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Making the confidence configurable.

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This commit is contained in:
Robin Sommer 2013-08-31 10:23:00 -07:00
parent fb3ceae6d5
commit 295987c8d0
8 changed files with 49 additions and 40 deletions
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13
scripts/base/frameworks/sumstats/plugins/hll_unique.bro
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@ -4,8 +4,11 @@ module SumStats;
export {
redef record Reducer += {
## The threshold when we switch to hll
## The error margin for HLL.
hll_error_margin: double &default=0.01;
## The confidence for for HLL.
hll_confidence: double &default=0.95;
};
redef enum Calculation += {
@ -26,8 +29,9 @@ redef record ResultVal += {
# specialized bifs.
card: opaque of cardinality &optional;
# We need this in the compose hook.
# We need these in the compose hook.
hll_error_margin: double &optional;
hll_confidence: double &optional;
};
hook register_observe_plugins()
@ -36,8 +40,9 @@ hook register_observe_plugins()
{
if ( ! rv?$card )
{
rv$card = hll_cardinality_init(r$hll_error_margin);
rv$card = hll_cardinality_init(r$hll_error_margin, r$hll_confidence);
rv$hll_error_margin = r$hll_error_margin;
rv$hll_confidence = r$hll_confidence;
rv$hll_unique = 0;
}
@ -48,7 +53,7 @@ hook register_observe_plugins()
hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal)
{
local rhll = hll_cardinality_init(rv1$hll_error_margin);
local rhll = hll_cardinality_init(rv1$hll_error_margin, rv1$hll_confidence);
hll_cardinality_merge_into(rhll, rv1$card);
hll_cardinality_merge_into(rhll, rv2$card);