Probabilistic data structure commands

Lists probabilistic data structure commands and provides links to the command reference pages.

The following tables list probabilistic data structure commands. See the command links for more information about each command's syntax, arguments, and examples.

Bloom filter commands

Command Redis
Enterprise
Redis
Cloud
Description
BF.ADD ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds an item to the filter.
BF.EXISTS ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Checks if an item exists in the filter.
BF.INFO ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns information about a Bloom filter.
BF.INSERT ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds multiple items to a filter. If the key does not exist, it creates a new filter.
BF.LOADCHUNK ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Restores a Bloom filter previously saved with BF.SCANDUMP.
BF.MADD ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds multiple items to the filter.
BF.MEXISTS ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
For multiple items, checks if each item exists in the filter.
BF.RESERVE ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Creates a Bloom filter. Sets the false positive rate and capacity.
BF.SCANDUMP ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Starts an incremental save of a Bloom filter.

Cuckoo filter commands

Command Redis
Enterprise
Redis
Cloud
Description
CF.ADD ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds an item to a filter.
CF.ADDNX ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds an item to a filter only if the item does not already exist.
CF.COUNT ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns the probable number of times an item occurs in the filter.
CF.DEL ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Removes one instance of an item from the filter.
CF.EXISTS ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Checks if an item exists in the filter.
CF.INFO ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns information about a cuckoo filter.
CF.INSERT ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds multiple items to a filter. Optionally sets the capacity if the filter does not already exist.
CF.INSERTNX ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds multiple items to a filter if they do not already exist. Optionally sets the capacity if the filter does not already exist.
CF.LOADCHUNK ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Restores a cuckoo filter previously saved with CF.SCANDUMP.
CF.MEXISTS ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
For multiple items, checks if each item exists in the filter.
CF.RESERVE ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Creates a cuckoo filter and sets its capacity.
CF.SCANDUMP ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Starts an incremental save of a cuckoo filter.

Count-min sketch commands

Command Redis
Enterprise
Redis
Cloud
Description
CMS.INCRBY ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Increases item counts.
CMS.INFO ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns width, depth, and total count of the sketch.
CMS.INITBYDIM ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Initializes a count-min sketch to the specified dimensions (width and depth).
CMS.INITBYPROB ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Initializes a count-min sketch to allow the specified overestimation percent for the item count and the probability of overestimation.
CMS.MERGE ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Merges several sketches into one sketch.
CMS.QUERY ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns the count for one or more items in a sketch.

Top-k commands

Command Redis
Enterprise
Redis
Cloud
Description
TOPK.ADD ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds an item to the data structure.
TOPK.COUNT ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns probable item counts.
TOPK.INCRBY ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Increases the score of an item by the specified number.
TOPK.INFO ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns the number of required items (k), width, depth, and decay values.
TOPK.LIST ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns the keys of items in the top-k list. Optionally returns their item counts.
TOPK.QUERY ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Checks whether an item is one of top-k items.
TOPK.RESERVE ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Initializes a top-k with the specified number of top occurring items to keep, width, depth, and decay.

T-digest sketch commands

Command Redis
Enterprise
Redis
Cloud
Description
TDIGEST.ADD ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Adds one or more samples to a t-digest sketch.
TDIGEST.CDF ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Estimates the fraction of all observations which are less than or equal to the specified value.
TDIGEST.CREATE ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Allocates memory and initializes a t-digest sketch.
TDIGEST.INFO ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns information about the t-digest sketch.
TDIGEST.MAX ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns the maximum value from the sketch.
TDIGEST.MERGE ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Copies values from one sketch to another.
TDIGEST.MIN ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Returns the minimum value from the sketch.
TDIGEST.QUANTILE ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Estimates one or more cutoffs.
TDIGEST.RESET ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Resets the sketch and reinitializes it.
TDIGEST.TRIMMED_MEAN ✅ Supported

✅ Flexible & Annual
✅ Free & Fixed
Estimates the mean value from the sketch, excluding values outside the specified range.
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