Which of the following is NOT a common method for optimizing cloud storage costs? (Select One)

Multi-region replication is a strategy designed for high availability, disaster recovery, and reducing latency for globally distributed users. It involves creating and maintaining copies of data in two or more distinct geographic regions. This practice inherently increases storage costs because multiple copies of the data are stored and paid for, along with potential data transfer costs between regions. While critical for resilience, it is fundamentally a cost-adding feature, not a cost-optimization method. The other options—compression, lifecycle policies, and deduplication—are all direct techniques to reduce the volume of stored data or its associated cost per gigabyte.

A. Compressing data before storage reduces the file size, which directly lowers the amount of capacity required and thus reduces storage costs.
C. Implementing object lifecycle policies is a core FinOps practice that automates moving data to cheaper storage tiers or deleting it, significantly optimizing costs over time.
D. Data deduplication is a technique that eliminates redundant copies of data, thereby reducing the total storage footprint and its associated costs.

1. FinOps Foundation, "Cloud FinOps, Second Edition" by J.R. Storment, Mike Fuller, Corey Quinn: Chapter 10, "Managing Cloud Cost," discusses various optimization techniques. It highlights lifecycle management and choosing appropriate storage tiers as key cost-saving measures. In contrast, features like multi-region replication are discussed in the context of architectural choices that impact cost, often increasing it for the benefit of resilience.

2. AWS Documentation, "Amazon S3 cost optimization for performance and resilience": This official guide states, "Cross-Region Replication (CRR) can be used to copy objects across Amazon S3 buckets in different AWS Regions... CRR can help you meet compliance requirements, minimize latency, and increase operational efficiency." The document clarifies that you pay for storage in the destination region and for inter-region data transfer, confirming it is an added cost for resilience, not a cost-saving method. (See the "Replication" section).

3. Google Cloud Documentation, "Best practices for Cloud Storage cost optimization": This document details methods like "Deleting unused data with Object Lifecycle Management" and "Using the appropriate storage class." It also explains that Multi-Region Storage, which provides geo-redundancy, has a higher at-rest storage price than Regional Storage. (See the "Pricing" and "Lifecycle Management" sections).

4. Microsoft Azure Documentation, "Plan and manage costs for Azure Blob Storage": This source explains, "Data redundancy options include locally-redundant storage (LRS), zone-redundant storage (ZRS), geo-redundant storage (GRS), and geo-zone-redundant storage (GZRS)... Geo-redundant options provide the highest level of durability at a higher cost." This explicitly positions geo-replication (multi-region) as a premium, higher-cost option for durability. (See the "Data redundancy" section).