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Brief VSAN Functionality With Each Release

In the ever-evolving landscape of virtualization and software-defined storage, VMware vSAN has been a cornerstone solution, consistently enhancing the capabilities of modern data centers. Join us on a journey as we explore the evolution of vSAN through its various released versions, highlighting key features and improvements along the way.


vSAN 1.0 : Release on March 2014 : A Pioneering Start


vSAN 6.0 : Release on March 2015


  • All-Flash configurations

  • 64 host cluster scalability

  • 2x performance increase for hybrid configurations

  • New snapshot mechanism

  • Enhanced cloning mechanism

  • Fault domain/rack awareness


vSAN 6.1: Release on September 2015


  • Stretched clustering across a max of 5 ms RTT ( milliseconds)

  • 2-node vSAN for remote office , branch office (ROBO) soultions

  • vRealize Operations management pack

  • vSphere replications-5 minutes RPO

  • Health monitoring


vSAN 6.2 : Release on March 2016 (Striving for Operational Simplicity)


  • RAID 5 and 6 over the network ( erasure coding )

  • Space efficiency (deduplication and compression )

  • QoS - IOPS limits

  • Software checksums

  • IPv6 Support

  • Performance monitoring



  • vSAN iSCSI Service

  • vSAN 2-node Direct Connect

  • 512e device support

  • Cloud-Native Application support


vSAN 6.6 : Release on April 2017 (Unleashing Performance and Scalability)


  • Local Protection for Stretched Clusters

  • Removal of Multicast

  • ESXI Host Client (HTML5) management and monitoring functionality

  • Enhanced rebalancing , repairs , and resyncs

  • Resync throttling

  • Maintenance Mode Pre-check

  • Stretched Cluster Witness Replacement UI

  • vSAN Support Insight

  • vSAN Easy Install

  • vSAN Config Assist / Firmware Update

  • Enhanced Performance and Health Monitoring



  • Update Manager Integration

  • Performance Diagnostics added to Cloud Analytics

  • Storage Device Serviceability

  • New Licensing for ROBO and VDI


vSAN 6.7 : Release on April 2018 (Bridging the Gap to Hybrid Cloud)


  • HTML-5 User Interface support

  • Native vRealize Operations dashboards in the HTML5 Client

  • Support for Microsoft WSFC using vSAN iSCSI

  • Fast Network Failovers

  • Optimization Adaptive Resync

  • Optimization witness Traffic Separation for Stretched Clusters

  • Optimization Preferred Site Override for Stretched Clusters

  • Optimization Efficient Resync for Stretched Cluster

  • Optimization Enhanced Diagnostic Partition

  • Optimization Efficient Decommissioning

  • Optimization Efficient and consistent storage policies

  • 4k Native Device Support

  • FIPS 140-2 Level 1 Support



  • Trim/unmap

  • Cluster Quickstart Wizard

  • Mixed MTU Support

  • Historical Capacity Reporting

  • Additional vR Ops Dashboards

  • Enhanced support experience

  • Secondary FTT for Racks



  • Cloud-Native Storage

  • Native SCSI-3 PGR for windows Server Failover Cluster (WSFC) support

  • Improved Capacity Usage views (including block container volumes )

  • Improved Resync insights - ability to see queued but not yet active resyncs

  • Maintenance Mode/Data Migration pre-checks

  • Online iSCSI LUN Resize

  • Improved destage performance with LSOM enhancements

  • Parallel resync opertaions

  • vsantop command line tool for performance monitoring


vSAN 7.0 : Release on April 2020 (A Quantum Leap in Innovation)


  • Integrated Naive File Services ( NFS-File shares)

  • Read-write-Many presistent voluems via CSI-CNS and vSAN 7

  • vSAN memory performance metric now displayed

  • Shared disks with multi-wirter flag no longer need to be Easy Zero thick on vsan 7.

  • Support for larger 1PB logical capcity when deduplication and compression enabled

  • Objects immediately repaired when witness Appliance replaced

  • NVMe hot-plug support


vSAN 7.0U1 : Released on October 2020 (Continuous Improvement and Features)


  • vSAN File Services now supports the SMB protocol

  • vSAN File Services now supports kerberos and active directory

  • vSAN File Services Scale Increase from 8 to 32

  • HCI Mesh introduced for mounting remote vSAN datastore

  • A new compression only Data service

  • vSAN Shared Witness Appliance

  • vSAN Data Persistence Platfrom for cloud native applications in vSphere with Tanzu

  • Increased usable capacity with new capacity management features


vSAN 7.0 U2 : Released on March 2021 (Advancements for Modern Applications)


  • HCI Mesh now allows remote mounting of vSAN datastore from non-vsan clusters

  • HCI Mesh vSAN Clusters now support up to 128 remote host mounts

  • vSAN Stretched Cluster now supports 20+20+1 configurations

  • vSAN Stretched Cluster has deeper intergrations with DRS for object sync and fail-back

  • vSAN File Services now supported on vSAN stretched cluster and 2 node vsan

  • vSAN File Serivces Scale increase from 32 to 100 shares

  • vSAN now supports vSphere Proactive HA

  • vSAN supports the new vSphere Native Key Provider

  • vSAN over RDMA

  • Skyline Health Check History



  • Stretched Cluster site/witness failure resiliency

  • Nested Fault domain for two node deployments

  • vSAN File Services Access Based Enumeration

  • vSAN cluster shutdown and restart

  • Enhanced network monitoring and anomaly detection

  • vSAN Health check correlation

  • VM I/O trip analyzer

  • Stretched Cluster support for vanilla Kubernetes

  • vSAN Data Persistence Platfrom now supports asynchronous installations and upgrades

  • CNS platfrom has improved performance ,scales , and resiliency


vSAN 8.0 : Release on November 2022 ( A New Architecture ESA)


  • Launched of the vSAN Express Storage Architecture , and introducing Original Storage

  • Architecture naming convention for traditional vSAN

  • vSAN ESA introduces a new log structured filed system (LFS) and new log structured

  • Object Manager (LSOM) fast data ingestion and efficient metadata storage

  • vSAN ESA Adaptive RAID-5 mechanism

  • vSAN ESA leverages a single tier of NVME-based TLC (Triple level cell) flash devices, removing the construct of disk groups and introducing the construct of storage pools.

  • vSAN OSA support a much larger write buffer of 1.6TB.



  • vSAN ESA introduces support for HCI Mesh

  • vSAN OSA introduces support for HCI Mesh with a stretched Cluster.

  • vSAN ESA introduces support for Delta components for improved durability and resilience

  • A new dynamic default storage policy is introduced for the ESA

  • vSAN ESA introduces enhancements for streaming writes

  • PowerCLI support for vSAN ESA

  • Enhancements to the overall vSAN management experience including higher resolution monitoring, network diagnostic enhancements and skyline health remedation

  • VM I/O trip analyzer tasks may now be scheduled



  • Enhanced topologies for disaggregation with vSAN Express Storage Architecture bring feature parity for vSAN OSA and vSAN ESA.

  • vSAN ESA support for stretched clusters in disaggregated topology

  • Support of disaggregation across clusters using multiple vCenter Servers

  • vSAN ESA Adaptive Write path for disaggregated storage

  • Integrated File Services for Cloud Native and traditional workloads

  • Adaptive Write Path optimizations in vSAN ESA

  • Increased number of VM's per host in vSAN ESA clusters (up to 500/host)

  • New ReadyNode profile and support for read-intensive devices for vSAN ESA

  • vSAN ESA support for encryption deep rekey

  • vSAN ESA prescriptive disk claim

  • Capacity reporting enhancements.

  • Auto-Policy management improvements in vSAN ESA

  • Skyline Health remediation enhancements.

  • Key expiration for clusters with data-at-rest encryption.

  • I/O top contributors enhancements

  • I/O Trip Analyzer supported on two node clusters and stretched clusters

  • Easier configuration for two node clusters and stretched clusters

  • CSI snapshot support for TKG service

  • Data mobility of Cloud Native persistent volumes across datastores


VMware vSAN has come a long way since its inception, evolving with each release to meet the dynamic demands of modern data centers. From pioneering features like all-flash architecture to continuous improvements in performance, scalability, and hybrid cloud integration, vSAN remains at the forefront of software-defined storage solutions. As we anticipate future releases, the journey of vSAN continues to shape the landscape of virtualization, providing organizations with robust and innovative storage solutions.


Note: For the latest updates and features, always refer to VMware's official documentation and release notes.

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