Columnstore Table Archival Compression Method
Question
You are working on a Columnstore table.
Although the columnstore indexes and tables are saved with the columnstore compression always, you are interested in further decreasing the columnstore data size.
For this purpose, you decide to configure an add-on compression known as archival compression.
Which of the following method would you use to compress the data by using the archival compression?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D. E.Correct Answer: B
COLUMNSTORE_ARCHIVE data compression is used to compress columnstore data with the help of archival compression.
For example:
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Option A is incorrect.
COLUMNSTORE data compression is used to decompress the archival compression.
Option B is correct.
COLUMNSTORE_ARCHIVE data compression is used to compress columnstore data using archival compression.
Option C is incorrect.
There is no valid method like COLUMNSTORE_COMPRESS.
Option D is incorrect.
The right method is COLUMNSTORE_ARCHIVE, not COLUMNSTORE_ARCHIVECOMPRESS.
Option E is incorrect.
Archival compression can be configured for the columnstore data.
It will further decrease the columnstore data size.
Reference:
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Columnstore tables in Microsoft Azure are designed to efficiently store and manage large amounts of data by organizing data into columns instead of rows, allowing for faster analytical queries. These tables are compressed by default with columnstore compression, but you can further decrease their size by configuring an add-on compression known as archival compression.
To configure archival compression for a columnstore table in Azure, you need to use the COLUMNSTORE_ARCHIVE option. This option applies additional compression algorithms to the data in the columnstore table, reducing the overall size of the data on disk.
The other options listed in the question are not valid options for configuring archival compression. The COLUMNSTORE option refers to the default columnstore compression that is already applied to the table. The COLUMNSTORE_COMPRESS option is used to force compression of a columnstore index or partition, but it does not enable archival compression. The COLUMNSTORE_ARCHIVECOMPRESS option is not a valid option.
Therefore, the correct answer to the question is B. COLUMNSTORE_ARCHIVE.
It's worth noting that enabling archival compression may come at the cost of query performance, as additional CPU resources will be required to decompress the data during query execution. You should carefully consider the trade-off between storage savings and query performance before enabling archival compression on your columnstore tables.