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True scale-out distributed Software Defined Storage

End to end NVMe, RDMA, Kernel-Bypass, high throughput and low latency

Designed for high performance flash storage

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High Performance Scale-out SDS
iSCSI / iSER / NVMe-oFKernel-bypass, lock freeThin provisioningDesigned for All FlashZero-Copy Snapshots1-1024 nodes scale-out


  • 3 (+) Nodes Scale-out
  • Two nodes HA
  • Single node with redundancy


  • iSCSI (TCP)
  • iSCSI over RDMA (iSER)
  • NVMe over Fabric (RDMA)
  • RDMA / TCP cross Nodes Replications

Featured Storage Software

  • True Scale-Out SDS Storage
  • Designed for HPC All Flash appliance
  • Compatible with traditional hybrid storage
  • Multiple copies and strong consistency
  • Unlimited Snapshots
  • Zero-Copy Snapshots.
  • RAW and Log Structured Volume
  • Completely Kernel-Bypass
  • Polling Mode, Zero Context Switch
  • Zero System Call in I/O path

Really High Performance

  • High BW, fully utilize 200G network
  • 5,000,000 IOPS per NUMA
  • Extreme low latency (80μs)
  • High Optimized for all flash array
  • Compatible with SATA SSD/HDD

Crazy Fast, reliable with cool features

FlexSDS is 100% Scale-Out SDS storage which designed for ALL Flash and also supports for hybrid storage, can manage all disks and make them as pooled with the ability to create arbitrary, dynamic block volumes that can be utilized by any clients. These volumes are allowed to create unlimited and zero-copy snapshots. Storage Stack provides ways for building data in redundancy and scale-up, performance scaled by adding more devices.  All Volumes can be exposed to clients via iSCSI, iSER and NVMF

The major upgraded HPC Storage FlexSDS 4.x version is now officially released and available for users, click Download Trial to get trial software or more information.

Why Choose FlexSDS

FlexSDS is true scale-out software defined storage software, which is designed as high performance storage stack solution for All-Flash-Storage and compatible with traditional hardware, user can use command line utils to quick review it.

  • True Scale-out Storage

    Allows to create 3-1024 nodes of storage cluster.

  • Highly Optimized

    Enables NVMe sharing that scales performance linearly at near 100% efficiency


    Completely confirm to standard and support for iSCSI, iSER (iSCSI over RDMA) and NVM-oF (NVMe over Fabric)

  • Flexible Scale Up

    Storage Pooled stack allows to create arbitrary, dynamic block volumes in thin provisioning and log structured. Linear scalability in performance and capacity.


    Supports all type block devices like: NVMe, SSD and HDD.

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