Returns the probabilistic cardinality of a HyperLogLog data structure, or of the merged HyperLogLog structures if more than 1 is provided (see pfadd).

[Redis documentation]

pfcount(keys, [options], callback)

Arguments Type Description
keys string List of HyperLogLog key identifiers
options JSON Object Optional parameters
callback function Callback


Option Type Description Default
queuable boolean Make this request queuable or not true

Callback Response

Returns an integer containing the aggregated probabilistic cardinality of HyperLogLog structures.


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String[] keys = new String[]{"key1", "key2", "..."};

kuzzle.memoryStorage.pfcount(keys, new ResponseListener<Long>() {
  public void onSuccess(int count) {
    // callback called once the action has completed

  public void onError(JSONObject error) {

Callback response:

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