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 |
✅ 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 |
✅ 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 |
✅ 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 |
✅ 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 |
✅ 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.MERGESTORE | ✅ Supported |
✅ Flexible & Annual ✅ Free & Fixed |
Merges multiple sketches and stores the combined sketch in a new key. |
| 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. |