Kiu/VictoriaMetrics
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README.md: add a section about backfilling

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Aliaksandr Valialkin 2019-08-20 00:34:44 +03:00
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@ -38,7 +38,7 @@ Cluster version is available [here](https://github.com/VictoriaMetrics/VictoriaM
* All the data is stored in a single directory pointed by `-storageDataPath` flag. * All the data is stored in a single directory pointed by `-storageDataPath` flag.
* Easy backups from [instant snapshots](https://medium.com/@valyala/how-victoriametrics-makes-instant-snapshots-for-multi-terabyte-time-series-data-e1f3fb0e0282). * Easy backups from [instant snapshots](https://medium.com/@valyala/how-victoriametrics-makes-instant-snapshots-for-multi-terabyte-time-series-data-e1f3fb0e0282).
* Storage is protected from corruption on unclean shutdown (i.e. hardware reset or `kill -9`) thanks to [the storage architecture](https://medium.com/@valyala/how-victoriametrics-makes-instant-snapshots-for-multi-terabyte-time-series-data-e1f3fb0e0282). * Storage is protected from corruption on unclean shutdown (i.e. hardware reset or `kill -9`) thanks to [the storage architecture](https://medium.com/@valyala/how-victoriametrics-makes-instant-snapshots-for-multi-terabyte-time-series-data-e1f3fb0e0282).
* Supports metrics' ingestion and backfilling via the following protocols: * Supports metrics' ingestion and [backfilling](#backfilling) via the following protocols:
* [Prometheus remote write API](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#remote_write) * [Prometheus remote write API](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#remote_write)
* [InfluxDB line protocol](https://docs.influxdata.com/influxdb/v1.7/write_protocols/line_protocol_tutorial/) * [InfluxDB line protocol](https://docs.influxdata.com/influxdb/v1.7/write_protocols/line_protocol_tutorial/)
* [Graphite plaintext protocol](https://graphite.readthedocs.io/en/latest/feeding-carbon.html) with [tags](https://graphite.readthedocs.io/en/latest/tags.html#carbon) * [Graphite plaintext protocol](https://graphite.readthedocs.io/en/latest/feeding-carbon.html) with [tags](https://graphite.readthedocs.io/en/latest/tags.html#carbon)
@ -86,6 +86,7 @@ Cluster version is available [here](https://github.com/VictoriaMetrics/VictoriaM
- [Tuning](#tuning) - [Tuning](#tuning)
- [Monitoring](#monitoring) - [Monitoring](#monitoring)
- [Troubleshooting](#troubleshooting) - [Troubleshooting](#troubleshooting)
- [Backfilling](#backfilling)
- [Roadmap](#roadmap) - [Roadmap](#roadmap)
- [Contacts](#contacts) - [Contacts](#contacts)
- [Community and contributions](#community-and-contributions) - [Community and contributions](#community-and-contributions)
@ -637,6 +638,14 @@ The most interesting metrics are:
of data loss stored in the broken parts. In the future, `vmrecover` tool will be created of data loss stored in the broken parts. In the future, `vmrecover` tool will be created
for automatic recovering from such errors. for automatic recovering from such errors.
### Backfilling
It is recommended disabling query cache with `-search.disableCache` command-line flag when writing
historical data with timestamps from the past, since the cache assumes that the data is written with
the current timestamps. Query cache can be enabled after the backfilling is complete.
## Roadmap ## Roadmap
- [ ] Replication [#118](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/118) - [ ] Replication [#118](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/118)