> ## Documentation Index
> Fetch the complete documentation index at: https://docs.e6data.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Cloud provider

> Cloud-provider-specific limits and constraints when running e6data.

Limits and constraints that vary by cloud provider.

## AWS

| Limit | Default | Adjustable |
| - | - | - |
| Concurrent EC2 instances per cluster | Limited by AWS account quotas | Yes - request quota increase |
| VPC peering for In-VPC deployments | Up to AWS default limits | Yes - request via support |
| S3 bucket access | Same-region recommended | Cross-region works but adds latency/cost |
| Cross-account IAM trust | Supported via role assumption | Standard AWS configuration |

## Azure

| Limit | Default | Adjustable |
| - | - | - |
| Subscription quota for VM cores | Per Azure subscription default | Yes - request quota increase in Azure portal |
| ADLS Gen2 access | Same-region recommended | Cross-region works but adds latency/cost |
| Cross-tenant access | Supported via Managed Identity federation | Standard Azure configuration |
| Network Contributor on VNet | Required for In-VPC internal LB | Configured per cluster |

## Universal limits across clouds

| Limit | Value | Notes |
| - | - | - |
| Max executors per cluster | 10,000 | Practical limit; most clusters are far smaller |
| Concurrent queries per workspace | Workspace-dependent | Contact support to raise |
| Result set size per query | 100 MB via REST API | Use streaming for larger |
| Catalog name length | 64 characters | Reasonable practical limit |
| Workspace name length | 1–18 characters | Hard limit |

## Region pairing recommendations

For minimal latency and cost, keep these in the same region:

* e6data workspace
* Underlying data (S3, ADLS Gen2)
* Metastore (Hive, Glue, Unity, Polaris)

Cross-region or cross-cloud access works but introduces:

* Egress costs (often significant for large data scans)
* Latency (10–200ms added per query)
* Reliability dependencies on cross-region networking

## See also

* [Services and dependencies](/platform/reference/services-and-dependencies)
* [Limitations overview](/query/limitations)


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