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README.md: add a few words about scalability

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Aliaksandr Valialkin 2019-10-09 13:01:59 +03:00
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README.md
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@ -14,7 +14,7 @@ Single-node version is easier to configure and operate comparing to cluster vers
## Prominent features
- Supports all the features of [single-node version](https://github.com/VictoriaMetrics/VictoriaMetrics).
- Scales horizontally to multiple nodes.
- Performance and capacity scales horizontally.
- Supports multiple independent namespaces for time series data (aka multi-tenancy).
@ -140,11 +140,16 @@ Ports may be altered by setting `-httpListenAddr` on the corresponding nodes.
across `vmstorage` nodes.
### Cluster resizing
### Cluster resizing and scalability.
Cluster performance and capacity scales with adding new nodes.
* `vminsert` and `vmselect` nodes are stateless and may be added / removed at any time.
Do not forget updating the list of these nodes on http load balancer.
Adding more `vminsert` nodes scales data ingestion rate.
Adding more `vmselect` nodes scales select queries rate.
* `vmstorage` nodes own the ingested data, so they cannot be removed without data loss.
Adding more `vmstorage` nodes scales cluster capacity.
Steps to add `vmstorage` node: