An architect is designing for a VMware Cloud Foundation (VCF) workload domain to use vSAN,...

A and C directly support predictable storage performance for burst-heavy analytics workloads.

C is correct because the vSAN Express Storage Architecture (ESA) Adaptive Write Path dynamically selects an optimized write path when workloads generate large I/O or high outstanding I/O. Broadcom explains that this reduces write amplification, CPU processing, and network traffic while increasing throughput. Later ESA enhancements further improve write-intensive workloads by dynamically increasing parallelism, producing higher IOPS, higher throughput, and lower latency under demanding conditions. ( VMware Blogs )

A is also correct. Consistent hardware generations and balanced ReadyNode specifications provide predictable performance across the distributed vSAN cluster. Broadcom notes that node uniformity is an important clustering principle because asymmetric hosts can create resource bottlenecks and inconsistent behavior during both normal and failure conditions. ESA performance is strongly dependent on the CPU, NVMe devices, NICs, and networking available on each participating host. ( VMware Blogs )

B is incorrect because disabling automatic rebalancing avoids redistribution rather than ensuring sustained performance while balancing occurs; vSAN ' s adaptive mechanisms are intended to manage resync and workload traffic concurrently. D is an OSA capacity-efficiency setting rather than the optimal performance architecture. E introduces OSA RAID-6 write overhead, whereas ESA is specifically optimized to deliver efficient erasure coding with substantially better performance characteristics. ( VMware Blogs )

Study Guide References/Topics: vSAN ESA; Adaptive Write Path; vSAN Performance Design; Homogeneous Cluster Hardware; ReadyNode Sizing; Rebalancing and Resynchronization; Analytics Workload Performance.