TOPK.INFO
Syntax
TOPK.INFO key
Time complexity: O(1)
ACL categories: @topk
Returns metadata about the Top-K data structure stored at key, including its configuration parameters.
The key must already exist (created via TOPK.RESERVE); otherwise, an error is returned.
Return
Array reply: A flat array of field-value pairs with the following fields:
k: The number of top items tracked.width: The number of counters per hash function row.depth: The number of hash function rows.decay: The probability decay factor.
Examples
dragonfly> TOPK.RESERVE topk 5 20 7 0.9
OK
dragonfly> TOPK.INFO topk
1) "k"
2) (integer) 5
3) "width"
4) (integer) 20
5) "depth"
6) (integer) 7
7) "decay"
8) "0.9"