VMware vSAN Storage

Overview

VMware vSAN is VMware’s software-defined storage (SDS) solution that aggregates local disks from ESXi hosts into a shared, distributed datastore.

Virtual storage area network (VSAN) associated with IaaS Dual site.Which is object-based, software-defined, enterprise-class shared storage that runs directly on vSphere ESXi hosts. It clusters local flash devices (SSD) from multiple servers into a single, high-performance datastore, eliminating the need for traditional external SAN storage.

Unlike traditional block/file storage, vSAN manages data as objects (e.g., virtual disks), allowing for granular, policy-driven management (RAID, performance, snapshots) on a per-VM basis.

Single site / Mono cluster Service Class

Several types of vSan configuration are available for the Customer to choose from and are shown in the table below

Storage Class	Site	Primary level of failures to tolerate (FTT) = Site tolerance Setting	Secondary of failures to tolerate (SFTT) = Local Failures to Tolerate	Failure tolerance method	IOPS limit for object
Silver RAID5	Mono	NA	1	RAID-5	1200
Silver RAID6	Mono	NA	1	RAID-6	1200
Gold RAID5	Mono	NA	1	RAID-5	2000
Gold RAID6	Mono	NA	1	RAID-6	2000
Platinum 6k RAID6	Mono	NA	1	RAID-6	6000
Platinum 14k RAID6	Mono	NA	1	RAID-6	14000

The Primary FTT parameter defines protection against site-level failures in multi-site or stretched cluster configurations. In a mono-site deployment, where only a single site is available:

• FTT is not applicable (N/A), as there is no secondary site for replication.
• Site-level resilience cannot be defined in the absence of geographic distribution.

Dual site / Stretched cluster Service Class

Storage Class	Site	Primary level of failures to tolerate (FTT) = Site tolerance Setting	Secondary of failures to tolerate (SFTT) = Local Failures to Tolerate	Failure tolerance method	IOPS limit for object
Silver RAID0	Dual	1	NA	RAID-0	1200
Silver RAID5	Dual	1	1	RAID-5	1200
Gold RAID0	Dual	1	NA	RAID-0	2000
Gold RAID5	Dual	1	1	RAID-5	2000
Platinum 6k RAID5	Dual	1	1	RAID-5	6000
Platinum 14k RAID5	Dual	1	1	RAID-5	14000
Platinum 14k RAID1	Dual	1	1	RAID-1	14000

The Secondary FTT parameter defines the the number of failures within a site that can be tolerated. protection against site-level failures in multi-site or stretched cluster configurations. In a mono-site deployment, where only a single site is available:

• SFTT = 1 → Within each site, data is protected against a single host or disk failure.
• Site-level resilience cannot be defined in the absence of geographic distribution.

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