CMS.INITBYPROB

Initializes a Count-Min Sketch to accommodate requested tolerances.

Parameters:

• key: The name of the sketch.
• error: Estimate size of error. The error is a percent of total counted items. This effects the width of the sketch.
• probability: The desired probability for inflated count. This should be a decimal value between 0 and 1. This effects the depth of the sketch. For example, for a desired false positive rate of 0.1% (1 in 1000), error_rate should be set to 0.001. The closer this number is to zero, the greater the memory consumption per item and the more CPU usage per operation.

Examples

redis> CMS.INITBYPROB test 0.001 0.01
OK

Redis Software and Redis Cloud compatibility

| Redis Software | Redis Cloud | <span style="min-width: 9em; display: table-cell">Notes</span> | |:----------------------|:-----------------|:------| | <span title="Supported">✅ Supported</span> | <span title="Supported">✅ Flexible & Annual</span> <span title="Supported">✅ Free & Fixed</nobr></span> | |

Return information

{{< multitabs id="cms-initbyprob-return-info" tab1="RESP2" tab2="RESP3" >}}

One of the following:

• [Simple string reply]({{< relref "/develop/reference/protocol-spec#simple-strings" >}}) OK if executed correctly.
• [Simple error reply]({{< relref "/develop/reference/protocol-spec#simple-errors" >}}) if the given key already exists.

-tab-sep-

One of the following:

• [Simple string reply]({{< relref "/develop/reference/protocol-spec#simple-strings" >}}) OK if executed correctly.
• [Simple error reply]({{< relref "/develop/reference/protocol-spec#simple-errors" >}}) if the given key already exists.

{{< /multitabs >}}