# Rollups and ILM
**URL:** https://discuss.elastic.co/t/rollups-and-ilm/214555
**Category:** Elasticsearch
**Created:** [January 10, 2020, 7:57am UTC](https://discuss.elastic.co/t/rollups-and-ilm/214555 "2020-01-10T07:57:25Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@RichardH](https://discuss.elastic.co/u/RichardH)
#### Post date: [January 10, 2020, 7:57am UTC](https://discuss.elastic.co/t/rollups-and-ilm/214555/1 "2020-01-10T07:57:25Z")
Hi All,
A bit of a newbie question.
Am I correct in my understanding that Rollups do not delete any data. They just create new aggregate/summary indexes. I would need to set up ILM to delete old granular data from the original indices after rollup?
Then, when configuring rollups. If I set the latency buffer to 7d does that mean it only performs rollups on data older than 7 days?
The time bucket size under Date Histogram - does this set the granularity of the rolled up data. ie. if set to 60m the rolled up data will include 1 hour averages of the metrics selected. Is this correct?
Or should I be working with the Histogram interval width setting to control this? (or is it both)?
Metrics selects the metrics I want to collect.
So if (using the Rollups configuration in Kibana) I select:
```
"Latency buffer (optional)" = 7d.
"Time Bucket" size = 60m
A list of Monitoring metrics under "Histogram" (e.g. beats_stats.metrics.apm-
server.decoder.deflate.content-length) with a Histogram interval of 100
The same Monitoring metrics under "Metrics" (e.g. beats_stats.metrics.apm-
server.decoder.deflate.content-length) and select the "Average" check box
```
Would it then rollup all **Averages** in the chosen metrics that are older than 7d into 60min buckets?
I could then (assuming I don't want it anymore, set up the ILM policy on the original indexes to delete after 7 days.
Thanks
---
### Author:  [@spinscale](https://discuss.elastic.co/u/spinscale)
#### Post date: [January 10, 2020, 2:28pm UTC](https://discuss.elastic.co/t/rollups-and-ilm/214555/2 "2020-01-10T14:28:58Z")
regarding integration with index lifecycle management, you may want to follow this issue on github: [https://github.com/elastic/elasticsearch/issues/48003](https://github.com/elastic/elasticsearch/issues/48003)
---
### Author:  [@birko](https://discuss.elastic.co/u/birko)
#### Post date: [January 23, 2020, 4:51pm UTC](https://discuss.elastic.co/t/rollups-and-ilm/214555/3 "2020-01-23T16:51:28Z")
Hi Alexander,
so nowadays it's not possible to manage old rollup data with ILM? Do you have any proposal how to manage it without ILM effectively, please?
Thanks
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 20, 2020, 4:51pm UTC](https://discuss.elastic.co/t/rollups-and-ilm/214555/4 "2020-02-20T16:51:30Z")
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