liunx PHP installation redis extension method: 1. Check the redis version; 2. Download the installation package through the wget command and decompress the installation package through "tar zxf"; 3. Execute "cd redis -4.0.8/src make" to install redis.
linux installation redis
linux installation redis is very simple, the official website has an introduction.
Install redis:
1. Check the redis version first
2. Install redis
#2.1 下载安装包 wget http://download.redis.io/releases/redis-4.0.8.tar.gz #2.2 解压 tar zxf redis-4.0.8.tar.gz
1 is the downloaded installation package, 2 is the decompressed folder. Remember this file directory. I decompressed it under /root. The files in this redis directory will be used for subsequent startup
#2.3编译 cd redis-4.0.8/src make
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#2.4 新建redis文件夹 mkdir /usr/local/redis
<pre class='brush:php;toolbar:false;'>#2.5移动文件
cd redis-4.0.8/src
mv redis-server /usr/local/redis
mv redis-benchmark /usr/local/redis
mv redis-cli /usr/local/redis
cd ../
mv redis.conf /usr/local/redis</pre>
#2.6 启动redis cd /usr/local/redis ./redis-server #这个是以默认配置开启,配置文件redis.conf 开机自启要用到。
As shown in the picture above, start according to the configuration file, and it will prompt that the startup is successful.
Possible warnings:
WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
Solution:
vim /etc/sysctl.conf
Start another line and add:
net.core.somaxconn = 511
Save and exit
Then: sysctl -p
WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
Solution:
vim /etc/sysctl.conf
Newline add:
vm.overcommit_memory=1
Save and exit
sysctl -p
WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
Solution:
vim /etc/rc.local
Newline addition:
if test -f /sys/kernel/mm/transparent_hugepage/enabled; then echo never > /sys/kernel/mm/transparent_hugepage/enabled fi
Save and exit
Restart the system, restart the server:
reboot
Generally, a new server will have these three warnings when it first installs redis and then starts it.
#2.7 连接redis,进行测试 ./redis-cli set pandent 2018 get pandent
The setting and retrieval are normal, indicating that redis has been installed successfully.
The above is the detailed content of How to install redis extension in liunx php. For more information, please follow other related articles on the PHP Chinese website!

Redis is a NoSQL database that provides high performance and flexibility. 1) Store data through key-value pairs, suitable for processing large-scale data and high concurrency. 2) Memory storage and single-threaded models ensure fast read and write and atomicity. 3) Use RDB and AOF mechanisms to persist data, supporting high availability and scale-out.

Redis is a memory data structure storage system, mainly used as a database, cache and message broker. Its core features include single-threaded model, I/O multiplexing, persistence mechanism, replication and clustering functions. Redis is commonly used in practical applications for caching, session storage, and message queues. It can significantly improve its performance by selecting the right data structure, using pipelines and transactions, and monitoring and tuning.

The main difference between Redis and SQL databases is that Redis is an in-memory database, suitable for high performance and flexibility requirements; SQL database is a relational database, suitable for complex queries and data consistency requirements. Specifically, 1) Redis provides high-speed data access and caching services, supports multiple data types, suitable for caching and real-time data processing; 2) SQL database manages data through a table structure, supports complex queries and transaction processing, and is suitable for scenarios such as e-commerce and financial systems that require data consistency.

Redisactsasbothadatastoreandaservice.1)Asadatastore,itusesin-memorystorageforfastoperations,supportingvariousdatastructureslikekey-valuepairsandsortedsets.2)Asaservice,itprovidesfunctionalitieslikepub/submessagingandLuascriptingforcomplexoperationsan

Compared with other databases, Redis has the following unique advantages: 1) extremely fast speed, and read and write operations are usually at the microsecond level; 2) supports rich data structures and operations; 3) flexible usage scenarios such as caches, counters and publish subscriptions. When choosing Redis or other databases, it depends on the specific needs and scenarios. Redis performs well in high-performance and low-latency applications.

Redis plays a key role in data storage and management, and has become the core of modern applications through its multiple data structures and persistence mechanisms. 1) Redis supports data structures such as strings, lists, collections, ordered collections and hash tables, and is suitable for cache and complex business logic. 2) Through two persistence methods, RDB and AOF, Redis ensures reliable storage and rapid recovery of data.

Redis is a NoSQL database suitable for efficient storage and access of large-scale data. 1.Redis is an open source memory data structure storage system that supports multiple data structures. 2. It provides extremely fast read and write speeds, suitable for caching, session management, etc. 3.Redis supports persistence and ensures data security through RDB and AOF. 4. Usage examples include basic key-value pair operations and advanced collection deduplication functions. 5. Common errors include connection problems, data type mismatch and memory overflow, so you need to pay attention to debugging. 6. Performance optimization suggestions include selecting the appropriate data structure and setting up memory elimination strategies.

The applications of Redis in the real world include: 1. As a cache system, accelerate database query, 2. To store the session data of web applications, 3. To implement real-time rankings, 4. To simplify message delivery as a message queue. Redis's versatility and high performance make it shine in these scenarios.


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