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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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Forum Posts

shubhadip
by New Contributor
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If we do z-order on a particular column will delta log stats collection be affected?

Let's assume a table contains more than 40 columns, now we know it automatically collects stat for the first 32 columns. If we run a z-order on a particular column(let's say column 1), then will the log file collect stats for all the 32 columns or wi...

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Anonymous
Not applicable
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@Shubhadip Ghosh​ : Hope this helps. In Delta Lake, when you perform Z-Ordering on a particular column, it reorganizes the data within the files based on the values of that column. However, Z-Ordering itself does not directly affect the statistics co...

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shubhadip
by New Contributor
  • 1183 Views
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Will consecutive delete insert affect z-ordering?

Let's say there is a delta table with a date field as its partition. In a table where condition, we delete all the rows according to the division. The data is currently being inserted into the same date field. If we do a z-order after inserting the d...

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Anonymous
Not applicable
  • 0 kudos

@Shubhadip Ghosh​ :In Delta Lake, when you perform a delete operation on a table, it doesn't physically remove the data from the files. Instead, it marks the affected rows for deletion by adding a tombstone marker to the Delta transaction log. This e...

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Anonymous
by Not applicable
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 Presenting top 3 members who contributed to Community last week between 11th June-17th June- ​ @Tyler Heflin​ @Werner Stinckens​  and @Bharathan K​  ...

 Presenting top 3 members who contributed to Community last week between 11th June-17th June- ​ @Tyler Heflin​ @Werner Stinckens​  and @Bharathan K​ We would like to express our gratitude for your participation and dedication in the Databricks Commun...

Copy of 2023-05-Community-ongoing-announcement-1200x628 (2)
  • 1570 Views
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liamod_1
by New Contributor III
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Resolved! Failure starting repl

Hi, we have several clusters that keep giving this error:Failure starting repl. Try detaching and re-attaching the notebook.All the investigation I've done points to this issue being related to the number of concurrent connections but we only have 1 ...

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liamod_1
New Contributor III
  • 8 kudos

@Aviral Bhardwaj​ thanks, this seemed to fix the issue, we had an innit script that was potentially conflicting with UI set libraries (in cluster settings).

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Aanchal
by New Contributor III
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Resolved! Unable to lunch cluster in Databricks as my azure subscription has been disabled

Azure subscription- disabledDatabricks subscription- free trial 13 day leftDatabricks host- AzureThe cluster is not getting created as my Azure subscription has been disabled after a month of free trial. However, Databricks subscription has still got...

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Anonymous
Not applicable
  • 2 kudos

Hi @Aanchal Soni​ We haven't heard from you since the last response from @Tyler Retzlaff​ ​, and I was checking back to see if her suggestions helped you.Or else, If you have any solution, please share it with the community, as it can be helpful to o...

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PK225
by New Contributor III
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Anonymous
Not applicable
  • 2 kudos

Hi @Pavan Kumar​ 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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Nikhil3107
by New Contributor III
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Model Serving error - Java gateway process exited before sending its port number

Hello, I am trying to serve a model endpoint (using Databricks GUI) for a model that was successfully logged to the Model Registry. However, the endpoint creation failed with the following errors: Endpoint logs with error messagesEndpoint events with...

image.png Endpoint events log model image
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Anonymous
Not applicable
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Hi @Nikhil Gajghate​ We haven't heard from you since the last response from @Kaniz Fatma​ ​, and I was checking back to see if her suggestions helped you.Or else, If you have any solution, please share it with the community, as it can be helpful to o...

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shishirs29
by New Contributor II
  • 1486 Views
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Resolved! Databricks voucher

I have attended the training last year of databricks to gain knowledge and help the clients but later i got to know that there are vouchers also available for which survey needs to complete which i completed now. I have already given some of the exam...

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Anonymous
Not applicable
  • 5 kudos

Hi @Shishir Shivhare​ Thank you for posting your question in our community! We are happy to assist you.To help us provide you with the most accurate information, could you please take a moment to review the responses and select the one that best answ...

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ashu_aith1991
by New Contributor II
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delta table

can we connect delta table of databricks from one workspace to another in different subscription and run vacuum command?

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Latest Reply
Anonymous
Not applicable
  • 3 kudos

Hi @ASHUTOSH YADAV​ 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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alemo
by New Contributor III
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DLT started by SERVICE_UPGRADE

HelloI'm developing a dlt pipeline, configured in continuous mode.I'm still in dev mode, so I stop my pipeline when i'm not working on it.My problem is that the pipeline is frequently started by SERVICE_UPGRADE.example of message:'Update xxxxx starte...

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Latest Reply
Anonymous
Not applicable
  • 1 kudos

Hi @alex mo​ 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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apiury
by New Contributor III
  • 6039 Views
  • 9 replies
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Resolved! Pipeline workflow dude

Hi! I have a problem. I'm using an autoloader to ingest data from raw to a Delta Lake, but when my pipeline starts, I want to apply the pipeline only to the new data. The autoloader ingests data into the Delta Lake, but now, how can I distinguish the...

  • 6039 Views
  • 9 replies
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Latest Reply
Anonymous
Not applicable
  • 14 kudos

Hi @Alejandro Piury Pinzón​ We haven't heard from you since the last response from @Tyler Retzlaff​ ​, and I was checking back to see if her suggestions helped you.Or else, If you have any solution, please share it with the community, as it can be he...

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Tjomme
by New Contributor III
  • 12736 Views
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Resolved! How to manipulate files in an external location?

According to the documentation, the usage of external locations is preferred over the use of mount points.Unfortunately the basic funtionality to manipulate files seems to be missing.This is my scenario:create a download folder in an external locatio...

  • 12736 Views
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Latest Reply
Tjomme
New Contributor III
  • 8 kudos

The main problem was related to the network configuration of the storage account: Databricks did not have access. Quite strange that it did manage to create folders...Currently dbutils.fs functionality is working.For the zipfile manipulation: that on...

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simensma
by New Contributor II
  • 1938 Views
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Resolved! Autoload files in wide table format, but store it unpivot in Streaming Table

Hey, I get wide table format in csv file. Where each sensor have its own column. I want to store it in Delta Live Streaming Table. But since it is inefficient to process it and storage space, due to varying frequency and sensor amount. I want to tran...

  • 1938 Views
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Latest Reply
Vartika
Databricks Employee
  • 1 kudos

Hi @Simen Småriset​,Hope everything is going great.Just wanted to check in if you were able to resolve your issue. If yes, would you be happy to mark an answer as best so that other members can find the solution more quickly? If not, please tell us s...

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matkap
by New Contributor II
  • 6006 Views
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In the VSCode Databricks Extension how can one specify notebook parameters to a pass to a workflow job?

I have successfully used the VSCode extension for Databricks to run a notebook on a cluster from my IDE. However in order to test effectively without changing the source, I need a way to pass parameters to the workflow job.I have tried various ways ...

  • 6006 Views
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AsphaltDataRide
New Contributor III
  • 2 kudos

@matthew kaplan​ I am not using widgets but what works is running it by pressing F5 in the python file you want to run.

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RPalmer
by New Contributor III
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Issue with connection our Alation instance to Azure Databricks using the Unity Catalog OCF connector

When we try and do the above I am able to get the list of schemas. But when I select one to injest we are then getting issue due to it trying to access system.lineage.table_lineage. When I look in the System catalog I can only see a schema called inf...

  • 2136 Views
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Latest Reply
RPalmer
New Contributor III
  • 5 kudos

We are working with an agency that is a Databricks partner if that is what you mean.

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