NVIDIA GPUDirect Storage Release Notes

Release information for NVIDIA® Magnum IO GPUDirect® Storage.

1. Introduction

Release information for NVIDIA® GPUDirect® Storage (GDS) for developers and users.

NVIDIA® Magnum IO GPUDirect® Storage (GDS) is one of the members of the GPUDirect family of technologies. GDS enables a direct data path for direct memory access (DMA) transfers between GPU memory and storage. This direct path increases IO bandwidth, decreases IO latency and reduces the utilization load on the host CPU.

GDS is generally available on third party storage solutions such as DDN EXAScaler®, Dell Isilon, IBM Spectrum Scale, NetApp ONTAP, BeeGFS, WekaFS™, VAST NFS, Dell Isilon, NVmesh Excelero, ScaleFlux, Micron, and Pavilion Data. See the Support Matrix for the complete list. GDS documents and online resources provide additional context for the optimal use of and understanding of GPUDirect Storage.

To learn more about GDS, refer to the following posts:

2. New Features

The following features have been added in v1.4:
  • Hopper PCIe support
  • RHEL 9.0 and Ubuntu 22.04 support

Features introduced in previous releases:

v1.3.1:
  • GDS can be now installed through CUDA .run files.
  • Support for Ubuntu 22.04 and RHEL9.
  • Improvements to NIC to GPU affinity for userspace RDMA file systems.
v1.3
  • Initial support for Linux dmabuf.
v1.2
  • Support for BeeGFS.
  • Support for XFS.
  • Batch APIs available for use (Alpha level support).
v1.1.1:
  • Use nvidia_peermem default for userspace RDMA filesystems (GPFS, Weka). In order to use nvidia_peermem, load it using:
    # modprobe nvidia_peermem
  • Added support for BeeGFS (preview).
v1.1:
  • The XFS file system has been added to the list of supported file systems at a a beta support level.
  • Improved support for unregistered buffers.
  • Added options start_offset and io_size to gdsio config file per job options.
  • Improved performance of 4K and 8K IO sizes for local file systems.
  • Added user-configurable priority for internal cuFile CUDA streams.
v1.0:
  • New configuration and environment variables for the cuFile library.
  • Fixed error handling behavior for Weka retriable and unsupported errors.
  • Removed hard dependency on librcu-bp.
  • Added read support for IBM Spectrum Scale.
v0.95:
  • Compatibility with POSIX IO is enabled by default.

  • Alpha level support for RHEL 8.3.

  • GDS is available as Technical preview for DGX OS.
  • Support for MLNX_OFED 5.3 for NVMe and NVMeOF.

  • Support for Excelero™ NVMesh devices.

  • Support for ScaleFlux computational storage.

  • Integration with DALI and PyTorch.

  • Experimental RAPIDS integration for cuDF, unoptimized, reads only.

3. MLNX_OFED and Filesystem Requirements

The following are the MLNX_OFED and filesystem requirements for GDS:

  • MOFED 5.7-x.x.x.x does not support Ubuntu 22.04 or RHEL9.x.
  • MLNX_OFED 5.3 and later, which supports NVMe NVMeoF, NFSoRDMA (VAST) on Linux kernel 4.15.x and 5.4.x. MLNX_OFED 5.4 is preferred.
    MLNX_OFED must be installed before installing GDS. Refer to Installing GPUDirect Storage for more information about installing MLNX_OFED.
    Note: MOFED 5.5.x has been tested with NVMe, NVMeOF, NFS. For other DFS file systems support, check with the respective vendor.
  • nvidia-fs.ko requires Linux kernels 4.15.x and above.

4. Support Matrix

GDS has been tested on following NVIDIA GPUs:T10x, T4, A10, Quadro P6000, A100, and V100. For a full list of GPUs that GDS works with, refer to the Known Limitations section.

Partner/Distributed File Systems

Partner Comany Partner Product Version Compatible GDS Version Date
NetApp ONTAP 9.10.1 1.0 and higher Jan 2022

NetApp

ThinkParQ

System Fabrics Works

7.3.0 1.1.1 and higher March 2022
IBM Spectrum Scale 5.1.2 and newer 1.1 and higher Nov 2021
DDN

EXAScaler 5.2 and newer

EXAScaler 6.0 and newer

1.1 and higher Nov 2021
VAST Universal Storage 4.1 1.1 and higher Nov 2021
WekaIO WekaFS 3.13 1.0 June 2021
DellEMC PowerScale 9.2.0.0 1.0 Oct 2021
Hitachi Vantara HCSF 1.0 Oct 2021

Local File Systems

GDS supports following local file systems:
  • EXT4
  • XFS

5. GDS Enabled Libraries

GDS has been enabled in the following libraries:

6. Included Packages

The GDS package contains the following Debian packages:

  • gds-tools-11-8_*.deb

  • libcufile-11-8_*.deb

  • libcufile-dev-11-8_*.deb

  • nvidia-fs_2.13.5.deb

  • nvidia-fs-dkms_2.10.*.deb

  • nvidia-gds-11-8_*.deb

  • nvidia-gds_11.8.*.deb

Note: Each component has a README file. For example, for gds-tools, the README file is in the /usr/local/CUDA-11.8/gds/tools/ directory.

7. Known Issues

The following are known issues in this release of GDS.

  • In case of WRITE operations, occasionally DDN Exascaler 6.1 returns an error while flushing the data to the storage, resulting in a failure.
  • With DDN Exascaler 6.1, RHEL 9 is not supported.
  • For best performance of NFSoRDMA on bare metal, please use MLNX-OFED 5.4-x.
  • On RHEL systems, there is no /etc/cufile.json symlink in the .run installer. In order to solve this issue, create a symlink to the default installed configuration file using following command:

    sudo ln -s /usr/local/cuda-11.8/gds/cufile.json /etc/cufile.json
  • Upgrading of Linux Kernel version and nv_peer_mem: WekaFS does not support newer MLNX_OFED versions 5.3.x and above with GDS. nvidia-peer-memory-dkms=1.1-0-nvidia2 is required for GDS support with WekaFS. Please follow the instructions in Installing GDS.
  • For DDN EXAScaler filesystem:

    • With stripe count > 1, cuFileRead and cuFileWrite do not work with poll mode enabled for versions older than 2.12.5_ddn10.
    • With 2.12.5_ddn10, any reads beyond EOF causes a BUG_ON inside nvidia-fs.
  • RHEL8.3 does not have default udev rules for detecting RAID members, which disables GDS on RAID volumes. Refer to the section Adding udev Rules for RAID Volumes in the GPUDirect Storage Installation and Troubleshooting Guide.

  • On DGX OS:

8. Known Limitations

This section provides information about the known limitations in this release of GDS.

Notices

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