Home » Oracle » 1z0-027 » Where the compression and decompression can be done.
You are using Hybrid Columnar Compression for a table stored in a tablespace that is contained in an Exadata-based ASM diskgroup. Identify three statements that correctly explain where the compression and decompression can be done.
A. Decompression can be done on the database servers.
B. Compression can be done on the Exadata storage servers.
C. Compression can be done on the database servers.
D. Decompression can be done on the Exadata storage servers.
Correct Answer: ACD
Explanation/Reference:
* decompression
/ Queries run directly on Hybrid Columnar Compressed data does not require the data to be decompressed
/ Data that is required to satisfy a query predicate does not need to be decompressed; only the columns and rows being returned to the client are decompressed in memory
/ The decompression process typically takes place on the Oracle Exadata Storage Server in order to maximize performance and offload processing from the database server.
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