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docs: clarify that downsampling drops all the samples except the last one on every downsampling interval

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Aliaksandr Valialkin 2024-04-04 14:48:28 +03:00
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2
README.md
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@ -1980,7 +1980,7 @@ See how to request a free trial license [here](https://victoriametrics.com/produ
[VictoriaMetrics Enterprise](https://docs.victoriametrics.com/enterprise.html) supports multi-level downsampling via `-downsampling.period=offset:interval` command-line flag.
This command-line flag instructs leaving the last sample per each `interval` for [time series](https://docs.victoriametrics.com/keyconcepts/#time-series)
[samples](https://docs.victoriametrics.com/keyconcepts/#raw-samples) older than the `offset`. For example, `-downsampling.period=30d:5m` instructs leaving the last sample
per each 5-minute interval for samples older than 30 days, while the rest of samples aren't downsampled.
per each 5-minute interval for samples older than 30 days, while the rest of samples are dropped.
The `-downsampling.period` command-line flag can be specified multiple times in order to apply different downsampling levels for different time ranges (aka multi-level downsampling).
For example, `-downsampling.period=30d:5m,180d:1h` instructs leaving the last sample per each 5-minute interval for samples older than 30 days,

2
docs/Cluster-VictoriaMetrics.md
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@ -904,7 +904,7 @@ It is configured with `-downsampling.period` command-line flag according to [the
It is possible to downsample series, which belong to a particular [tenant](#multitenancy) by using [filters](https://docs.victoriametrics.com/keyConcepts.html#filtering)
on `vm_account_id` or `vm_project_id` pseudo-labels in `-downsampling.period` command-line flag. For example, the following config leaves the last sample per each minute for samples
older than one hour only for [tenants](#multitenancy) with accountID equal to 12 and 42, while series for other tenants aren't downsampled:
older than one hour only for [tenants](#multitenancy) with accountID equal to 12 and 42, while series for other tenants are dropped:
```
-downsampling.period='{vm_account_id=~"12|42"}:1h:1m'

2
docs/README.md
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@ -1983,7 +1983,7 @@ See how to request a free trial license [here](https://victoriametrics.com/produ
[VictoriaMetrics Enterprise](https://docs.victoriametrics.com/enterprise.html) supports multi-level downsampling via `-downsampling.period=offset:interval` command-line flag.
This command-line flag instructs leaving the last sample per each `interval` for [time series](https://docs.victoriametrics.com/keyconcepts/#time-series)
[samples](https://docs.victoriametrics.com/keyconcepts/#raw-samples) older than the `offset`. For example, `-downsampling.period=30d:5m` instructs leaving the last sample
per each 5-minute interval for samples older than 30 days, while the rest of samples aren't downsampled.
per each 5-minute interval for samples older than 30 days, while the rest of samples are dropped.
The `-downsampling.period` command-line flag can be specified multiple times in order to apply different downsampling levels for different time ranges (aka multi-level downsampling).
For example, `-downsampling.period=30d:5m,180d:1h` instructs leaving the last sample per each 5-minute interval for samples older than 30 days,

2
docs/Single-server-VictoriaMetrics.md
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@ -1991,7 +1991,7 @@ See how to request a free trial license [here](https://victoriametrics.com/produ
[VictoriaMetrics Enterprise](https://docs.victoriametrics.com/enterprise.html) supports multi-level downsampling via `-downsampling.period=offset:interval` command-line flag.
This command-line flag instructs leaving the last sample per each `interval` for [time series](https://docs.victoriametrics.com/keyconcepts/#time-series)
[samples](https://docs.victoriametrics.com/keyconcepts/#raw-samples) older than the `offset`. For example, `-downsampling.period=30d:5m` instructs leaving the last sample
per each 5-minute interval for samples older than 30 days, while the rest of samples aren't downsampled.
per each 5-minute interval for samples older than 30 days, while the rest of samples are dropped.
The `-downsampling.period` command-line flag can be specified multiple times in order to apply different downsampling levels for different time ranges (aka multi-level downsampling).
For example, `-downsampling.period=30d:5m,180d:1h` instructs leaving the last sample per each 5-minute interval for samples older than 30 days,