Which statement describes Delta Lake Auto Compaction?

The correct answer is E. An asynchronous job runs after the write completes to detect if files could be further compacted; if. This is the correct answer because it describes the behavior of Delta Lake Auto Compaction, which is a feature that automatically optimizes the layout of Delta Lake tables by coalescing small files into larger ones. Auto Compaction runs as an asynchronous job after a write to a t

Delta Lake Features and Performance Optimization

Question

Options

AAn asynchronous job runs after the write completes to detect if files could be further compacted; if
BBefore a Jobs cluster terminates, optimize is executed on all tables modified during the most
COptimized writes use logical partitions instead of directory partitions; because partition boundaries
DData is queued in a messaging bus instead of committing data directly to memory; all data is
EAn asynchronous job runs after the write completes to detect if files could be further compacted; if

How the community answered

(30 responses)

A
3% (1)
C
3% (1)
E
93% (28)

Explanation

This is the correct answer because it describes the behavior of Delta Lake Auto Compaction, which is a feature that automatically optimizes the layout of Delta Lake tables by coalescing small files into larger ones. Auto Compaction runs as an asynchronous job after a write to a table has succeeded and checks if files within a partition can be further compacted. If yes, it runs an optimize job with a default target file size of 128 MB. Auto Compaction only compacts files that have not been compacted previously.

Topics

#Delta Lake#Auto Compaction#Data Optimization#File Management

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