BF.INFO

Returns usage information and properties of a specific bloom filter.

Info Fields

• CAPACITY - The number of unique items that would need to be added before a scale out occurs or (non scaling) before it rejects addition of unique items.
• SIZE - The number of bytes allocated by this bloom filter.
• FILTERS - Returns the number of sub filters contained within the bloom filter.
• ITEMS - The number of unique items that have been added to the bloom filter.
• ERROR - The false positive rate of the bloom filter.
• EXPANSION - The expansion rate of the bloom filter. Non scaling filters will have an expansion rate of nil.
• TIGHTENING - The tightening ratio of the bloom filter.
• MAXSCALEDCAPACITY - The maximum capacity that a scalable bloom filter can be expand to and reach before a subsequent scale out will fail.

For non-scaling filters, the TIGHTENING and MAXSCALEDCAPACITY fields are not applicable and will not be returned. When no optional fields are specified, all available fields for the given filter type are returned.

Examples

127.0.0.1:6379> BF.ADD key val
(integer) 1
127.0.0.1:6379> BF.INFO key
 1) Capacity
 2) (integer) 100
 3) Size
 4) (integer) 384
 5) Number of filters
 6) (integer) 1
 7) Number of items inserted
 8) (integer) 2
 9) Error rate
10) "0.01"
11) Expansion rate
12) (integer) 2
13) Tightening ratio
14) "0.5"
15) Max scaled capacity
16) (integer) 26214300
127.0.0.1:6379> BF.INFO key CAPACITY
(integer) 100