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NEWS.md

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OpenFAM Release Notes

This file contains user visible OpenFAM changes

v2.0.1

  • Fam Option "runtime" was not being fetched from config file. It was using the default value of PMIX.
  • Third party scripts has been modified to use NVMM v0.1. Previously it was using NVMM master branch.

v2.0.0

  • Scalability improvements: This version supports a larger pool of memory by
    allowing multiple memory servers to be used.

  • A memory node contains three new services:

    • The client interface service
    • metadata management service and
    • memory management service.

  • OpenFAM environment uses four seperate configuration files - three for the
    memory and metadata services and one for OpenFAM client. These are:

    • fam_client_interface_config.yaml
    • fam_memoryserver_config.yaml
    • fam_metadata_config.yaml
    • fam_pe_config.yaml

    All the services and the PE read the respective configuration file from
    "config" directory placed at the path mentioned by OPENFAM_ROOT environment
    variable or /opt/OpenFAM.

  • Performance improvements: Memory management and metadata operations have
    been optimized.

  • Background worker threads (unused in v0.4.0) were disabled from the
    memory service.

  • Allocation performance was improved by moving the memset operation to zero
    allocated memory from fam_allocate() to fam_deallocate() path.

  • Regions can span multiple memory servers, thus reducing network bottlenecks
    when multiple data items within the same region are used.

  • fam_size has been replaced with fam_stat.

  • fam_copy has been changed to allow data copies between regions, as well as
    within a region.

  • The return type was changed from int to void for the following APIs:
    fam_initialize, fam_resize_region, fam_change_permissions, fam_put_blocking,
    fam_get_blocking, fam_gather_blocking, fam_scatter_blocking.

  • fam_barrier_all has been added as a supported API.

  • Exception and error handling was simplified. All OpenFAM APIs returns only one
    exception type on error, i.e, Fam_Exception.

v0.4.0

  • Added third-party build scripts for centos 7.8.
  • Fixed unregister of data item on destroy region.
  • Fixed hangs seen with multi-threaded tests on data path blocking operations
  • Fixed OpenFAM build failure with latest googletest.