What kernel module provides transparent control data compression when VDO is installed?

The kvdo module is responsible for providing transparent control data compression when VDO (Variable Deduplication and Optimization) is installed. This module is essential for the efficient operation of VDO, as it enables the compression and deduplication of data on block storage devices. By handling control data compression transparently, the kvdo module allows underlying applications and services to interact with storage systems without needing to be aware of the data optimization processes in place.

In environments where efficient storage management is critical, the kvdo module plays a vital role in reducing the amount of data stored on disk, leading to better storage utilization and potentially improved performance. The other options, while they might represent different functionalities or modules in the kernel, do not specifically relate to the transparent control data compression aspect that the kvdo module provides within the context of VDO.