redis commands common ll-old

LL   (list long format) - old version

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List keys - old version reference page (currently unused)

The usage is ll or ll pattern.
'll' lists all keys.
This command is available on Enterprise Server. (available regardless of use-sql yes/no)
The intent of this command: there is an 'ls' command, but it can be used only when 'use-sql yes' is set, and its many options are hard to remember, so it is often unused. This command shows the needed fields by default and keeps options simple.
Caution: like the 'keys' command, it full-scans all keys in the DB, so use it carefully.

Field description

• type: Shows the key's data type. Data types are string/list/set/zset/hash/stream.
• key: Shows the key.
• value: For string, shows the value; for other data types, shows the number of values.
• last_update_time: Shows when the key was created or last updated.
  This field is not in the open source version; it is managed in the Enterprise version.
• expire_time: Shows the expiration time if it was set with the expire command.

• * : Matches any characters: h*llo -> hllo, heeeello, etc
• ? : Matches one character: h?llo -> hallo, hello, hxllo, etc
• [alphabet] : Matches a character in the brackets: h[ae]llo -> hallo, hello
  
• [^e] : Matches any character except those in the brackets: h[^e]llo -> hallo, hbllo, ... but hello is excluded.
  
• [a-c] : Matches a character range in the brackets: h[a-c]llo -> hallo, hbllo, hcllo
• \ : To use the special characters above (*?[^]) as literals, prefix them with \.

Specify a data type

You can specify a data type to list only those keys. Available data types are string, list, set, zset, hash, and stream.

Specify 'type'

If you specify 'type', it shows each data type and the number of keys of that type.

Specify a sort option

• SORT/ASC/DESC: Sort by key. SORT/ASC is ascending, DESC is descending.

Syntax

LL   [pattern]   [string|list|set|zset|hash|stream|type]   [sort|asc|desc]

• Available since Enterprise version 7.5.0.
• Time complexity is O(N). N is the number of all keys in the database, not the number of keys returned.
• Like the 'keys' command, this command 'full scans' the DB and can affect server performance, so a limit is set with the redis.conf ll-max parameter.
  If the number of keys is greater than or equal to ll-max, the following message is shown and the keys are not listed.
  "If the number of keys is greater than ll-max, the 'll' command cannot be executed.
  To execute, modify the 'CONFIG SET ll-max number' command.
  The number of keys can be checked with the 'dbsize' command, and the 'll-max' value can be checked with the 'CONFIG GET ll-max' command."
  You can change the value with the 'CONFIG SET ll-max number' command.
  Use this command on development/test servers, and avoid it on production servers unless it is necessary.