memcache is a distributed cache system developed by Brad Fitzpatrick of LiveJournal, but is currently used by many websites to improve website access speed, especially for some large databases that require frequent access. The effect of improving website access speed is very significant.
The workflow of MemCache is as follows:
First check whether the client's request data is in memcached. If so, return the request data directly without any further processing to the database. Operation;
If the requested data is not in memcached, check the database, return the data obtained from the database to the client, and cache a copy of the data into memcached (the memcached client is not responsible and needs The program is clearly implemented);
Each time the database is updated, the data in memcached is updated to ensure consistency;
It is a very good choice to use memcahe to handle cache and PHP sessions. , this book will explain in detail the working principle, installation and PHP cache operation of memcahe.
The above is the detailed content of memcache cache and session. For more information, please follow other related articles on the PHP Chinese website!
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