Which of the following de-duplication techniques will require less processing power on the host but more initial disk space on the storage array?

Single instance storage (SIS) is a form of de-duplication that stores only one copy of files with identical content, but the term does not specify when the de-duplication occurs (inline or post-process) and is a more general concept.

Inline de-duplication processes and de-duplicates data before it is written to disk, which requires more processing power on the host during the write operation but uses less initial disk space.

Agent-based de-duplication refers to the method of implementation (e.g., software agent on the host), not the timing of the de-duplication process (inline vs. post-process) or its impact on host processing and initial disk space.

Post-process de-duplication writes all incoming data directly to the storage array without immediate de-duplication, which means the host experiences less processing overhead during the initial write operation. After the data is written, a separate background process scans the storage array to identify and eliminate redundant data. This approach requires more initial disk space because un-de-duplicated data is stored until the post-processing job completes, but it frees up the host's processing power during active data writes.