ISC2 Certified Cloud Security Professional (CCSP) Practice Question
A cloud architect must design a private-cloud environment so that customer workloads keep running even if a complete fault domain-defined as the loss of one building's power, cooling, and core network-goes offline. The organization can afford only two buildings 800 meters apart on the same campus; each has its own utility feed, generators, cooling plant, and diverse Internet circuits. Which of the following designs best satisfies the availability requirement without adding a third site?
Run all production in Building A and replicate hourly backups to Building B for disaster-recovery purposes.
Build an active-passive cluster between the two buildings that uses asynchronous storage replication and requires an administrator-initiated failover.
Implement a stretched active-active compute cluster with synchronous storage replication and automatic cross-site failover between the two buildings.
Install dual PDUs in every rack but power them from the same on-site generators within each individual building.
A stretched active-active cluster with synchronous data replication places live workload instances in both buildings and keeps storage fully consistent. If either building is lost, the surviving site already hosts up-to-date data and running VMs, so automated quorum logic can immediately maintain service without data loss. By contrast, the designs that rely on asynchronous replication or manual recovery (active-passive cluster, scheduled backups, or DNS cut-over) introduce failover delays and potential data loss, while dual-PDU racks within one building remain inside the same fault domain and would be taken down by a whole-building failure.
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ISC2 Certified Cloud Security Professional (CCSP)
Cloud Platform & Infrastructure Security
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