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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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User16790091296
by • Contributor II
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Some Tips & Tricks for Optimizing costs and performance (Clusters and Ganglia): [Note: This list is not exhaustive] Leverage the DataFrame or Spar...

Some Tips & Tricks for Optimizing costs and performance (Clusters and Ganglia):[Note: This list is not exhaustive]Leverage the DataFrame or SparkSQL API’s first. They use the same execution process resulting in parity in performance but they also com...

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Anonymous
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Resolved! Delta vs parquet

When does it make sense to use Delta over parquet? Are there any instances when you would rather use parquet?

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Ryan_Chynoweth
Esteemed Contributor
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Users should almost always choose Delta over parquet. Keep in mind that delta is a storage format that sits on top of parquet so the performance of writing to both formats is similar. However, reading data and transforming data with delta is almost a...

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Anonymous
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Resolved! What is difference between Action and Transformation in Spark?

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Ryan_Chynoweth
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An Action in Spark is any operation that does not return an RDD. Evaluation is executed when an action is taken. Actions trigger the scheduler, which build a directed acyclic graph (DAG) as a plan of execution. The plan of execution is created by wor...

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Anonymous
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Resolved! Converting between Pandas to Koalas

When and why should I convert b/w a Pandas to Koalas dataframe? What are the implications?

Data Engineering
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Ryan_Chynoweth
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Koalas is distributed on a Databricks cluster similar to how Spark dataframes are also distributed. Pandas dataframes only live on the spark driver in memory. If you are a pandas user and are using a multi-node cluster then you should use koalas to p...

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Anonymous
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Append subset of columns to target Snowflake table

I’m using the databricks-snowflake connector to load data into a Snowflake table. Can someone point me to any example of how we can append only a subset of columns to a target Snowflake table (for example some columns in the target snowflake table ar...

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Anonymous
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Detailed logs for R process

We have a user notebook in R that reliably crashes the driver. Are detailed logs from the R process stored somewhere on drivers/workers?

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User16790091296
by • Contributor II
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Resolved! How can I use a Python function defined in my git-repo module within the DB notebook?

I have a function within a module in my git-repo. I want to import that to my DB notebook - how can I do that?

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aladda
Honored Contributor II
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Databricks Repos allows you to sync your work in Databricks with a remote Git repository. This makes it easier to implement development best practices. Databricks supports integrations with GitHub, Bitbucket, and GitLab. Using Repos you can bring you...

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Anonymous
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Seeing all columns

I have a dataframe with a lot of columns (20 or so) and 8 rows. Part of the output is being cutoff and I can scroll to the right to see the rest of the columns but I was just wondering if it was possible to somehow "zoom out" of the table so I can se...

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