Delta Live Tables properties reference

This article provides a reference for Delta Live Tables JSON setting specification and table properties in Azure Databricks. For more details on using these various properties and configurations, see the following articles:

• Configure a Delta Live Tables pipeline
• Pipelines REST API

Delta Live Tables pipeline configurations

Fields
id Type: string A globally unique identifier for this pipeline. The identifier is assigned by the system and cannot be changed.
name Type: string A user-friendly name for this pipeline. The name can be used to identify pipeline jobs in the UI.
storage Type: string A location on DBFS or cloud storage where output data and metadata required for pipeline execution are stored. Tables and metadata are stored in subdirectories of this location. When the storage setting is not specified, the system will default to a location in dbfs:/pipelines/. The storage setting cannot be changed after a pipeline is created.
configuration Type: object An optional list of settings to add to the Spark configuration of the cluster that will run the pipeline. These settings are read by the Delta Live Tables runtime and available to pipeline queries through the Spark configuration. Elements must be formatted as key:value pairs.
libraries Type: array of objects An array of notebooks containing the pipeline code and required artifacts.
clusters Type: array of objects An array of specifications for the clusters to run the pipeline. If this is not specified, pipelines will automatically select a default cluster configuration for the pipeline.
development Type: boolean A flag indicating whether to run the pipeline in development or production mode. The default value is true
notifications Type: array of objects An optional array of specifications for email notifications when a pipeline update completes, fails with a retryable error, fails with a non-retryable error, or a flow fails.
continuous Type: boolean A flag indicating whether to run the pipeline continuously. The default value is false.
target Type: string The name of a database for persisting pipeline output data. Configuring the target setting allows you to view and query the pipeline output data from the Azure Databricks UI.
channel Type: string The version of the Delta Live Tables runtime to use. The supported values are: - preview to test your pipeline with upcoming changes to the runtime version. - current to use the current runtime version. The channel field is optional. The default value is current. Databricks recommends using the current runtime version for production workloads.
edition Type string The Delta Live Tables product edition to run the pipeline. This setting allows you to choose the best product edition based on the requirements of your pipeline: - CORE to run streaming ingest workloads. - PRO to run streaming ingest and change data capture (CDC) workloads. - ADVANCED to run streaming ingest workloads, CDC workloads, and workloads that require Delta Live Tables expectations to enforce data quality constraints. The edition field is optional. The default value is ADVANCED.
photon Type: boolean A flag indicating whether to use What is Photon? to run the pipeline. Photon is the Azure Databricks high performance Spark engine. Photon-enabled pipelines are billed at a different rate than non-Photon pipelines. The photon field is optional. The default value is false.
pipelines.maxFlowRetryAttempts Type: int If a retryable failure occurs during a pipeline update, this is the maximum number of times to retry a flow before failing the pipeline update Default: Two retry attempts. When a retryable failure occurs, the Delta Live Tables runtime attempts to run the flow three times, including the original attempt.
pipelines.numUpdateRetryAttempts Type: int If a retryable failure occurs during an update, this is the maximum number of times to retry the update before permanently failing the update. The retry is run as a full update. This parameter applies only to pipelines running in production mode. Retries are not attempted if your pipeline runs in development mode or when you run a Validate update. Default: - Five for triggered pipelines. - Unlimited for continuous pipelines.

Delta Live Tables table properties

In addition to the table properties supported by Delta Lake, you can set the following table properties.

Table properties
pipelines.autoOptimize.managed Default: true Enables or disables automatically scheduled optimization of this table.
pipelines.autoOptimize.zOrderCols Default: None An optional string containing a comma-separated list of column names to z-order this table by. For example, pipelines.autoOptimize.zOrderCols = "year,month"
pipelines.reset.allowed Default: true Controls whether a full refresh is allowed for this table.

Pipelines trigger interval

You can specify a pipeline trigger interval for the entire Delta Live Tables pipeline or as part of a dataset declaration. See Set trigger interval for continuous pipelines.

pipelines.trigger.interval

The default is based on flow type: - Five seconds for streaming queries. - One minute for complete queries when all input data is from Delta sources. - Ten minutes for complete queries when some data sources may be non-Delta. The value is a number plus the time unit. The following are the valid time units: - second, seconds - minute, minutes - hour, hours - day, days You can use the singular or plural unit when defining the value, for example: - {"pipelines.trigger.interval" : "1 hour"} - {"pipelines.trigger.interval" : "10 seconds"} - {"pipelines.trigger.interval" : "30 second"} - {"pipelines.trigger.interval" : "1 minute"} - {"pipelines.trigger.interval" : "10 minutes"} - {"pipelines.trigger.interval" : "10 minute"}

Cluster attributes that are not user settable

Because Delta Live Tables manages cluster lifecycles, many cluster settings are set by Delta Live Tables and cannot be manually configured by users, either in a pipeline configuration or in a cluster policy used by a pipeline. The following table lists these settings and why they cannot be manually set.

Fields
cluster_name Delta Live Tables sets the names of the clusters used to run pipeline updates. These names cannot be overridden.
data_security_mode access_mode These values are automatically set by the system.
spark_version Delta Live Tables clusters run on a custom version of Databricks Runtime that is continually updated to include the latest features. The version of Spark is bundled with the Databricks Runtime version and cannot be overridden.
autotermination_minutes Because Delta Live Tables manages cluster auto-termination and reuse logic, the cluster auto-termination time cannot be overridden.
runtime_engine Although you can control this field by enabling Photon for your pipeline, you cannot set this value directly.
effective_spark_version This value is automatically set by the system.
cluster_source This field is set by the system and is read-only.
docker_image Because Delta Live Tables manages the cluster lifecycle, you cannot use a custom container with pipeline clusters.
workload_type This value is set by the system and cannot be overridden.