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Data Engineering
Join discussions on data engineering best practices, architectures, and optimization strategies within the Databricks Community. Exchange insights and solutions with fellow data engineers.
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Data + AI Summit 2024 - Data Engineering & Streaming

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Kumarashokjmu
by • New Contributor II
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need to ingest millions of csv files from aws s3

I have a need to ingest millions of csv files from aws s3 bucket. I am facing issue with aws s3 throttling issue and besides notebook process is running for 8 hours plus and sometimes failing. When looking at cluster performance, it is utilized 60%.I...

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kulkpd
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If you want to load all the data at once use autoloader or DLT pipeline with directory listing if files are lexically ordered. ORIf you want to perform incremental load, divide the load into two job like historic data load vs live data load:Live data...

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pankz-104
by • New Contributor
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how to read deleted files in adls

We have soft delete enabled in adls for 3 days, And we have manually deleted some checkpoint files size 3 tb approx. Each file is just couple of bytes like 30 b, 40 b. The deleted file size is increasing day by day even after couple of days. Suppose ...

Data Engineering
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jose_gonzalez
Moderator
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Hi @pankz-104 , Just a friendly follow-up. Did you have time to test Kaniz's recommendations? do you still have issues? please let us know

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Chris_sh
by • New Contributor II
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DLT Missing Select tables button or Enhancement Request?

Currently when a Delta Live Table fails due to an error the option to select specific tables to run a full refresh is removed. This seems like an error. A full refresh can fix an error that might be caused and you should always be able to select to d...

Chris_sh_0-1700066428625.png Chris_sh_2-1700066503115.png
Data Engineering
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jose_gonzalez
Moderator
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Hi @Chris_sh, which DLT channel are you using? 

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Rajaniesh
by • New Contributor III
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URGENT HELP NEEDED: Python functions deployed in the cluster throwing the error

Hi,I have created a python wheel with the following code. And the package name is rule_engine"""The entry point of the Python Wheel"""import sysfrom pyspark.sql.functions import expr, coldef get_rules(tag): """  loads data quality rules from a table ...

Data Engineering
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jose_gonzalez
Moderator
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You can find more details and examples here https://docs.databricks.com/en/workflows/jobs/how-to/use-python-wheels-in-workflows.html#use-a-python-wheel-in-a-databricks-job

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dcc
by • New Contributor
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DBT Jobs || API call returns "Internal Error"

Hey there,I am currently using the Databricks API to trigger a specific DBT job. For this, I am calling the API in a Web Activity on Azure datafactory and sending as headers the token and for the body I am sending the Job ID and the necessary vars I ...

Data Engineering
API
jobs
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jose_gonzalez
Moderator
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Could you please share the driver logs? it will help us to narrow down the issue

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chari
by • Contributor
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Resolved! Connect to data in one drive to Azure Databricks

Hello,A colleague of mine previously built a data pipeline for connecting data available on share point (one drive), coded in python in jupyter notebook. Now, its my job to transfer the code to Azure databricks and I am unable to connect/download thi...

Data Engineering
Workflows
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gabsylvain
Contributor
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@chari Also you ingest both Sharepoint and OneDrive data directly into Databricks using Partner Connect. You can refer to the documentation bellow for more information: Connect to Fivetran using Partner Connect Fivetran Sharepoint Connector Documenta...

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quakenbush
by • Contributor
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Resolved! Is Autoloader suitable to load full dumps?

Hi,I recently completed the fundamentals & advanced data engineer exam, yet I've got a question about Autoloader. Please don't go too hard on me, since I lack practical experience at this point in time Docs say this is incremental ingestion, so it's ...

Data Engineering
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Kaniz_Fatma
Community Manager
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Our End-of-Year Community Survey is here! Please take a few moments to complete the survey. Your feedback matters!

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rvo1994
by • New Contributor
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Performance issue with spatial reference system conversions

Hi,I am facing a performance issue with spatial reference system conversions. My delta table has approximately 10 GB/46 files/160M records and gets +/- 5M records every week. After ingestion, I need to convert points (columns GE_XY_XCOR and GE_XY_YCO...

Data Engineering
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BriGuy
by • New Contributor II
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How can I efficiently write to easily queryable logs?

I've got a parallel running process loading multiple tables into the datalake. I'm writing my logs to a delta table using dataframewriter in append mode. The problem is that every save is taking a bit of time with what appears to be the calculation o...

Data Engineering
logging
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MrDataMan
by • New Contributor II
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Expand and read Zip compressed files not working

I am trying to unzip compressed files following this doc (https://docs.databricks.com/en/files/unzip-files.html) but I am getting the error.When I run:dbutils.fs.mv("file:/LoanStats3a.csv", "dbfs:/tmp/LoanStats3a.csv") I get the following error: java...

Data Engineering
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gabsylvain
Contributor
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Hey @MrDataMan, I wasn't able to reproduce the exact same error you did get, but I still got a similar error while trying to run the example. To solve it, I tweaked the code a little bit:   %sh curl https://resources.lendingclub.com/LoanStats3a.csv.z...

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BriGuy
by • New Contributor II
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process logging optimisation

I have created a process that runs a notebook multiple times in parallel with different parameters.  This was working quite quickly.  However I've added several logging steps that are appending log details to a dataframe then using dataframewriter to...

Data Engineering
logging
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Kaniz_Fatma
Community Manager
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Hi @BriGuy, Regarding your Databricks SQL Editor issue, you’re not alone! Several users have faced similar problems.    Here are some steps you can take:   Contact Databricks Support: I recommend contacting Databricks support. File a support ticket t...

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data_turtle
by • New Contributor
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Are init scripts breaking clusters?

My Jobs were running just fine, but for some reason all of a sudden they all started failing.  When I looked into it I saw it was an error due to an init script error (we do use an init script).    run failed with error message Cluster 1117-045226-l...

Data Engineering
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User16539034020
Contributor II
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  Thank you for reaching out to Databricks Support. Could you please specify the location of the initialization script you are referring to? Additionally, it would be helpful to know whether this is a global init script or one specific to a cluster. ...

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Priyam1
by • New Contributor III
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Databricks PAT Logs

As an admin, how can i check which external applications are being connected with databricks by people through Personal Access Token. I have used the token API to get the token list but i couldn't find any other REST API reference for obtaining the i...

Data Engineering
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Kaniz_Fatma
Community Manager
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Hi @Priyam1, As an administrator, you can manage personal access tokens (PATs) in your Databricks workspace. These tokens allow users to authenticate to the Databricks REST API.   Let’s explore how you can handle PATs and monitor external application...

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kavya08
by • New Contributor
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curl: (26) Failed to open/read local data from file/application in DBFS

Hi all,I am trying to upload a parquet file from S3 to dbfs with airflow bash operator curl command using Databricks python Rest API's as shown below   databricks_load_task = BashOperator( task_id="upload_to_databricks", bash_command ...

Data Engineering
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Kaniz_Fatma
Community Manager
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Hi @kavya08, There might be an issue with how the file path is specified in your curl command.  File Path Issue: The --form contents="@s3://bucket/test/file.parquet" part of your curl command specifies the file to be uploaded. Ensure that the path to...

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sunil_ksheersag
by • New Contributor
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synapse pyspark delta lake merge scd type2 without primary key

ProblemI have a set of rows coming from previous process which has no primary key, and the composite keys are bound to change which are not a good case for composite key, only way the rows are unique is the whole row( including all keys and all value...

Data Engineering
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Kaniz_Fatma
Community Manager
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Hi @sunil_ksheersag, Implementing Slowly Changing Dimension (SCD) Type 2 without a primary key can be challenging, but there are alternative approaches you can consider.    Here are some strategies to handle this situation:   Surrogate Key Approach: ...

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