Redis (1): Getting Started

to install Redis under Linux:
wget http://download.redis.io/redis-stable.tar.gz
Tax Xzf redis-stable.tar.gz
CD redis-stable
Make
After the installation is complete, you can see that there are many Redis-initiated files under/usr/local/bin, which are the Redis commands

To start Redis:
Redis-server [--port 6380] is followed by the option to specify the port to start

How to configure Redis to boot with the system:
1. In the Redis/redis-stable/utils folder, there is a Redis_init_script initialization script file that copies the file to the/etc/init.d folder. and change the file name to the Redis_ port number, and then modify the contents of the initialization script file,
Replace All ${redisport} with the port number just
2. Create two folders/etc/redis/var/redis/port number
3. Copy the redis.conf file in the Redis/redis-stable folder to the/etc/redis directory, and modify the file name to the port number. conf. and modify the following parameters:
Daemonize Yes
Pidfile/var/run/redis_ port number. PID
Port Port number
dir/var/redis/Port number
Now it's time to start Reids with the/etc/init.d/redis_ port number start.
4. Finally set up boot by the following command
sudo update-rc.d redis_ port number Defaults

Tips: Change the file belongs to user with sudo chown zyq redis.conf, rename directly with MV Redis.conf 6379.conf

To start the client:
REDIS-CLI [-H 127.0.0.1-p 6379] where you can omit the specified host address and port number
Of course, the client can also use the REDIS-CLI ping command to test if the host receives a response, and if the host is healthy, it returns a Pang

Tips:linux to see which program is consuming the port:
lsof-i[:p ORT]---if you omit the port number, it will all be listed.
If you want to find the corresponding thread by name, you can use
ps-a | grep "Redis"

tips: Completely remove threads based on thread ID:
Kill-9 PID

Tips:tar Command:
In general, compression is used TAR-ZCVF
The decompression was TAR-ZXVF.
Parameters:
-C: Create a compressed file parameter directive (the meaning of Create);
-x: Unlock the parameter instructions for a compressed file!
-T: View the files inside the Tarfile!
In particular, in the release of the parameters, c/x/t can only exist one! Cannot exist at the same time!
Because it is not possible to compress and decompress simultaneously.
-Z: Do you have the properties of gzip at the same time? i.e. do I need gzip compression?
-j: Do you have bzip2 properties at the same time? i.e. is it necessary to compress with bzip2?
-V: Files are displayed during compression! This is commonly used, but is not recommended for use in the background execution process!
-F: Use the file name, please note, after F to immediately answer the file name Oh! Don't add any more arguments!
For example, using "TAR-ZCVFP tfile sfile" is the wrong way to write

Redis Configuration:
Redis-server Startup In addition to specifying the port number at startup, you can also pass in the configuration file as a parameter:
Redis-server/path/to/redis.conf
The configuration parameters in the configuration file are overwritten by passing in a configuration entry with the same name through a startup parameter:
redis-server/path/to/redis.conf--loglevel Warning
Of course, Redis also supports the modification of some configuration items dynamically through the Config set command at run time:
Config set loglevel warning
The value of the corresponding configuration item can be obtained by Config get at this time

Multiple databases:
Redis is a dictionary-structured storage server, and in fact Redis provides multiple data dictionaries, each of which can be viewed as a separate database:
Each database is named after a 0-based increment, and Redis supports 16 databases by default, which can be modified by configuring parameter databases, which automatically selects the database after the client has established a connection with the server.
However, you can switch the database by using the Select command (0-15 by default with the No. 0 database), and the Flushall command clears the data for all databases an empty Redis instance consumes only about 1 m of memory and is very small

Redis (1): Getting Started