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Administration & Architecture
Explore discussions on Databricks administration, deployment strategies, and architectural best practices. Connect with administrators and architects to optimize your Databricks environment for performance, scalability, and security.
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Forum Posts

martkev
by New Contributor III
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Skepticism about U2M OAuth: Does Snowflake Federation Actually Switch User Identity per Query?

Hi everyone,I'm currently setting up Snowflake federation with Databricks using Microsoft Entra ID (U2M OAuth). However, I'm skeptical that the connection truly switches the user identity dynamically for each Databricks user (https://docs.databricks....

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mark_ott
Databricks Employee
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Snowflake federation with Databricks using Microsoft Entra ID (U2M OAuth) is intended to support per-user identity propagation—that is, each Databricks user is supposed to have queries executed under their own Snowflake identity at query time, rather...

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Escarigasco
by New Contributor III
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Resolved! Azure Databricks Meters vs Databricks SKUs from system.billing table

When it comes to DBU, I am being charged by Azure for the following meters:- Premium Jobs Compute DBU <-- DBUs that my job computes are spending- Premium Serverless SQL DBU <-- DBUs that the SQL Warehouse compute is spending- Premium All-Purpose Phot...

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Escarigasco
New Contributor III
  • 3 kudos

Thank you Bianca, great answer!

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Nisha_Tech
by New Contributor II
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Databricks Asset Bundle Deployment Fails in GitHub Actions with Federated Identity Credentials

I am using a service principal with workspace admin access to deploy Databricks asset bundles. The deployment works successfully via Jenkins using the same credentials and commands. However, when attempting the deployment through GitHub Actions, I en...

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Hubert-Dudek
Databricks MVP
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Environment variables override .databrickscfg, that's why it is probably failing to OIDC. Make sure that you have correct specification in your databricks.yml so it will be source of true. Smth like: - name: Deploy bundle env: DATABRICKS_HOST: ...

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Raman_Unifeye
by Honored Contributor III
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TCO calculator for Databricks Analytics

Similar to the cloud infra calculators, is there a TCO calculator exist for Databricks?Lets say we have the inputs such as Number of source tables, data pipelines (estimated number), data growth per day, transfromation complexity and target reports a...

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Raman_Unifeye
Honored Contributor III
  • 1 kudos

@szymon_dybczak - I am aware of that calculator, however, the challenge is - how to even calculate the number of DBU it will consume based on the volume of data processing etc. The tool starts with the Infra and compute inputs. However, my question i...

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IvanPopov
by New Contributor
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Does Databricks support HNS in GCP?

Hello,I need to set up some buckets in GCP which will be used as an analytics and productive data lake. I am getting diverging feedback on whether hierarchical namespaces (HNS) should be enabled for these buckets.On one hand, HNS is advisable for ana...

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szymon_dybczak
Esteemed Contributor III
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Hi @IvanPopov ,According to docs Google Cloud Storage hierarchical namespace (HNS) is not supported with external locations. You must disable hierarchical namespace before creating an external location. 

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nk-five1
by New Contributor III
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UC volumes not useable in Apps?

I have to install some custom library in a Python Databricks App. According to the documentation this should be possible through UC volumes:https://docs.databricks.com/aws/en/dev-tools/databricks-apps/dependencies#install-wheel-files-from-unity-catal...

Administration & Architecture
App
UC volumes
Unity Catalog
  • 2544 Views
  • 7 replies
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Latest Reply
Hubert-Dudek
Databricks MVP
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AlekseiDiaz
by New Contributor II
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Internet Access from Serverless Databricks - free trial

Hi community. I started to use databricks quick set up free trial and I have been trying to access internet from a python notebook but I haven't been able to do so. Even my UI is different. Is it becasue I am using free trial?

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AlekseiDiaz
New Contributor II
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I changed the set up and I linked it to aws workspace. It doesn't raise any error now.But I was using requests

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rmusti
by New Contributor II
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What is the maximum number of workspaces per account on GCP

I found this in the docs: "you can create at most 200 workspaces per week in the same Google Cloud project" -But that directly contradicts the 20 limit that is mentioned in resource limits docs  . But Azure has no limit, and AWS has a limit of 50. So...

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szymon_dybczak
Esteemed Contributor III
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Hi @rmusti ,This is a bit confusing but not contradictory. Here's the important line in the docs:"For limits where Fixed is No, you can request a limit increase through your Databricks account team."So, below you have a table with resource limits. In...

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AxelM
by New Contributor
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Only absolute paths are currently supported. Paths must begin with '/'

I am facing the above issue when using the Python Databricks SDK. I retreive the job-definition by "client.jobs.get()" and then try to create it on another workspace with"client.jobs.create()"Therefore the job-definition is correct and working fine o...

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iyashk-DB
Databricks Employee
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You’re hitting a Jobs validation rule that depends on where the notebook is sourced from. With Git-sourced jobs, notebook paths must be relative; with workspace-sourced jobs, paths must be absolute and start with “/”. If a task’s source is treated as...

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SantoshMundhe
by New Contributor II
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Resolved! Databricks On prem version

Hello, Does Databricks offer an on-premises deployment option?If so, does the on-prem version have any restrictions? If not, is there a way around it? Thank you.  

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SantoshMundhe
New Contributor II
  • 1 kudos

Thank you 

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158576
by New Contributor
  • 343 Views
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mount cifs volume on all purpose compute results in permission denied

I have all networking already set, nslookup resolves NAS server IP and connectivity is enabled from worker nodes to nas server. I am able to mount the same nas drive outside of databricks, I mean standalone linux vm in the same VPC where worker nodes...

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siva-anantha
Databricks Partner
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Hello, Could you provide with more information about why you want to attach NAS drive to Databricks cluster, please? I am no expert in Storage. As far as I understand, NAS will suffer with IO and Replication Bottlenecks, when attached to Distributed ...

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zaicnupagadi
by New Contributor II
  • 637 Views
  • 2 replies
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Resolved! Reaching out to Azure Storage with IP from Private VNET pool

Hey All,Is there a way for Databricks to reach out to Azure Storage using private endpoint?We would like no omit enabling access by "all trusted services".All resources are in the same VNET however when Databrics tries to reach out to Storage instead...

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zaicnupagadi
New Contributor II
  • 4 kudos

Sorry for late reply - thank you for your help Nayan!

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maikel
by Contributor II
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Agent outside databricks communication with databricks MCP server

Hello Community!I have a following use case in my project:User -> AI agent -> MCP Server -> Databricks data from unity catalog.- AI agent is not created in the databricks- MCP server is created in the databricks and should expose tools to get data fr...

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Latest Reply
maikel
Contributor II
  • 2 kudos

Hello @mark_ott thank you very much for this! It gives me a lot of knowledge! I think that since data is stored in databricks we will go with MCP deployed there as well.I have next portion of questions - can you please tell me how to deploy my mcp se...

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Dharma25
by New Contributor III
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Task Hanging issue on DBR 15.4

Hello,I am running strucutred streaming pipeline with 5 models loaded using pyfunc.spark_udf. Lately we have been noticing very strange issue of tasks getting hanged and batch is taking very long time finishing its execution.CPU utilization is around...

Screenshot 2025-11-27 at 10.24.41 PM.png
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Latest Reply
bianca_unifeye
Databricks MVP
  • 1 kudos

On DBR 15.4 the DeadlockDetector: TASK_HANGING message usually just means Spark has noticed some very long-running tasks and is checking for deadlocks. With multiple pyfunc.spark_udf models in a streaming query the tasks often appear “stuck” because ...

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ismaelhenzel
by Valued Contributor
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Resolved! Asset bundle vs terraform

I would like to understand the differences between Terraform and Asset Bundles, especially since in some cases, they can do the same thing. I’m not talking about provisioning storage, networking, or the Databricks workspace itself—I know that is Terr...

  • 3236 Views
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Latest Reply
Coffee77
Honored Contributor II
  • 3 kudos

First, DAB uses terraform in the background. Having said that, my recommendation is to use DAB for whatever component already included and only other tools for IaC not supported yet or non-databricks specific (private VNets, external storages, etc.) ...

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