Exam 70-767 topic 1 question 130 discussion

Actual exam question from Microsoft's 70-767

Question #: 130
Topic #: 1

Note: This question is part of a series of questions that use the same or similar answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in this series. Information and details provided in a question apply only to that question.
You are a database administrator for an e-commerce company that runs an online store. The company has the databases described in the following table.

Each month, eight partner companies send your company comma-separated values (CSV) files that contain their sales data.
You need to create a Microsoft SQL Server Integration Services (SSIS) package to load the CSV files in parallel to a single table in DB2. You must minimize the number of transformation steps that are required.
What should you use?

A. Lookup transformation
B. Merge transformation
C. Merge Join transformation
D. MERGE statement
E. Union All transformation
F. Balanced Data Distributor transformation
G. Sequential container
H. Foreach Loop container

Show Suggested Answer

Suggested Answer: F 🗳️
The Balanced Data Distributor (BDD) transformation takes advantage of concurrent processing capability of modern CPUs. It distributes buffers of incoming rows uniformly across outputs on separate threads. By using separate threads for each output path, the BDD component improves the performance of an SSIS package on multi-core or multi-processor machines.
References:
https://docs.microsoft.com/en-us/sql/integration-services/data-flow/transformations/balanced-data-distributor-transformation

by commerceca at Jan. 13, 2020, 10:18 p.m.

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commerceca

Highly Voted 5 years, 3 months ago

E. Since the scenario is to load the CSV files from eight companies in parallel to a single table in DB2.

upvoted 9 times

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DudeHere

Most Recent 4 years, 5 months ago

Union All: The Union All transformation combines multiple inputs into one output. For example, the outputs from five different Flat File sources can be inputs to the Union All transformation and combined into one output. https://docs.microsoft.com/en-us/sql/integration-services/data-flow/transformations/union-all-transformation?view=sql-server-ver15 if you are importing data to one destination table, BDD may be useless. However, if you are importing data to a staging database, it may improve the data import performance. https://www.sqlshack.com/ssis-balanced-data-distributor-overview/

upvoted 2 times

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ialberto

4 years, 11 months ago

Correct is E

upvoted 3 times

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Lex_P

5 years ago

Balanced Data Distributor spreads data over multiple destinations, quite the opposite of what we're trying to achieve here. I would say E is correct

upvoted 3 times

als2kool

5 years ago

MS states you need a Union all after BDD to do send the results to a single database