Date histogram fixed interval

Is it possible to specify a fixed interval for a date histogram
facet/aggregation? Here is what I mean by fixed:

Lets say that I created an aggregation that returned data for between a
certain time range. This could be for the last 24 hours, the last 30 days,
etc. Regardless of the time range, I would like to get exactly six buckets
of data regardless of the size of the time range.

So if the time range was for the last 24 hours, I would get a bucket for
each four hour period. If the time range were 30 days, I would get a bucket
for each 5 day period. Is it possible to specify something like this in the
date time histogram?

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Hi Jeremy,

It is not possible. One work-around could be to over request (for example
create per-minute buckets) and finally merge them to get the desired number
of buckets. I believe this is something that could be achieved through
https://github.com/elasticsearch/elasticsearch/issues/8110.

Another option could be to run two requests: a first one to figure the
min/max timestamps and a second one with an interval that would generate
the desired number of buckets.

On Mon, Oct 27, 2014 at 7:18 PM, jnortey jeremy.nortey@gmail.com wrote:

Is it possible to specify a fixed interval for a date histogram
facet/aggregation? Here is what I mean by fixed:

Lets say that I created an aggregation that returned data for between a
certain time range. This could be for the last 24 hours, the last 30 days,
etc. Regardless of the time range, I would like to get exactly six buckets
of data regardless of the size of the time range.

So if the time range was for the last 24 hours, I would get a bucket for
each four hour period. If the time range were 30 days, I would get a bucket
for each 5 day period. Is it possible to specify something like this in the
date time histogram?

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Adrien Grand

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