', 'port' => 11211, 'weight' => 50), 'server2' => array('host' => '192.168.0.2', 'port' => 11211, 'weight' => 50) ), if memcache on both systems is running, everything is ok and the values get spread up on the servers. but if one server fails (or if i stop the memcache manually) the application throw

play framework 2.0 support memcached？

由 早过忘川 提交于 2019-12-24 02:16:32
问题 I read Play Framework 2.0 document,I don't any word about memcached.How can I use memcached in Play Framework 2.0? why disappear in 2.0, in 1.x ,it is so easy!!! 回答1: As already pointed out in the comments, the default implementation of the Cache API uses Ehcache. If you want to use memcached, you coult write your own Cache implementation, or you could use this one. 来源： https://stackoverflow.com/questions/9999204/play-framework-2-0-support-memcached

缓存数据库Memcached——安装及管理数据库操作

由 瘦欲@ 提交于 2019-12-24 01:51:48
一、Memcached 简介： （1）介绍： Memcached 是一个高性能的分布式内存对象缓存系统，用于动态Web应用以减轻数据库负载。它通过在内存中缓存数据和对象来减少读取数据库的次数，从而提高动态、数据库驱动网站的速度。Memcached基于一个存储键/值对的hashmap。其守护进程（daemon ）是用C写的，但是客户端可以用任何语言来编写，并通过memcached协议与守护进程通信。 （2）特点： memcached作为高速运行的分布式缓存服务器，具有以下的特点： 1、协议简单； 2、基于libevent的事件处理； 3、内置内存存储方式； 4、memcached不互相通信的分布式。 （3）存储方式： 为了提高性能，memcached中保存的数据都存储在memcached内置的内存存储空间中。由于数据仅存在于内存中，因此重启memcached、重启操作系统会导致全部数据消失。另外，内容容量达到指定值之后，就基于LRU(Least Recently Used)算法自动删除不使用的缓存。memcached本身是为缓存而设计的服务器，因此并没有过多考虑数据的永久性问题。 二、memcached数据库配置： 1、准备安装所需源码包 [root@localhost ~]# mkdir /mnt/tools [root@localhost ~]# mount.cifs //192
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