Your cluster type determines which search features you can use, how much data you can sync per second, and how you scale over time. Use this page to compare shared and exclusive clusters before choosing.
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Shared cluster: Shared resources billed at a lower cost. Best for development, testing, and lightweight workloads.
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Exclusive cluster: Dedicated resources with higher throughput and configurable limits. Best for production services with high data volumes, strict performance requirements, or advanced search features.
For pricing details, see Billing overview.
Configuration limits
Note: All limits listed as "Configurable" for exclusive clusters can be adjusted by contacting Alibaba Cloud technical support.
| Feature | Item | Shared cluster | Exclusive cluster |
|---|---|---|---|
| Search | Max clause length (except FILTER clauses) | 1 KB before encoding | Configurable |
| Max FILTER clause length | 4 KB before encoding | Configurable | |
| Max results per search | 5,000 | Configurable | |
| Documents in rough sort | 1,000,000 | Configurable | |
| Documents in fine sort | 200 (default) | Configurable | |
| Accurate statistics via AGGREGATE clauses | Accurate for fewer than 100,000 documents | Accurate beyond 100,000 documents (requires enable_accurate_statistics:true in the KVPAIRS clause) |
|
| Online JOIN across multiple tables | Not supported | Supported (storage-optimized exclusive clusters only) | |
| SQL syntax | Not supported | Supported (storage-optimized exclusive clusters only) | |
| Sort policy | Supported configurations | Rough sort and fine sort | Rough sort and fine sort |
| Rough sort type | Weight expression | Weight expression and formula expression | |
| Max sort policies | 30 | 50 | |
| Cava advanced custom sort plug-in | Not supported | Supported | |
| Cluster management | Creation | Create directly | Create separately; contact technical support if you exceed the deployment set quota |
| Scaling | Flexible scaling | Create a new cluster separately; contact technical support if you exceed the deployment set quota | |
| Industry template | Industry Algorithm Edition for E-commerce | Not supported | Not supported |
| Industry Algorithm Edition for education | Not supported | Not supported | |
| Industry Algorithm Edition for gaming | Not supported | Not supported | |
| Industry Algorithm Edition for content community | Not supported | Not supported |
Performance
| Feature | Item | Shared cluster | Exclusive cluster |
|---|---|---|---|
| Data synchronization | Total API request data per second | 2 MB | 15 MB by default; configurable |
| Max incremental data rate from ApsaraDB RDS and PolarDB | 2 MB/s | 15 MB/s by default; configurable | |
| Retrieval | Query execution time | Milliseconds | Milliseconds |
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