Design Cost-Optimized Architectures

Log files in S3 are accessed frequently for the first 30 days, then rarely, and are kept for years. Which approach minimizes storage cost over the data's lifetime with the least ongoing effort?

• AKeep every object in S3 Standard for the entire retention period.
• BManually copy objects to cheaper classes when someone remembers to.
• CA lifecycle policy that transitions objects to cheaper classes over time.
• DDelete the logs after 30 days to avoid paying for long-term storage.

A lifecycle policy automatically transitions aging objects to lower-cost classes (for example, Standard-IA then Glacier), minimizing cost with no manual work. Keeping everything in Standard is expensive, manual copying is unreliable, and deleting violates the retention requirement.

Long-term EBS snapshot retention is driving up storage cost. Which TWO actions reduce snapshot cost while retaining what is needed? (Select TWO.)

• AMove rarely restored snapshots to the EBS Snapshot Archive tier.
• BUse a lifecycle policy to delete snapshots past their retention period.
• CConvert every old snapshot into a full EBS volume for faster access.
• DCopy all snapshots to another Region to keep extra copies available.
• EIncrease the size of the source volumes to consolidate the snapshots.

Archiving rarely restored snapshots and deleting those past retention with a lifecycle policy both lower snapshot cost. Converting to volumes, replicating everywhere, and enlarging source volumes all increase cost.