Database / ScyllaDB Interview questions
What is the difference between ScyllaDB and DynamoDB?
| ScyllaDB | DynamoDB |
| Self-managed or ScyllaDB Cloud; deployable anywhere. | Fully managed, AWS-only. |
| CQL as the native query language, plus Alternator for DynamoDB API compatibility. | Proprietary DynamoDB API only. |
| Pricing based on provisioned/self-managed infrastructure. | Pricing based on provisioned or on-demand request capacity. |
| Open architecture; visibility into compaction, repair, and internals. | Fully opaque; no operational visibility into internals. |
DynamoDB trades operational control for zero-ops convenience within AWS, which suits teams that want to avoid managing infrastructure entirely. ScyllaDB (via Alternator) suits teams that want DynamoDB-style access patterns but need multi-cloud or on-premises deployment, more predictable and often lower cost at scale, or deeper visibility into performance internals for tuning - at the cost of taking on more operational responsibility than a fully managed service.
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