You can create multiple services within a subscription, each one provisioned at a specific tier, limited only by the number of services allowed at each tier. For example, you could create up to 12 services at the Basic tier and another 12 services at the S1 tier within the same subscription. For more information about tiers, see Choose a SKU or tier for Azure Search.
Maximum service limits can be raised upon request. Contact Azure Support if you need more services within the same subscription.
| Resource | Free | Basic | S1 | S2 | S3 | S3 HD 1 |
|---|---|---|---|---|---|---|
| Maximum services | 1 | 12 | 12 | 6 | 6 | 6 |
| Maximum scale in SU 2 | N/A 3 | 3 SU 4 | 36 SU | 36 SU | 36 SU | 36 SU |
1 S3 HD does not support indexers at this time.
2 Search units (SU) are billing units, allocated as either a replica or a partition. You need both resources for storage, indexing, and query operations. To learn more about how search units are computed, plus a chart of valid combinations that stay under the maximum limits, see Scale resource levels for query and index workloads.
3 Free is based on shared resources used by multiple subscribers. At this tier, there are no dedicated resources for an individual subscriber. For this reason, maximum scale is marked as not applicable.
4 Basic has one fixed partition. At this tier, additional SUs are used for allocating more replicas for increased query workloads.