After an index is created in HyperSpace, several actions can be performed on it like Refresh the index if the underlying data changes Delete if the index is not needed Vacuum if an index is no longer needed What do you mean by vacuum index?
Click on the arrows to vote for the correct answer
A. B. C. D. E.Correct Answer: C
Vacuuming an index means performing a hard delete i.e.
removing files and the metadata entry completely for that index using the vacuumIndex command.Option A is incorrect.
Vacuum the index does not mean to delete only the content.
Option B is incorrect.
Vacuum the index does not mean to restructure the index.
Option C is correct.
Vacuum the index means physical deletion of the index contents and related metadata completely from Hyperspace's metadata.
Option D is incorrect.
Vacuum the index deletes not only data but also metadata.
Option E is incorrect.
Updating the index is not the right answer.
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In Hyperspace, a vacuum operation refers to the physical deletion of an index's contents and associated metadata from Hyperspace's metadata store. The vacuum operation is used when an index is no longer needed and must be completely removed from the Hyperspace system to free up resources.
When an index is created in Hyperspace, it is stored in the metadata store along with its associated metadata, such as the index schema, column statistics, and partitioning scheme. These metadata are used by Hyperspace to maintain and query the index efficiently.
Over time, the underlying data that an index is built on may change, and the index may no longer be needed. In this case, it is essential to remove the index completely to free up resources in the system. This is where the vacuum operation comes into play.
When the vacuum operation is executed on an index in Hyperspace, it physically deletes the index's contents and associated metadata from the metadata store. This ensures that all resources used by the index are freed up, and the Hyperspace system can be used for other purposes.
In summary, vacuuming an index in Hyperspace means physically deleting its contents and associated metadata from the Hyperspace metadata store, freeing up resources in the system.