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[docs-only] Fix readme.md for caches

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mmattel
2023-04-04 09:15:24 +02:00
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commit 255dd06c92
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services/graph/README.md
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@@ -12,4 +12,20 @@ The following image gives an overview of the scenario when a client requests to
<!-- referencing: https://github.com/owncloud/ocis/pull/3816 ([docs-only] add client protocol overview) -->
<img src="./images/mermaid-graph.svg" width="500" />
<img src="https://github.com/owncloud/ocis/blob/master/services/graph/images/mermaid-graph.svg" width="500" />
## Caching
The `graph` service can use a configured store via `GRAPH_STORE_TYPE`. Possible stores are:
- `memory`: Basic in-memory store and the default.
- `ocmem`: Advanced in-memory store allowing max size.
- `redis`: Stores data in a configured redis cluster.
- `redis-sentinel`: Stores data in a configured redis sentinel cluster.
- `etcd`: Stores data in a configured etcd cluster.
- `nats-js`: Stores data using key-value-store feature of [nats jetstream](https://docs.nats.io/nats-concepts/jetstream/key-value-store)
- `noop`: Stores nothing. Useful for testing. Not recommended in productive enviroments.
1. Note that in-memory stores are by nature not reboot persistent.
2. Though usually not necessary, a database name and a database table can be configured for event stores if the event store supports this. Generally not applicapable for stores of type `in-memory`. These settings are blank by default which means that the standard settings of the configured store applies.
3. The proxy service can be scaled if not using `in-memory` stores and the stores are configured identically over all instances.
4. When using `redis-sentinel`, the Redis master to use is configured via `GRAPH_CACHE_STORE_NODES` in the form of `<sentinel-host>:<sentinel-port>/<redis-master>` like `10.10.0.200:26379/mymaster`.