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S3 VFD

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HDF and HDF-EOS Workshop XXI (2018)

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S3 VFD

  1. 1. S3 VFD Elena Pourmal The HDF Group HDF Workshop July 17, 2018 July 17, 2018 HDF Workshop
  2. 2. 2 • Goal - Serve HDF5 files from Object Store • Approach  Use existing HDF5 library and new VFD drivers to access the HDF5 file (work in progress)  S3 VFD uses range gets to read the desired data from the HDF5 file  R/O case • Optimization is performed to avoid small metadata accesses • Ingestion tool is required to create object with metadata information  R/W case takes advantage of paged allocation feature introduced in HDF5 1.10.1 • VFD tracks allocations for the pages containing metadata and raw data for an object. S3 Virtual File Driver
  3. 3. 3 Virtual Object Layer and Virtual File Driver
  4. 4. 4 • New API to set up S3 VFD herr_t H5Pset_fapl_ros3(hid_t fapl_id, H5FD_ros3_fapl_t *fa) • Credentials are passed via the H5FD_ros3_fapl_t structure typedef struct H5FD_ros3_fapl_t { int32_t version; hbool_t authenticate; char aws_region[H5FD__ROS3_MAX_REGION_LEN + 1]; char secret_id[H5FD__ROS3_MAX_SECRET_ID_LEN + 1]; char secret_key[H5FD__ROS3_MAX_SECRET_KEY_LEN + 1]; } H5FD_ros3_fapl_t; Programming Model
  5. 5. 5 • Traversing HDF5 example (C program) • Working with tools (h5dump and h5ls) Demo
  6. 6. Thank You! July 17, 2018 HDF Workshop

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