Summary of working principle of memcachea 1. sharding principleWe don't say much nonsense, just look at the principle of memcache.First of all, Memcache solves the biggest problem: memory fragmentation problem with memory read multiple times.
As an excellent out-of-process cache, Memcache is often used in high concurrency system architectures. Here to talk about how to use the Telnet tool to view the Memcache health and its key management maintenance. Suppose memcache installation
I. Memcached INTRODUCTIONMemcached is a high-performance, distributed memory object caching system, generic in nature, but intended Speeding up Dynamic Web applications by alleviating database load.(developed by LiveJournal's Danga Interactive)#高性能,
Redis Purge DataOne of the places where Redis is better than memcache is that if memcache, I'm afraid I have to turn off the reboot. 1 Use CLIFLUSHDB to clear a database, Flushall erase the entire redis data. 2 using shell redis-cli keys "*" |
1.MEMCACHED:KV structure, stored in memory, can reduce the database access pressure, can also be used as a session server(1) Common commands-u Specify user-m specify memory size-D start|restart|stop-p Specify port, default 11211-N Minimum allocated
Keywords: Memcached PHP clientDisclaimer: This article is not original and is transferred from the Huawei Cloud Help Center's distributed cache Service (DCS) User Guide. Client Connection method is universal, so excerpt to share to everyone.PHP
When I use YII2 to build a website, I often get the following warning when I open the website:PHP warning:php startup:unable to load Dynamic Library '/usr/lib/php5/20121212/pdo_mysql.so '-/usr/lib/php5/20121212/p do_mysql.so:undefined
The weekend combing the next time to read some of the knowledge points, the process of progress not only to practice, but also to arrange more reading, thinking, summary.Only for the knowledge point of the list and simple description, a lot of
Ubuntu PHP basic environment configuration (including Memcached) first, it is natural to install Apache
Sudo apt-get install apache2
Then start the service
Sudo/etc/init. d/apache2 start
Then PHP
Sudo apt-get install libapache2-mod-php5 php5
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