Kiu/VictoriaMetrics
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Add description for retention and how it works (#297)

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Alexander Danilov 2020-01-27 19:38:22 +03:00 committed by Aliaksandr Valialkin
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commit 1a3626bbe1
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README.md
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@ -95,6 +95,7 @@ Cluster version is available [here](https://github.com/VictoriaMetrics/VictoriaM
- [Federation](#federation)
- [Capacity planning](#capacity-planning)
- [High availability](#high-availability)
- [Retention](#retention)
- [Multiple retentions](#multiple-retentions)
- [Downsampling](#downsampling)
- [Multi-tenancy](#multi-tenancy)
@ -700,6 +701,12 @@ kill -HUP `pidof prometheus`
If you have Prometheus HA pairs with replicas `r1` and `r2` in each pair, then configure each `r1`
to write data to `victoriametrics-addr-1`, while each `r2` should write data to `victoriametrics-addr-2`.
### Retention
Metrics is stored in directories per month. Retention occurs on the first day of the new month.
In order to keep data according to `retentionPeriod` max disk usage is going to be `retentionPeriod` + 1 month.
For example if you have `retentionPeriod` set to 1, january data will be deleted at March 1st.
### Multiple retentions