[Redis] redis command Summary (2), redis command Summary

[Redis] redis command Summary (2), redis command Summary
Publish/subscribe pub/sub

Command Format	Time Complexity	Command description	Return Value
Publish channel message	O (N)	Sends the message to the specified channel.	Number of subscribers who receive the message
Subscribe channel [channel...]	O (N)	Subscribe to the information of a given Channel
Psubscribe pattern [pattern...]	O (N)	Subscribe to a channel in the specified mode
Unsubscribe channel [channel...]	O (N)	Unsubscribe to a specified channel
Punsubscribe pattern [pattern...]	O (N)	Unsubscribe to a channel in the specified mode

Transaction

Command Format	Time Complexity	Command description	Return Value
Watch Key [key...]	O (1)	Monitors one or more keys. If the key is changed by other commands before the transaction is executed, the transaction will be interrupted.	Always OK
Unwatch	O (1)	Disable the watch command to monitor all keys	Always OK
Multi	O (1)	Mark the start of a transaction block. Multiple commands in the transaction block will be put into a queue in sequence, and finally executed atomically by the exec command	Always OK
Discard	O (1)	Cancel the transaction and discard all commands in the transaction block.	Always OK
Exec	O (N)	Execute commands in all transaction Blocks	When the operation is interrupted, the null value nil is returned.

 

Script

 

Command Format	Time Complexity	Command description	Return Value
Eval script Numkeys Key [key...] Arg [arg...]	Depends on the situation	Execute a lua script
Evalsha sha1 Numkeys Key [key...] Arg [arg...]	Depends on the situation	Evaluate the scripts cached on the server based on the given shal verification code. You can use the script load command to cache scripts to the server. Other places of this command, such as the parameter input method, are the same as the eval command.
Script exists Script [script...]	O (N)	Check whether the script exists in the cache and does not understand the execution.	1 exists, 0 does not exist
Script flush	O (N)	Delete all scripts in the script Cache	Always Return OK
Script kill	O (1)	Terminate the currently executed script. This command takes effect only when the script has not executed any write operations.	Success OK, failed: Error Code
Script load script	O (N)	Load the specified lua script to the script cache.	Sha1 checksum of the given script

 

Connection

Command Format	Command description	Return Value
Auth password	The server verifies the given password. Get the password through get config requirepass
Ping	Check whether the server is running	Pong is returned successfully.
Select index	Switch to the given database. Database 0 is used by default.
Echo message	Print the given string, which is used for testing
Quit	Close current connection

 

Server

Command Format	Time Complexity	Command description	Return Value
Time	O (1)	Returns the current server time.	The first string is the current timestamp. The second string is the number of milliseconds that have elapsed in the first second.
Dbsize	O (1)	Returns the number of keys of the current database.	Quantity
Bgrewriteaof	O (N)	Asynchronously rewrite the aof file in the background to reflect the status of the current database	Feedback
Bgsave	O (N)	Asynchronously saves the data of the current database to the disk in the background. The client can use the LASTSAVE command to view related information and determine whether the BGSAVE command is successfully executed.	Feedback
Save	O (N)	Synchronously Save the data of the current database to the disk	OK is returned when the storage is successful.
Lastsave	O (1)	Returns the last timestamp when redis successfully saved the data to the disk.	A unix Timestamp
Slaveof host port	O (n) O (1)	Dynamically modify the replication function when redis is running. You can change the current server to the slave server of the specified server. If the current server is already a slave server of a master server, running the slaveof host port will stop the current server from synchronizing the old master server and discard the old dataset, in turn, start to synchronize the new master server. O (n) If the command slaveof no one is executed on a slave server, the slave server will disable the replication function and switch from the slave server to the master server. The original synchronized dataset will not be discarded. O (1)	Always Return OK
Flushall		Clear the data of the entire redis server (delete all keys of all databases)	Always Return OK
Flushdb	O (1)	Clear all keys in the current database	Always Return OK
Shutdown		Stop all clients	An error is returned when execution fails. When the execution is successful, no information is returned. The connection between the server and the client is disconnected, and the client automatically exits.
Slowlog Subcommand [Argument]		Manage redis slow query logs
Info [section]	O (1)	Returns information about the redis server.
Config get Parameter		Get the Configuration Parameter Value
Config set Parameter value		Set the configuration parameter to a specified value.	If the setting is successful, OK is returned. Otherwise, an error is returned.
Config resetstat	O (1)	Reset some statistics in the info command	Always Return OK
Debug object key	O (1)	Obtain key debugging information
Debug segfault		Execute an invalid memory access. This means that the redis server crashes and is only used for debugging simulation during development.
Monitor		Prints the commands received by the redis server in real time.	Always Return OK
Sync		Internal commands for replication
Client list	O (N)	Obtains the list of connections from the client to the server.
Client kill ip: port	O (N)	Close the client with the ip Address: port	If the specified client exists and is closed successfully, OK is returned.
Client setname Connection-name	O (1)	Allocate a name for the current connection	If the setting is successful, OK is returned.
Client getname	O (1)	Return the client setname command to set the connection name	If no name is set for the connection, a blank reply is returned; If a name is set, a name is returned.

Obtains, sets, and controls client information.	Client list, client getname; Clent kill; client setname, shutdown
Obtain the server information	Info, config get, time, dbsize Config set, config resetstat,
Debugging	Debug object, debug setfault, monitor
Persistence	Bgrewriteaof, bgsave, save, lastsave,
Delete database key	Flushall, flushdb
Master/Slave Server Control	Slaveof