Exam VMCE v12 topic 1 question 151 discussion

Option A (Correct): By increasing the block size from the default (often 1MB) to a larger size like 4MB, Veeam will process the backup data in larger chunks. This directly results in fewer, larger blocks being written to the backup files, which translates to fewer objects being created in the object storage repository. This precisely matches the vendor's best practice for performance. Note: In the job settings, this is typically controlled by changing the Storage optimization setting to Local target (large blocks).

https://www.veeam.com/kb4470 Option 1: Reduce the Quantity of Blocks by Increasing Block Size To decrease the number of API calls, consider increasing the block size (Storage Optimization) of the backup files generated by jobs that perform direct backups to immutable object storage. Increasing the block size used when creating the backup files will reduce the number of blocks involved in the immutability extension process but will increase the size of the incremental restore points (on average, twice as large). The tradeoff with this method is fewer API calls but more storage usage. Remember that changing the block size (Storage Optimization) used by a backup job will only take effect during the next Active Full backup session. Additionally, if backup copy jobs target the immutable object storage, the block size change must be implemented in the source backup jobs first, followed by forcing an Active Full backup in both the source backup and backup copy jobs.