Answer-first summary for fast verification
Answer: Use optimized writes to minimize data shuffling during writes.
Using optimized writes can help to reduce the number of small files by ensuring that data is written in a way that minimizes fragmentation. Additionally, compaction techniques can be used to merge small files into larger ones, which can improve query performance by reducing the overhead associated with reading a large number of small files.
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Consider a scenario where a SQL query is taking an unusually long time to execute due to a large number of small files in a Delta table. Explain how you would identify this issue and what steps you would take to resolve it. Specifically, discuss the use of optimized writes and compaction techniques.
A
Use optimized writes to minimize data shuffling during writes.
B
Increase the number of partitions in the Delta table.
C
Compress the Delta table files to reduce their size.
D
Use data skipping techniques to reduce the amount of data read.
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