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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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Danielsg94
by • New Contributor II
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Resolved! How can I write a single file to a blob storage using a Python notebook, to a folder with other data?

When I use the following code: df .coalesce(1) .write.format("com.databricks.spark.csv") .option("header", "true") .save("/path/mydata.csv")it writes several files, and when used with .mode("overwrite"), it will overwrite everything in th...

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Simha
New Contributor II
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Hi Daniel,May I know, how did you fix this issue. I am facing similar issue while writing csv/parquet to blob/adls, it creates a separate folder with the filename and creates a partition file within that folder.I need to write just a file on to the b...

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kyzers0ze
by • New Contributor
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0 byte files appearing in blob storage

When writing out files to azure blob storage using spark there are some 0 byte files being created on the web portal but not when I view it using storage explorer.I was wondering if there is there any work around for this?

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Anonymous
Not applicable
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Hi @Ryan Low​ Great to meet you, and thanks for your question! Let's see if your peers in the community have an answer to your question. Thanks.

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Chilangdon
by • New Contributor
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How to connect to a delta table that lives in a blob storage to display in a web app?

Hi, somebody to help me how to connect a delta table with a web app? I search to a delta-rs library but I can't obtain to make the connection.

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etsyal1e2r3
Honored Contributor
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Without downloading the files directly every time, you have to create a sql warehouse cluster and connect to it via jdbc connection. This way you just use the requests library in python (or an equal one in another language like axios for javascript) ...

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Chilangdon
by • New Contributor
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Resolved! How to load multiple xlsx that are storage in different folders with the same name in a blob storage in a delta table ?

Hi i have a blob storage with multile unzip folders with the same suffix folder_report_name_01_2023_01_02 -> file_name_2023_01_02.xlsxBut i want to load all of this data using pandas or pyspark and insert in my delta table.I'm trying to using widget...

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Anonymous
Not applicable
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Hi @Fernando Vázquez​ Hope all is well! Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help. We'd love to hear from you.T...

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niels
by • New Contributor III
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Azure SA mounted but can't load files

I am attempting to load an excel file that's located in a blob storage that I've mounted. In the first cell, when I use the dbutils.fs.ls command, I can see the file I want to load. However, when I try to actually load it, it can't find the file. It ...

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Vidula
Honored Contributor
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Hi @Niels Ota​ Hope all is well! Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help. We'd love to hear from you.Thanks!

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Athar
by • New Contributor
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How to import blob storage container with sub-directories as a database in databricks sql?

I am trying to upload blob storage on databricks sql warehouse. I followed this document https://docs.databricks.com/data/data-sources/azure/azure-storage.html. but this doesn't seem to be working. Query executed fine but created schema was empty. An...

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BilalAslamDbrx
Databricks Employee
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@Athar Abbas​ the simplest thing would be to create a SAS token to the ADLS Gen 2 container and then use the COPY INTO command with the AZURE_SAS_TOKEN credential: https://docs.microsoft.com/en-us/azure/databricks/data/data-sources/azure/adls-gen2/az...

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Surendra
by • New Contributor III
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Resolved! Databricks notebook is taking 2 hours to write to /dbfs/mnt (blob storage). Same job is taking 8 minutes to write to /dbfs/FileStore. I would like to understand why write performance is different in both cases.

Problem statement:Source file format : .tar.gzAvg size: 10 mbnumber of tar.gz files: 1000Each tar.gz file contails around 20000 csv files.Requirement : Untar the tar.gz file and write CSV files to blob storage / intermediate storage layer for further...

databricks_write_to_dbfsMount databricks_write_to_dbfsMount
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Surendra
New Contributor III
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@Hubert Dudek​  Thanks for your suggestions.After creating storage account in same region as databricks I can see that performance is as expected.Now it is clear that issue is with /mnt/ location is being in different region than databricks. I would ...

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SettlerOfCatan
by • New Contributor
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Access data within the blob storage without downloading

Our customer is using Azure’s blob storage service to save big files so that we can work with them using an Azure online service, like Databricks.We want to read and work with these files with a computing resource obtained by Azure directly without d...

blob-storage Azure-ML fileytypes blob
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