When planning for system resilience and uninterrupted operations, what is a recommended practice to apply within a geographic area that contains one or more data centers?
Positioning resources in locations typically utilized for caching content
Distributing resources across different worldwide geographical areas
Centralizing resources into a single data center to streamline operations
Spreading resources across multiple physically separated data centers but within the same geographical area
To ensure system resilience and uninterrupted operations within a geographical area, spreading resources across multiple, distinct data centers separated by physical distance yet interconnected via low-latency links is essential. These individual data centers, referred to as Availability Zones, provide the ability to run applications and databases in a highly available fashion. Utilizing just a singular location would not offer redundancy in case of a localized disruption, and while different worldwide geographical areas, which are larger than a city or area within a city, could be used for other purposes like geo-redundancy or data sovereignty, they do not offer the same immediacy of failover for high availability. Similarly, locations typically utilized for caching content closer to users are not utilized to achieve high availability for applications.
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