nerdexam
Microsoft

DP-700 · Question #108

You have a Fabric workspace that contains a write-intensive warehouse named DW1. DW1 stores staging tables that are used to load a dimensional model. The tables are often read once, dropped, and…

The correct answer is D. Disable V-Order. To minimize the load time for write-intensive staging tables in a Fabric Warehouse that are read once, dropped, and recreated, you should disable V-Order.

Design and implement data ingestion and transformation

Question

You have a Fabric workspace that contains a write-intensive warehouse named DW1. DW1 stores staging tables that are used to load a dimensional model. The tables are often read once, dropped, and then recreated to process new data. You need to minimize the load time of DW1. What should you do?

Exhibit

DP-700 question #108 exhibit

Options

  • AEnable V-Order.
  • BCreate statistics.
  • CDrop statistics.
  • DDisable V-Order.

How the community answered

(32 responses)
  • A
    3% (1)
  • B
    6% (2)
  • C
    16% (5)
  • D
    75% (24)

Why each option

To minimize the load time for write-intensive staging tables in a Fabric Warehouse that are read once, dropped, and recreated, you should disable V-Order.

AEnable V-Order.

Enabling V-Order adds processing overhead during writes to optimize reads, which is counterproductive for write-intensive, transient tables and would increase load time.

BCreate statistics.

Creating statistics helps the query optimizer for read performance, but it doesn't directly minimize the load (write) time for these types of staging tables.

CDrop statistics.

Dropping statistics doesn't address the write-time overhead introduced by V-Order, which is the primary factor impacting load time for this scenario.

DDisable V-Order.Correct

V-Order is a write-time optimization feature that sorts and encodes data to improve subsequent read performance, but it introduces overhead during the write operation itself. For write-intensive staging tables that are frequently dropped and recreated after being read only once, this write-time overhead is not beneficial for read performance and disabling V-Order will reduce the write (load) time.

Concept tested: Fabric Warehouse V-Order optimization - write-intensive workloads

Source: https://learn.microsoft.com/en-us/fabric/data-warehousing/v-order

Topics

#Microsoft Fabric#Data Warehouse Optimization#V-Order#Data Loading Performance

Community Discussion

No community discussion yet for this question.

Full DP-700 Practice