- 7642 Views
- 6 replies
- 3 kudos
Resolved! Is Concurrent Writes from multiple databricks clusters to same delta table on S3 Supported?
Does databricks have support for writing to same Delta Table from multiple clusters concurrently. I am specifically interested to know if there is any solution for https://github.com/delta-io/delta/issues/41 implemented in databricks OR if you have a...
- 7642 Views
- 6 replies
- 3 kudos
- 3 kudos
Please note, the issue noted above [Storage System] Support for AWS S3 (multiple clusters/drivers/JVMs) is for Delta Lake OSS. As noted in this issue as well as Issue 324, as of this writing, S3 lacks putIfAbsent transactional consistency. For Del...
- 3 kudos
- 3403 Views
- 2 replies
- 1 kudos
Resolved! Ingesting logs from Databricks (GCP) to Azure log Analytics
Hi everyone, I wanted to ask if there is any way through which we can ingest logs from GCP databricks to azure log analytics in store-sync fashion. Meaning we will save logs into some cloud bucket lets say, then from there we should be able to send l...
- 3403 Views
- 2 replies
- 1 kudos
- 1 kudos
Hi @Retired_mod ,Thanks for help. We decided to develop our own library for logging to azure log analytics. We used buffer for this. We are currently on timer based logs but in future versions we wanted to move to memory based.Thanks,Nikhil
- 1 kudos
- 4435 Views
- 0 replies
- 0 kudos
Federated Learning for Decentralized, Secure Model Training
Federated learning allows you to train machine learning models on decentralized data while ensuring data privacy and security by storing data on local devices and only sharing model updates. This approach assures that raw data never leaves its source...
- 4435 Views
- 0 replies
- 0 kudos
- 3052 Views
- 3 replies
- 3 kudos
How to reliably get the databricks run time version as part of init scripts in aws/azure databricks
We currently use the script below, but it is not working in some environments.The environment variable used in the script is not listed in this link Databricks Environment Variables```bash#!/bin/bashecho "Databricks Runtime Version: $DATABRICKS_RUNTI...
- 3052 Views
- 3 replies
- 3 kudos
- 3 kudos
If environment variable doesn't work for you, then maybe try with REST API or databrick cli?
- 3 kudos
- 3767 Views
- 1 replies
- 0 kudos
Resolved! How exactly to create cluster policy via Databricks CLI ?
I tried these ways they are all not working: Save the json config into a JSON file locally and run databricks cluster-policies create --json cluster-policy.json Error message: Error: invalid character 'c' looking for beginning of valueSave the json ...
- 3767 Views
- 1 replies
- 0 kudos
- 0 kudos
Hi @guangyi ,Try to add @ before the name of json filedatabricks cluster-policies create --json @policy.json Also make sure that you're escaping quotation marks like they do in below documenation:Create a new policy | Cluster Policies API | REST API ...
- 0 kudos
- 1217 Views
- 0 replies
- 0 kudos
Streaming Kafka data without duplication
Hello,We are creating an application to read data from Kafka topic send by a source. After we get the data, we do some transformations and send to other Kafka topic. In this process source may send same data twice.Our questions are1. How can we contr...
- 1217 Views
- 0 replies
- 0 kudos
- 1401 Views
- 1 replies
- 0 kudos
systems table predictive_optimization_operations_history stays empty
Hi,For our lakehouse with Unity catalog enabled, we enabled predictive optimization feature for several catalogs to clean up storage with Vacuum. When we describe the catalogs, we can see that predictive optimization is enabled. The system table for ...
- 1401 Views
- 1 replies
- 0 kudos
- 0 kudos
Hello as per docs data could take 24 hours to be retrieved, can you confirm if the below requirement are met?Your region must support predictive optimization (see Databricks clouds and regions).
- 0 kudos
- 1594 Views
- 1 replies
- 2 kudos
Image disappears after notebook export to HTML
Hi everyone,I have an image saved at DBFS which I want to include in my notebook. I'm using the standard markdown syntax![my image] (/files/my_image.png)which works and the image shows. However, when I export the notebook to HTML, the image disappear...
- 1594 Views
- 1 replies
- 2 kudos
- 2 kudos
The issue you're experiencing might be due to the fact that when you export your notebook to HTML, the image from DBFS isn't accessible in the same way as it is within the Databricks environment. The DBFS path isn't accessible from outside Databricks...
- 2 kudos
- 2174 Views
- 1 replies
- 2 kudos
Resolved! Grant permission on catalog but revoke from schema for the same user
I have a catalog ( in unity catalog) containing multiple schemas. I need an AD group to have select permission on all the schemas so at catalog level I granted Select to AD grp. Then, I need to revoke permission on one particular schema in this cat...
- 2174 Views
- 1 replies
- 2 kudos
- 2 kudos
This unfortunately is not possible due to the hierarchical mechanism in UC, you will need to grant permissions to the specific schemas directly and not by providing a major permission at the catalog level
- 2 kudos
- 10932 Views
- 4 replies
- 0 kudos
Temp Table Vs Temp View Vs temp table function- which one is better for large Databrick data processing
Hello , 1 ) Which one is better during large data processing - Temp table vs Temporary view vs temp Table function . 2) How lazy evaluation better for processing ? and which one of the above helps in lazy evaluation
- 10932 Views
- 4 replies
- 0 kudos
- 3105 Views
- 1 replies
- 0 kudos
Python UDF vs Scala UDF in pyspark code
Is there a performance difference between Python UDF vs Scala UDF in pyspark code.
- 3105 Views
- 1 replies
- 0 kudos
- 0 kudos
Hi @greyamber ,Yes, there is a difference. Scala would be faster. You read about the reason and benchmark on following blog:Spark UDF — Deep Insights in Performance | by QuantumBlack, AI by McKinsey | QuantumBlack, AI by McKinsey | Medium
- 0 kudos
- 4082 Views
- 3 replies
- 0 kudos
- 4082 Views
- 3 replies
- 0 kudos
- 0 kudos
Hi @hpant ,I think they are really similiar to overall best practices when in comes to python logging, like having centralize logging configuration, using correct log levels etc.Look for example on below article:10 Best Practices for Logging in Pytho...
- 0 kudos
- 2056 Views
- 1 replies
- 0 kudos
Huge Delta table performance consideration
Hi Team,We want to create a delta table which have historical load of 10 TB of data, and we expect an incremental refresh of about 15 GB each day.What factors should we take into account for managing such a large volume of data especially cost and pe...
- 2056 Views
- 1 replies
- 0 kudos
- 0 kudos
@Phani1 ,All that you've mentioned is correct. Additionally, if you have scenario which require DELETE, UPDATE or MERGE you can turn on deletion vecors:Deletion vectors are a storage optimization feature that can be enabled on Delta Lake tables. By d...
- 0 kudos
- 2128 Views
- 1 replies
- 0 kudos
Email Notification not received even when configured in Alerts
Hi Experts,In the Alerts of a job when configured the email id which is whitelisted and auto prompt in the dropdown by databricks, even when configured to receive emails notification it does not shares the email, whereas the same notification of job...
- 2128 Views
- 1 replies
- 0 kudos
- 0 kudos
Hi @SalmanDB2024 ,Are you on Azure? If so, look at below solution. Maybe it will be helpfulSolved: Re: Why I am not receiving any mail sent to the Az... - Databricks Community - 15156
- 0 kudos
- 2831 Views
- 2 replies
- 0 kudos
Upload to Volume
How to programmatically upload parquet files from Azure data lake to Catalog's Volumes? source_path = "abfss://datalake-raw-dev@xxx.dfs.core.windows.net/xxxxx/saxxles/xx/source/ETL/transformed_data/parquet/" # Define the path to your Unity Catalog V...
- 2831 Views
- 2 replies
- 0 kudos
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Besides, when accessing volumes, you don't need to provide dbfs protocol: `/Volumes/xxx/xxx/transformed_parquet`
- 0 kudos
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