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Cluster Types¶
Overview¶
When creating a cluster, you can choose between a Standard or an X Cloud cluster.
X Cloud clusters offer up to 90% storage utilization, better elasticity, and faster scaling. Some ScyllaDB features are not available in X Cloud clusters. See X Cloud Limitations.
Standard clusters offer up to 70% storage utilization and a complete set of ScyllaDB features.
Standard |
X Cloud BETA |
|
|---|---|---|
Tablets |
Yes (default) |
Yes (enforced) |
Vnodes |
Yes |
No |
Storage Utilization |
Up to 70% |
Up to 90% |
Multi-DC |
Yes |
No |
ScyllaDB Features |
Full |
X Cloud Clusters¶
If you choose the X Cloud option, tablets-based data replication in your cluster is enforced on all keyspaces. Owing to tablets, X Cloud clusters provide better elasticity, faster scaling, and allow you to reach up to 90% storage utilization.
X Cloud is in the Beta stage and has some limitations. We’re actively working to expand functionality in future updates.
X Cloud Limitations¶
X Cloud clusters rely exclusively on tablets-based data distribution and are subject to the limitations resulting from the use of tablets. The limitations will be removed in upcoming ScyllaDB releases.
This section lists the features unsupported for tablets in ScyllaDB 2025.1.
Alternator
Change Data Capture (CDC)
Counters
Lightweight Transactions (LWT)
Materialized Views (MV)
Secondary indexes (SI)
In addition, X Cloud is limited to single-datacenter (single-DC) clusters.
If you plan to use any of the above features or multi-DC deployment, create a Standard cluster.
Standard Clusters¶
If you choose the Standard option, data replication in your cluster can be based on tablets (default) or vnodes, depending on the configuration of your keyspaces.
When you CREATE a keyspace, it has tablets enabled by default. To use vnodes-based data replication, you must explicitly disable tablets when you CREATE a keyspace. See Enabling Tablets in the ScyllaDB documentation for instructions.
You need to disable tablets in favor of vnodes if you’re going to use any of the ScyllaDB features that are not supported for tablets.
A Standard cluster allows you to reach up to 70% storage utilization.
References¶
See Data Distribution with Tablets in the ScyllaDB documentation for more information about tablets.