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Comparison of Redis version numbers

Comparison of Redis version numbers

Methods to view Redis version numbers include: using the command line tools redis-cli, Redis INFO commands, Redis manager, and environment variables. redis-cli --version is suitable for local and remote instances, while redis-cli info | grep redis_version provides more information, but only for local instances. Redis Manager provides a graphical interface, but requires third-party tools. The environment variable echo $REDIS_VERSION is useful in specific environments such as Docker.

Apr 10, 2025 pm 04:00 PM
redis docker
Why do you need to know the Redis version number

Why do you need to know the Redis version number

Understanding Redis version numbers is critical because it is related to compatibility, security, performance optimization, bug fixes, and documentation: Ensure that your application is compatible with Redis versions. Identify and resolve security vulnerabilities. Optimize application performance and take advantage of new optimizations. Get bug fixes to improve application stability. Access specific versions of information and support resources.

Apr 10, 2025 pm 03:57 PM
redis 为什么
Redis version compatibility issues

Redis version compatibility issues

Redis version compatibility refers to the ability to communicate between different versions. Compatibility is divided into the following levels: Backward compatibility: The new server can handle old client commands. Upward compatibility: Old clients can connect to new servers, but may not be able to use new features. Fully compatible: Unlimited interactions in different versions. Compatibility is affected by protocol changes, data structure changes, and new features added. Compatibility issues can be avoided using unified versions, testing, and using compatibility libraries.

Apr 10, 2025 pm 03:54 PM
redis
How to view all keys in Redis

How to view all keys in Redis

Methods to view all keys in Redis include: matching the Key name with the KEYS command; iterating over all keys with the SCAN command; dumping and restoring the Key values ​​with the DUMP and RESTORE commands; browsing the Key using the RedisInsight tool; using the CLUSTER KEYSLOT and CLUSTER GETKEYSINSLOT commands for Redis clusters; using the Lua script to generate a table containing all keys.

Apr 10, 2025 pm 03:51 PM
redis
Redis View all key commands

Redis View all key commands

Redis's KEYS command can be used to view all keys: Command syntax: KEYS pattern Command parameters: pattern Specifies the wildcard patterns that can be used when searching for keys, such as * (arbitrary characters) and ? (single characters). Result: Returns a list of all keys that match the pattern. Example: KEYS * will return all keys. Tip: You can use the empty mode "*" to view all keys, or use the variable-length wildcard ":" to match any number of characters. Complexity: O(n), where n is the number of keys in the database.

Apr 10, 2025 pm 03:48 PM
redis
What is the function of Redis keys *  command

What is the function of Redis keys *  command

The Redis keys command finds all keys that match the specified pattern and uses wildcards to match. This command returns an array containing the matching key names.

Apr 10, 2025 pm 03:45 PM
redis
What are the risks of using keys * commands

What are the risks of using keys * commands

There are risks in using the keys * command, including: Performance impact: Scan the entire key space, causing the server to block. Memory consumption: Getting a list of all keys requires a lot of memory. Data Breach: Returns a list of all keys, including sensitive information. Other potential risks: timeout failure, key space changes lead to incomplete or inaccurate lists, and reduce server reliability.

Apr 10, 2025 pm 03:42 PM
redis 敏感数据
How to efficiently view all keys in Redis

How to efficiently view all keys in Redis

The most efficient way to view all keys in Redis is to use the KEYS command, which allows users to match keys through patterns. Other methods include the SCAN command, the DUMP command, and the INFO command. Best practices include using clear patterns, setting appropriate scan steps, and considering third-party tools.

Apr 10, 2025 pm 03:39 PM
redis
How to use scan command in Redis

How to use scan command in Redis

The SCAN command allows iterating over Redis key-value pairs. It uses cursors to track progress, supports pattern matching and specifies the number of key-value pairs returned per iteration. Use SCAN 0 to start iteration, and subsequent calls use the cursor that was returned last time. This command returns a cursor and an array containing the retrieved key-value pairs. SCAN is non-blocking and returns up to 1000 key-value pairs per iteration. Complete iteration needs to stop when the cursor becomes 0.

Apr 10, 2025 pm 03:36 PM
redis 键值对
How to iterate over all keys using the scan command

How to iterate over all keys using the scan command

By using the scan command, we can iterate over all keys in Redis by following the steps: The initial cursor is set to 0. Loops the SCAN 0 command to get the result set and a new cursor. The number of keys contained in each result set can be specified by the COUNT option. Use the new cursor as the first parameter of the SCAN command to get the next result set. Continue looping until the returned cursor is 0, indicating that there are no more results.

Apr 10, 2025 pm 03:33 PM
python redis
What are the advantages of scan commands compared to keys *

What are the advantages of scan commands compared to keys *

The advantages of scan command over keys * are: incremental result acquisition to avoid memory problems; use cursor marks to pause and restore processing; support filtering results and narrowing the return range; performance optimization, avoiding full scan at one time; continuous scanning, and real-time update of database changes.

Apr 10, 2025 pm 03:30 PM
区别
How to view keys for a specific pattern

How to view keys for a specific pattern

There are two ways to view keys for a specific pattern in Redis: iterate over the database using the SCAN command, returning the keys for matching patterns until the cursor is 0. Use the KEYS command to directly return the keys of all matching patterns.

Apr 10, 2025 pm 03:27 PM
redis
How to use the keys command to match the pattern

How to use the keys command to match the pattern

How to match patterns using the keys command? The keys command can search for keys for a specified pattern. The pattern supports wildcards: *: Match any character?: Match a single character [ and ]: Match characters in brackets\: Escape special characters The keys command also supports regular expression matching

Apr 10, 2025 pm 03:24 PM
How to use scan command to match mode

How to use scan command to match mode

The scan command can search for patterns in files. Syntax: scan [Options] Mode [File...]. Options include: -l (print line numbers only), -n (print line numbers and matching lines), -q (not print output), and -e (interpretation mode is an extended regular expression). The pattern can be a basic string, a regular expression, or an awk program. Steps: Open the terminal window, enter the scan command and press Enter.

Apr 10, 2025 pm 03:21 PM

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