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Machine Learning
Dive into the world of machine learning on the Databricks platform. Explore discussions on algorithms, model training, deployment, and more. Connect with ML enthusiasts and experts.
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Forum Posts

NAS
by New Contributor III
  • 3314 Views
  • 5 replies
  • 1 kudos

How can I use the feature store for time series out of sample prediction?

For instance, have a new model trained every Saturday with training data up to the previous Fri, and use such model to predict daily the following week?In the same context, if the features are keyed by date, could I create a training set with a diffe...

  • 3314 Views
  • 5 replies
  • 1 kudos
Latest Reply
sean_owen
Databricks Employee
  • 1 kudos

In this case, you just want your feature store to have a timestamp column as a timestamp key. You would compute your features as of whatever dates you like and add them as features, and those are used to train. At runtime, to make a prediction as of ...

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mhansinger
by New Contributor II
  • 1799 Views
  • 1 replies
  • 1 kudos

Resolved! Get FeatureStore write date

Hi,is there a way to get the time stamp of the last update of a feature store table with the feature store client API? The creation time stamp can be querried as: feature_store.FeatureStoreClient().get_feature_table(name="my.table").creation_timestam...

  • 1799 Views
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Latest Reply
sean_owen
Databricks Employee
  • 1 kudos

(The question is about querying table metadata, not creating one)I can confirm that there isn't a way to query this, not that I can see in the current API in 10.2

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MoJaMa
by Databricks Employee
  • 1065 Views
  • 1 replies
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Latest Reply
MoJaMa
Databricks Employee
  • 0 kudos

Data is stored in the control plane. Metadata (eg feature table descriptions, column types, etc) is stored in the control plane. The location where the Delta table is stored is determined by the database location. The customer could call  CREATE DATA...

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User16789201666
by Databricks Employee
  • 1461 Views
  • 1 replies
  • 0 kudos

When would you use the Feature Store?

For example would you use a feature store on your raw data or what's is the granularity of the features in the store?

  • 1461 Views
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Latest Reply
Joseph_B
Databricks Employee
  • 0 kudos

I'll try to answer the broad question first, followed by the specific ones.When would you use the Feature Store?A Feature Store is primarily used to solve 2 challenges.(1) Discoverability and governance of featuresChallenge: In a large team or organi...

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Anonymous
by Not applicable
  • 1719 Views
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Latest Reply
sajith_appukutt
Honored Contributor II
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The feature store has both online / offline components. The offline feature store is used for feature discovery, model training, and batch inference and is backed by  Delta tables. You could read/write to offline store from Databricks clusters that...

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User16789201666
by Databricks Employee
  • 3414 Views
  • 1 replies
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When should we use offline store vs online store for Feature Store?

Looking at the docs we see both options, can we use both e.g.?

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Latest Reply
User16789201666
Databricks Employee
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Online store is for real time inferencing, in most case you will use the offline store.

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