Cross region delta table creation in Azure

[arajshree]

Hi Community.

I have a usecase as below.

1. I have a Azure Databricks [ADB] in NCUS which has Unity Catalog [UC] enabled using the NCUS region metastore.

2. The ADLS Gen2 storage is in EUS

I am trying to registers a existing delta table in UC and also create new tables. Both of the operations hang forever. I am using a custom cluster to do so. If I user a serverless compute it succeeds. If the cross region delta table creation not supported using custom cluster?

[nayan_wylde]

Seems like an networking issue. In a notebook attached to the custom cluster, try dbutils.fs.ls("abfss://<container>@<account>.dfs.core.windows.net/<path>") to confirm reachability before running CREATE EXTERNAL TABLE. (If this hangs or errors, it’s a network/permission issue, not UC SQL.)

Custom cluster runs uns in your VNet. If your ADLS firewall only allows particular VNets/subnets or private endpoints and your NCUS VNet isn’t allowed to reach EUS ADLS, UC’s validation calls from the custom cluster will stall or fail. You must open the network path from that custom cluster to the storage (firewall allowlist, Private Endpoint, DNS, outbound rules).