Github user pvillard31 commented on the issue:
https://github.com/apache/nifi/pull/2310
OK... So I've been doing some tests and it's working as I'd expect. The
only remark I have is in terms of performances: ingestion rate is very low (and
creating a lot of "dropped") but it might be explained because I'm running
everything locally (?).
For anyone interested to try this PR. I've been following the quick start
[here](http://druid.io/docs/0.11.0/tutorials/quickstart.html). And I've been
using this
[workflow](https://gist.github.com/pvillard31/29956e9d7292551f9e8328bb62cbeb6c).
(you'd need to update the ExecuteProcess processor to use the correct path
pointing to the quickstart script generating data)
Once data is ingested into Druid, I'm issuing requests to get top 25
servers from the metrics we are ingesting:
````json
{
"queryType" : "topN",
"dataSource" : "metrics",
"intervals" : ["2017-01-01/2017-12-31"],
"granularity" : "all",
"dimension" : "server",
"metric" : "count",
"threshold" : 25,
"aggregations" : [
{
"type" : "longSum",
"name" : "count",
"fieldName" : "count"
}
]
}
````
Result:
````shell
$ curl -L -H'Content-Type: application/json' -XPOST --data-binary
@quickstart/metrics.json http://localhost:8082/druid/v2/?pretty
[ {
"timestamp" : "2017-12-21T16:28:00.000Z",
"result" : [ {
"count" : 2518,
"server" : "www5.example.com"
}, {
"count" : 2505,
"server" : "www1.example.com"
}, {
"count" : 2494,
"server" : "www2.example.com"
}, {
"count" : 2467,
"server" : "www4.example.com"
}, {
"count" : 2466,
"server" : "www3.example.com"
} ]
} ]
````
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