nodetool setcachekeystosave

Sets the global number of keys saved by each cache for faster post-restart warmup.

Overrides the configured value of the row_cache_keys_to_save parameter in cassandra.yaml.

To change the current setting, use nodetool setcachekeystosave.

Synopsis

nodetool [<connection_options>] setcachekeystosave
<key-cache-keys-to-save> <row-cache-keys-to-save> <counter-cache-keys-to-save>

Syntax conventions Description

Syntax conventions	Description
UPPERCASE	Literal keyword.
Lowercase	Not literal.
<`Italics>`	Variable value. Replace with a valid option or user-defined value.
`[ ]`	Optional. Square brackets ( `[ ]` ) surround optional command arguments. Do not type the square brackets.
`( )`	Group. Parentheses ( `( )` ) identify a group to choose from. Do not type the parentheses.
`\|`	Or. A vertical bar ( `\|` ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.
`...`	Repeatable. An ellipsis ( `...` ) indicates that you can repeat the syntax element as often as required.
`'<Literal string>'`	Single quotation ( `'` ) marks must surround literal strings in CQL statements. Use single quotation marks to preserve upper case.
`{ <key>:<value> }`	Map collection. Braces ( `{ }` ) enclose map collections or key value pairs. A colon separates the key and the value.
`<<datatype1>,<datatype2>>`	Set, list, map, or tuple. Angle brackets ( `< >` ) enclose data types in a set, list, map, or tuple. Separate the data types with a comma.
`cql_statement;`	End CQL statement. A semicolon ( `;` ) terminates all CQL statements.
`[ -- ]`	Separate the command line options from the command arguments with two hyphens ( `--` ). This syntax is useful when arguments might be mistaken for command line options.
`' <<schema> ... </schema> >'`	Search CQL only: Single quotation marks ( `'` ) surround an entire XML schema declaration.
`@<xml_entity>='<xml_entity_type>'`	Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrconfig files.

UPPERCASE

Literal keyword.

Lowercase

Not literal.

<`Italics>`

Variable value. Replace with a valid option or user-defined value.

[ ]

Optional. Square brackets ( [ ] ) surround optional command arguments. Do not type the square brackets.

( )

Group. Parentheses ( ( ) ) identify a group to choose from. Do not type the parentheses.

|

Or. A vertical bar ( | ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.

...

Repeatable. An ellipsis ( ... ) indicates that you can repeat the syntax element as often as required.

'<Literal string>'

Single quotation ( ' ) marks must surround literal strings in CQL statements. Use single quotation marks to preserve upper case.

{ <key>:<value> }

Map collection. Braces ( { } ) enclose map collections or key value pairs. A colon separates the key and the value.

<<datatype1>,<datatype2>>

Set, list, map, or tuple. Angle brackets ( < > ) enclose data types in a set, list, map, or tuple. Separate the data types with a comma.

cql_statement;

End CQL statement. A semicolon ( ; ) terminates all CQL statements.

[ -- ]

Separate the command line options from the command arguments with two hyphens ( -- ). This syntax is useful when arguments might be mistaken for command line options.

' <<schema> ... </schema> >'

Search CQL only: Single quotation marks ( ' ) surround an entire XML schema declaration.

@<xml_entity>='<xml_entity_type>'

Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrconfig files.

Definition

The short- and long-form options are comma-separated.

Connection options

-h, --host hostname: The hostname or IP address of a remote node or nodes. When omitted, the default is the local machine.
-p, --port jmx_port: The JMX port number.
-pw, --password jmxpassword: The JMX password for authenticating with secure JMX. If a password is not provided, you are prompted to enter one.
-pwf, --password-file jmx_password_filepath: The filepath to the file that stores JMX authentication credentials.
-u, --username jmx_username: The username for authenticating with secure JMX.

Command arguments

counter-cache-keys-to-save

Counter cache capacity in MB units.

number - the number of keys saved by each cache
0 - disable counter caching and save all keys.

key-cache-keys-to-save

Corresponds to the key_cache_keys_to_save (deprecated) parameter in cassandra.yaml.

number - the number of keys saved by each cache
0 - disable counter caching and save all keys.

Default: 0 (disabled, meaning all keys will be saved)

row-cache-keys-to-save

Corresponds to the row_cache_keys_to_save parameter in cassandra.yaml.

number - the number of keys saved by each cache
0 - disable counter caching

Default: 0 (disabled).

Examples

Set the global number of keys to 2147483647, row cache to 1073741824, and counter cache to 2147483647

nodetool setcachekeystosave 2147483647 1073741824 2147483647

Ensure cache keys to save were updated.

nodetool getcachekeystosave

Results

Key cache keys to save: 2147483647
Row cache keys to save: 1073741824
Counter cache keys to save: 2147483647

nodetool setcachekeystosave

Synopsis

Definition

Connection options

Command arguments

Examples

Set the global number of keys to 2147483647, row cache to 1073741824, and counter cache to 2147483647

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