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Update README to mention you cannot do Cassandra only anymore. #499

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Jun 18, 2024
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Update README to mention you cannot do Cassandra only anymore. #499

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6 changes: 4 additions & 2 deletions README.md
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Expand Up @@ -42,20 +42,22 @@ The sections that follow describe various deployment configurations, from a mini

### Minimal installation with required dependencies only

To install Temporal in a limited but working and self-contained configuration (one replica of Cassandra and each of Temporal's services, no metrics or ElasticSearch), you can run the following command
To install Temporal in a limited but working and self-contained configuration (one replica of Cassandra, ElasticSearch and each of Temporal's services, no metrics), you can run the following command

```bash
helm install \
--set server.replicaCount=1 \
--set cassandra.config.cluster_size=1 \
--set elasticsearch.replicas=1 \
--set prometheus.enabled=false \
--set grafana.enabled=false \
--set elasticsearch.enabled=false \
temporaltest . --timeout 15m
```

This configuration consumes limited resources and it is useful for small scale tests (such as using minikube).

Note: It used to be possible to install Temporal with just Cassandra. Since Temporal 1.21, this is no longer supported. Cassandra is not supported as a visibility store, so ElasticSearch or an SQL store must be enabled.

Below is an example of an environment installed in this configuration:

```
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