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Mado
by Valued Contributor II
  • 19079 Views
  • 5 replies
  • 5 kudos

What are the best practices for spark DataFrame caching?

Hi,When caching a DataFrame, I always use "df.cache().count()".However, in this reference, it is suggested to save the cached DataFrame into a new variable:When you cache a DataFrame create a new variable for it cachedDF = df.cache(). This will allow...

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best practice
cache
Dataframe
  • 19079 Views
  • 5 replies
  • 5 kudos
Latest Reply
Lakshay
Databricks Employee
  • 5 kudos

In addition to other comments, I will just add that make sure you do the cache only when necessary. i.e. if you need to save a data frame for a time being to be referenced later in the code, then you should consider doing a cache. But if your code ha...

  • 5 kudos
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KVNARK
by Honored Contributor II
  • 2257 Views
  • 0 replies
  • 2 kudos

Databricks Community rewards portal is down

When can we expect the Databricks Community rewards portal to be up and running. The page shows the warning message as website is under construction. Attached the screen shot of the message for your reference. Kindly resolve the issue and reload the ...

KVNARK_0-1689834615331.png
  • 2257 Views
  • 0 replies
  • 2 kudos
Mado
by Valued Contributor II
  • 5171 Views
  • 4 replies
  • 3 kudos

Resolved! What is the best approach to display DataFrame without re-executing the logic each time we display?

Hi,I have a DataFrame and different transformations are applied on the DataFrame. I want to display DataFrame after several transformations to check the results.  However, according to the Reference, every time I try to display results, it runs the e...

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cache
Dataframe
display
  • 5171 Views
  • 4 replies
  • 3 kudos
Latest Reply
Mado
Valued Contributor II
  • 3 kudos

Thanks.In this reference, it is suggested to save the cached DataFrame into a new variable:When you cache a DataFrame create a new variable for it cachedDF = df.cache(). This will allow you to bypass the problems that we were solving in our example, ...

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RitwikSahay
by New Contributor
  • 1988 Views
  • 1 replies
  • 1 kudos

Uable to Connect to S3

ExecutionException: java.nio.file.AccessDeniedException: s3a://bucketName: Forbidden;Hadoop 3.3.4, aws-sdk-java/1.12.189 Linux/5.15.0-1038-aws OpenJDK_64-Bit_Server_VM/25.362-b09 java/1.8.0_362 scala/2.12.14 kotlin/1.6.0 vendor/Azul_Systems,_Inc. cfg...

  • 1988 Views
  • 1 replies
  • 1 kudos
Latest Reply
Atanu
Databricks Employee
  • 1 kudos

https://kb.databricks.com/en_US/security/forbidden-access-to-s3-datahttps://kb.databricks.com/en_US/delta/s3-permissions-delta You can check this two. see if this helps.

  • 1 kudos
415963
by New Contributor II
  • 1337 Views
  • 0 replies
  • 0 kudos

Not able to catch structured streaming exception

I would like to catch and handle an exception in a structured streaming job.The databricks notebook still displays the exception, regardless of added exception handling (see attached screenshot)I guess that the exception is displayed by the cell outp...

  • 1337 Views
  • 0 replies
  • 0 kudos
Dave-Griffith
by New Contributor
  • 1058 Views
  • 1 replies
  • 0 kudos

Using Dolly for healthcare providers

Databricks Data+AI Summit has been very interesting. New(ish) user here with a background on healthcare. I see huge efficiency gains for healthcare providers in using specialized LLMs to get a synopsis of patient history. Would a provider need to tra...

  • 1058 Views
  • 1 replies
  • 0 kudos
Latest Reply
valeryuaba
New Contributor III
  • 0 kudos

Hey everyone! As a healthcare enthusiast, I completely agree with Dave-Griffith's point about the potential efficiency gains in using specialized LLMs for patient history. It's amazing how advanced technology like Dolly can revolutionize healthcare.T...

  • 0 kudos
asgalantsevepam
by New Contributor II
  • 1255 Views
  • 2 replies
  • 5 kudos

Unable to login into partner account

@Anonymous , @Retired_mod , Could you please help me?Several days ago I was able to log into Databricks Partner portal but now I can't and even resetting password is not helping.Thanks in advance.

  • 1255 Views
  • 2 replies
  • 5 kudos
Latest Reply
Anonymous
Not applicable
  • 5 kudos

Hi @asgalantsevepam  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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ari_reyes
by New Contributor II
  • 2042 Views
  • 3 replies
  • 4 kudos

Databricks Certification Exam got suspended

I had an issue when I was answering an exam for a certification. The exam was interrupted due to an issue on secure browser software, the screen became black and I could not finish the exame because I could not see the rest of the questions in the qu...

  • 2042 Views
  • 3 replies
  • 4 kudos
Latest Reply
Anonymous
Not applicable
  • 4 kudos

Hi @ari_reyes  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 answers yo...

  • 4 kudos
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Hydra
by New Contributor II
  • 1742 Views
  • 3 replies
  • 3 kudos

Unable to login to course

Hi I have signed up and looking to sign in the Course Generative AI in community, but when I log in using my correct password and username, it does not accept the information, so can't complete the course, can you please offer help for this.I have re...

  • 1742 Views
  • 3 replies
  • 3 kudos
Latest Reply
Anonymous
Not applicable
  • 3 kudos

Hi @Hydra  We haven't heard from you since the last response from @yogu , 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 others.  Also, Plea...

  • 3 kudos
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saqib_rasool
by New Contributor II
  • 2358 Views
  • 2 replies
  • 3 kudos

Databricks Lakehouse Fundamentals exam

Hi I completed Databricks Lakehouse Fundamentals exam but didn't got my badge

  • 2358 Views
  • 2 replies
  • 3 kudos
Latest Reply
yogu
Honored Contributor III
  • 3 kudos

@saqib_rasool plz submit tikcit to support team https://help.databricks.com/s/contact-us?ReqType=training

  • 3 kudos
1 More Replies
Ajay-Pandey
by Esteemed Contributor III
  • 3020 Views
  • 3 replies
  • 0 kudos

Databricks Pub-Sub Data Recon

I am trying to setup a recon activity between GCP Pub-Sub and databricks, Is there any way to fetch the last 24hrs record count from Pub-Sub?I tried but not got any direct solution for it, It will be great if any one can suggest me the way t#pubsub, ...

  • 3020 Views
  • 3 replies
  • 0 kudos
Latest Reply
Anonymous
Not applicable
  • 0 kudos

Hi @Ajay-Pandey  Hope you are well. Just wanted to see if you were able to find an answer to your question and would you like to mark an answer as best? It would be really helpful for the other members too. Cheers!

  • 0 kudos
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whleeman
by New Contributor III
  • 1597 Views
  • 1 replies
  • 3 kudos

Resolved! No "create catalog" option in workspace with metastore linked

I created a workspace and a metastore(following the long tedious instructions). I assigned the workspace to the metastore. workspace -> Data, I can see the metastore link on the top left of the page. Through it I configured the permissions (giving me...

  • 1597 Views
  • 1 replies
  • 3 kudos
Latest Reply
whleeman
New Contributor III
  • 3 kudos

Answering my own question - all that is needed is to refresh the Data web page! 

  • 3 kudos
vkuznetsov
by New Contributor III
  • 1173 Views
  • 1 replies
  • 0 kudos

Problem sharing a streaming table created in Delta Live Table via Delta Sharing

Hi all,I hope you could help me to figure out what I am missing.I'm trying to do a simple thing. To read the data from the data ingestion zone (csv files saved to Azure Storage Account) using the Delta Live Tables pipeline and share the resulting tab...

vkuznetsov_0-1689259588838.png 2023_07_13_16_48_52_Data_Explorer.png
  • 1173 Views
  • 1 replies
  • 0 kudos
Latest Reply
vkuznetsov
New Contributor III
  • 0 kudos

Sorry, I think I've created the post in the wrong thread. Created the same post in the Community Cove.

  • 0 kudos

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