Hi ES group,
i have a function score query, which searches for user profiles in a big
pool (~2 million documents). The query works fine, but the index contains a
lot more male profiles than female ones (around 100 times more). Now my
goal is to somehow specify a ratio of the gender distribution of the
result. For example i want to get 6 male and 4 female profiles at any time
I query the index. How could I force ES to ensure this ratio?
I tried a filter on the gender attribute inside the function score query
with a boost_factor but it didn't worked out. The result contains about 9
male and 1 female profile right now.
The query looks like the following (slightly stripped-down):
{
"query": {
"function_score": {
"boost_mode": "replace",
"score_mode": "sum",
"boost": 1,
"filter": {
// some hard filter, this shouldn't matter
},
"functions": [
{
"random_score": {
"seed": null
}
},
{
"boost_factor": 1,
"field_value_factor": {
"field": "gender",
"gender": "female"
}
},
{
"linear": {
"location": {
"origin": "", //some origin here
"scale": "50km",
"offset": "25km",
"decay": 0.25
}
}
},
{
"linear": {
"lastlogin": {
"origin": "2014-10-14",
"scale": "30d",
"offset": "1d",
"decay": 0.5
}
}
}
]
}
},
"from": 0,
"size": 10
}
Best regards,
Stefan
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