FlashSoft® Software for Linux®


FlashSoft® software cost-effectively boosts database and application performance on Linux. FlashSoft enables solid-state storage to function as a cache for frequently accessed data ("hot data") in servers, increasing both application performance and storage efficiency.

Using standard OLTP performance test workloads, FlashSoft software has been shown to increase application performance from 3x to 5x1.



A write-back caching option is available for optimal performance with workloads such as databases and transactional applications. FlashSoft can natively mirror two SSDs to protect against data loss in the event of SSD failure, without the incremental latency or complexity of third-party RAID.

FlashSoft software can also be deployed as a read-only cache for read-intensive workloads such as Web servers, search and discovery, analytics, and streaming media. Cache data and metadata are maintained entirely on the SSD for persistence in the event of a server crash or system failure, and FlashSoft software's unique metadata model allows full recovery of the cache in milliseconds upon system restart.


FlashSoft software runs transparently as a block-level module within the Linux operating system. The administrators direct the FlashSoft software to the SSD that the software will use as a cache, and select which data volumes to accelerate.

FlashSoft then automatically identifies the hot data and accelerates data access for the identified volumes. The FlashSoft software is managed through a set of command-line tools, so administrators can manage its functions and operations directly, starting and stopping data acceleration as needed.


Performance tests2 illustrate FlashSoft software was able to accelerate the workload from 464 IOPS to 7,388 IOPS – nearly a 16x increase in performance compared to the non-accelerated back end. Storage latency was also greatly improved dropping from 1,210 milliseconds to 54.93 milliseconds – a 22x improvement in response time.


FlashSoft software uses flash devices installed in the server to minimize latency and reduce I/O between server and storage. Unlike flash deployed in storage systems, the solid-state cache in the server delivers the benefits of flash performance to the specific servers and workloads that require acceleration, without requiring modifications to storage infrastructure. 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
Red Hat® Enterprise Linux (RHEL) 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 7.0, 7.1, 7.2 (64-bit)
CentOS 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 7.0, 7.1 (64-bit)
Linux KVM on RHEL and CentOS 7.0 and 7.1
SLES 11 SP3, SP4 (64-bit)
SLES 12, SLES 12 SP1
Ubuntu Server 14.04.x LTS with kernel version 3.13.0-24 or higher
SSD Hardware2
FlashSoft software runs on any standard SSD (PCIe, SAS, SATA or NVMe)
Minimum cache size: 16GB
Maximum cache size: 16TB
Server Memory & CPU
Recommended CPU: dual core or greater, 2GHZ or above, 64-bit x86 processor3
Memory utilization: 500MB3
CPU utilization: 3% - 5%3
All server configurations: rack mount, tower, blades or skinless
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. Based on internal testing. As measured using an OLTP benchmark suite on MySQL 5.5. Complete test report available upon request. Performance results may vary according to system architecture, configurations and applications.

2. The optimal cache size depends on the amount of data on the volume being accelerated, the applications running on the server, and the peak utilization.

3. Based on internal testing. Performance results may vary according to system architecture, configurations and applications. Performance results may vary according to system architecture, configurations and applications.


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.

Let's Talk

Don't wait, let's just talk now and start building the perfect flash solution.

Global Contact

Find contact information for offices all over the world.


Whether you'd like to ask a few initial questions or are ready to discuss a SanDisk solution tailored to your organizations's needs, the SanDisk sales team is standing by to help.

We're happy to answer your questions, so please fill out the form below so we can get started. If you need to talk to the sales team immediately, please phone: 800.578.6007


Please indicate your areas of interest:


Questions or comments:


Thank you. We have received your request.