Why there is no snitch specifically for Azure same like for AWS and GCP
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The snitches are donated to the Apache Cassandra project from the respective cloud providers. For example,
GoogleCloudSnitch was contributed by Brian Lynch (CASSANDRA-7132) who at the time was a Google Cloud Architect and
CloudstackSnitch was contributed by Pierre-Yves Ritschard (CASSANDRA-7147) who is CTO at Exoscale, a Cloudstack provider.
I understand the convenience that a cloud provider snitch affords users but one can argue that even when your organisation exclusively uses a specific provider,
GossipingPropertyFileSnitch should still be the default choice. GPFS is more flexible and works with hybrid clouds -- you can have a mix of nodes in AWS, Azure, GCP and even on-premise.
Let's say your company exclusively uses GCP at the moment. When you decide to expand your cluster to another cloud provider, you'll need to change to a provider-agnostic snitch like GPFS. Snitches determine how replicas are distributed in a cluster and so switching snitches requires a lot of planning and it can be a costly exercise. For this reason, we recommend using
GossipingPropertyFileSnitch right from the start in all cases.
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