DoubleFirstAggregatorFactory is not supported during ingestion for rollup

[beepupa]

version:0.20

[FrankChen021]

According to the doc,

(Double/Float/Long) First and Last aggregator cannot be used in ingestion spec, and should only be specified as part of queries.

But the web console DOES allow users to configure a metric aggregated as double/float/long first/last.

And from the current implementation of backend services, these aggregation are not supported.

I checked the history of code, and didn't find the reasons why these aggregators are not supported during ingestion for rollup.

Do you have more background information on this problem @gianm ?

[suneet-s]

@FrankChen021 there's some context in #7599 and #10332

The web console shouldn't offer these as options since they are not yet supported at ingestion time.

cc @vogievetsky

[FrankChen021]

@suneet-s I see. Are there any progress being made on long/double first/last ? If no, I'd like to take the chance to implement it.

[beepupa]

According to the doc,

(Double/Float/Long) First and Last aggregator cannot be used in ingestion spec, and should only be specified as part of queries.

But the web console DOES allow users to configure a metric aggregated as double/float/long first/last.

And from the current implementation of backend services, these aggregation are not supported.

I checked the history of code, and didn't find the reasons why these aggregators are not supported during ingestion for rollup.

Do you have more background information on this problem @gianm ?

Thank you for answering my question

[beepupa]

@FrankChen021 there's some context in #7599 and #10332

The web console shouldn't offer these as options since they are not yet supported at ingestion time.

cc @vogievetsky

Thank you for answering my question

[suneet-s]

@suneet-s I see. Are there any progress being made on long/double first/last ? If no, I'd like to take the chance to implement it.

@FrankChen021 I'm not aware of anyone working on these issues. Feel free to pick it up - I reviewed the implementation for StringFirst/Last, and would be happy to review these as well