FlashSoft® software is a proven solution for host-based caching for VMware vSphere® environments. Employing a solid-state device in the vSphere server, administrators can eliminate the I/O blender and storage bottlenecks and realize the full potential of their VMware infrastructure.


Deploying Server Flash for VMware allows you to:

  • Migrate tier-one applications to virtual servers with confidence.
  • Increase application performance in virtual machines by 2x-4x or more.1
  • Increase VM density by 3x or more.2
  • Deploy valuable flash resources efficiently for maximum benefit.


The performance benefits of FlashSoft in any specific environment depend on the latency in the current storage infrastructure, the characteristics of the workload and I/O behavior, and other factors including server and network capabilities. To learn more about how FlashSoft can improve application performance in your environment, please consult a SanDisk FlashSoft representative about a free evaluation.

The optimal cache size depends on the amount of data on the disks being accelerated, the applications running on the server, and the peak utilization. Please consult a SanDisk FlashSoft representative to discuss the optimal SSD for your needs.


FlashSoft software makes the best use of solid-state architecture to deliver unparalleled storage performance improvements. Rather than statically partitioning the cache per VM, FlashSoft dynamically allocates cache space among all accelerated VMs, eliminating the inefficiencies of idle SSD space, and the inconvenience of manually reallocating cache resources when migrating VMs.

FlashSoft software works with any standard SSD attached via SATA, SAS, or PCIe. It supports any SAN or DAS storage infrastructure.


  • Supports all VMware features: HA, vMotion®, DRS, Storage vMotion, etc.
  • Works with any data storage infrastructure and requires no change to storage management, backup, or compliance polices.
  • Runs in the host ESXi kernel and does not use agents in the VMs or their operating systems.
  • Supports any guest operating system in the VMs.
  • Easily administered through the VMware vCenter™ console.


Unlike flash deployed in storage, FlashSoft software delivers the benefits of flash performance directly to the servers and workloads that require acceleration, without requiring modifications to data storage systems. As more I/O operations run on the solid-state devices installed in servers, traffic on the storage infrastructure is significantly reduced, increasing the value and the useful lifetime of existing storage investments.

System Requirements

Operating System
VMware vSphere 5.1
(ESXi 5.1)
VMware vSphere 5.5
(ESXi 5.5)
64-bit x86 processor 2 or more cores
Cache Size
Minimum Size: 16GB per host
Maximum Size: 16TB per host
Storage Supported
Any DAS or SAN storage

Case Studies

SanDisk and eDiscovery

Speeding Up the Internet of Things: Crane Merchandising

Plaxo, a Comcast Silicon Valley Innovation Center

Cloud Plus, a Private Cloud Solutions Provider

Middle Tennessee ENT, a Medical Clinic

White Papers

Caching Software Performance Test: Microsoft SQL Server Acceleration with FlashSoft Software 3.8 for Windows Server

EMA Impact Brief: Enhanced FlashSoft Software & Bundles Increase Performance, Lower Storage Costs

Performance Test: FlashSoft® 3.7 for VMware vSphere® 5.5

Data Sheets

Data Sheet: FlashSoft 3.7 for VMware vSphere 5.1 & 5.5

Data Sheet: FlashSoft 3.8 for Windows Server & Windows Server Hyper-V

Data Sheet: FlashSoft 3.8 for Linux

Product Overview: FlashSoft 4.0 for VMware vSphere 6

Analyst Reports

EMA Impact Brief: FlashSoft Software 4.0 Increases Performance, Lowers Storage Costs

VMware and SanDisk Boost Caching with vSphere VAIO API

A Technology Validation by Taneja Group

Total Economic Impact Study by Forrester

Aug 31, 2015 — SanDisk FlashSoft Integrates Data Service for VMware vSphere by Lyle Smith, StorageReview

Aug 31, 2015 — SanDisk Announces FlashSoft 4 Integrated In VMware vSphere by Paul, Alcorn, Tom's IT Pro

Aug 26, 2014 — VMworld 2014 - Storage News Part 1: vSphere APIs for I/O Filters, Storage & Virtualization blog by Cormac Hogan

Aug 26, 2014 — SanDisk VAIO Server-Side Caching on Tech Field Day Extra at VMworld 2014

Jan 30, 2014 — "SanDisk FlashSoft 3.1 vSphere: tests" by Luca Dell'Oca

May 27, 2014 — SanDisk FlashSoft Caching Software Review (Windows) by Brian Beeler, StorageReview

Apr 16, 2014 — Enterprise Storage To Drive SanDisk's First Quarter Performance — Forbes

Jan 27, 2014 — "A closer look at SanDisk FlashSoft 3.1 for vSphere" by Luca Dell'Oca

Five Tips on How to Be Smarter with Your Flash Investment

The Five Myths of Server-Side Caching - Separating Fact From Fiction

Now Available in Bundles!

FlashSoft software is now available in bundles with SanDisk PCIe, SAS, and SATA.


1. Results for performance from TPC-C based OLTP workload tests. System under test: Dell R720. Performance numbers are tmpC scores. Complete test report available. Performance results may vary according to system architecture, configurations and applications.

2. Density results from specvirt_sc2010. System under test: Dell 810. Complete test scores available. Performance results may vary according to system architecture, configurations and applications.

3. 1GB = 1000000000 Bytes. Actual user capacity less.


Whether you’re a Fortune 500 or five person startup, SanDisk has solutions that will help you get the most out of your infrastructure.


Go ahead, ask us some questions and we'll get back to you with answers.

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