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docs: add clarification of the retention filter usage (#5103)

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docs: add clarification of the retention filter usage

Updated documentation regarding retention filter usage if duration is set lower than
`-retentionPeriod` flag value.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
Co-authored-by: hagen1778 <roman@victoriametrics.com>
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Dmytro Kozlov 2023-10-02 17:17:16 +02:00 committed by Aliaksandr Valialkin
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docs/README.md
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@ -1688,9 +1688,10 @@ See [these docs](https://docs.victoriametrics.com/guides/guide-vmcluster-multipl
which allow configuring multiple retentions for distinct sets of time series matching the configured [series filters](https://docs.victoriametrics.com/keyConcepts.html#filtering)
via `-retentionFilter` command-line flag. This flag accepts `filter:duration` options, where `filter` must be
a valid [series filter](https://docs.victoriametrics.com/keyConcepts.html#filtering), while the `duration`
must contain valid [retention](#retention) for time series matching the given `filter`. If series doesn't match
any configured `-retentionFilter`, then the retention configured via [-retentionPeriod](#retention) command-line flag is applied to it.
If series matches multiple configured retention filters, then the smallest retention is applied.
must contain valid [retention](#retention) for time series matching the given `filter`.
The `duration` of the `-retentionFilter` must be lower or equal to [-retentionPeriod](#retention) flag value.
If series doesn't match any configured `-retentionFilter`, then the retention configured via [-retentionPeriod](#retention)
command-line flag is applied to it. If series matches multiple configured retention filters, then the smallest retention is applied.
For example, the following config sets 3 days retention for time series with `team="juniors"` label,
30 days retention for time series with `env="dev"` or `env="staging"` label and 1 year retention for the remaining time series:

8
docs/Single-server-VictoriaMetrics.md
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@ -430,7 +430,6 @@ vmselect requests stats via [/api/v1/status/tsdb](#tsdb-stats) API from each vms
This may lead to inflated values when samples for the same time series are spread across multiple vmstorage nodes
due to [replication](#replication) or [rerouting](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html?highlight=re-routes#cluster-availability).
## How to apply new config to VictoriaMetrics
VictoriaMetrics is configured via command-line flags, so it must be restarted when new command-line flags should be applied:
@ -1697,9 +1696,10 @@ See [these docs](https://docs.victoriametrics.com/guides/guide-vmcluster-multipl
which allow configuring multiple retentions for distinct sets of time series matching the configured [series filters](https://docs.victoriametrics.com/keyConcepts.html#filtering)
via `-retentionFilter` command-line flag. This flag accepts `filter:duration` options, where `filter` must be
a valid [series filter](https://docs.victoriametrics.com/keyConcepts.html#filtering), while the `duration`
must contain valid [retention](#retention) for time series matching the given `filter`. If series doesn't match
any configured `-retentionFilter`, then the retention configured via [-retentionPeriod](#retention) command-line flag is applied to it.
If series matches multiple configured retention filters, then the smallest retention is applied.
must contain valid [retention](#retention) for time series matching the given `filter`.
The `duration` of the `-retentionFilter` must be lower or equal to [-retentionPeriod](#retention) flag value.
If series doesn't match any configured `-retentionFilter`, then the retention configured via [-retentionPeriod](#retention)
command-line flag is applied to it. If series matches multiple configured retention filters, then the smallest retention is applied.
For example, the following config sets 3 days retention for time series with `team="juniors"` label,
30 days retention for time series with `env="dev"` or `env="staging"` label and 1 year retention for the remaining time series: