DAOS Community Update / May'22

Lombardi, Johann

Hi there,


Please find below the DAOS community newsletter for May 2022.


Past Events

  • 2022 Energy HPC Conference (March 3rd)

DAOS Use at Argonne

Kevin Harms (Argonne)

Johann Lombardi (Intel)

Mohamad Chaarawi (Intel)


  • Salishan Conference On High Speed Computing (April 26th)

Accelerating Data-driven Workflows with DAOS

Johann Lombardi (Intel)


Upcoming Events

  • ECP BoF (May 11th at 11am Eastern time)

DAOS Next Generation Storage

https://www.exascaleproject.org/event/ecp-community-bof-days-2022/ (registration is open)

Kevin Harms (ANL)

Mohamad Chaarawi (Intel)

Johann Lombardi (Intel)

  • Intel Vision (May 11th)

Advanced Storage and Memory Hierarchy in AI and HPC with DAOS Storage


Andrey Kudryavtsev (Intel)

  • SODACODE 2022 Keynote (May 25th)

Advanced Storage and Memory Hierarchy in AI and HPC with DAOS Storage

Andrey Kudryavtsev (Intel)

  • SODACODE 2022 Breakout Session (May 26th)

Accelerating AI with DAOS Storage

Johann Lombardi (Intel)

  • ISC’22 BoF (May 30th at 4pm CEST)

Accelerating HPC and AI with DAOS Storage


Kevin Harms (ANL)

Adrian Jackson (EPCC)

Michael Hennecke (Intel)

Mohamad Chaarawi (Intel)

Johann Lombardi (Intel)

  • ISC’22 IXPUG (June 2nd at 1pm CEST)

DAOS Features for Next Generation Platforms


Mohamad Chaarawi (Intel)

  • ISC’22 Intel Booth (May 30th to June 1st)

DAOS demonstration, Fireside chats, …

  • ESSA’22: 3rd Workshop on Extreme-Scale Storage and Analysis (June 3rd)

DAOS: Nextgen Storage Stack for HPC and AI


Johann Lombardi (Intel)



  • Current stable release is 2.0.2. See https://docs.daos.io/v2.0/ and https://packages.daos.io/v2.0/ for more information.
  • Branches:
    • release/2.0 is the release branch for the stable 2.0 release. Latest bug fix release is 2.0.2.
    • release/2.2 is the development branch for the future 2.2 release. Latest test build is 2.1.101.
    • Master is the development branch for the future 2.4 release. Latest test build is 2.3.100.
  • Major recent changes on release/2.0 (bugfix release):
    • Several documentation and test fixes
    • Fix forced pool destroy flow
    • Fix a bug in the rare event of leadership loss in the management service
    • Upgrade to libfabric 1.15-rc3 to fix a tcp provider regression and pick some other upstream fixes
    • Fix a few EC bugs in degraded update and aggregation
    • Fix a libdaos bug with blocking calls in multi-threaded environments. An extra lock on the DAOS event is required.
    • Migrate CI testing to Rocky Linux
  • Major recent changes on release/2.2 (future 2.2 release):
    • All the changes listed above in the release/2.0 section.
    • Load-balance NIC allocations in the agent when the process does not have a local interface usable with DAOS
    • Fix a bug with checksum, hole and EC.
    • Fix a bug in SPDK with VMD causing spdk_vmd_init() to fail in certain conditions
    • Several EC aggregation optimisations
    • Allow ucx+dc_x provider in the config
  • Major recent changes on master (future 2.4 release):
    • All the changes listed above in the release/2.2 section.
    • Introduce local TX to rdb
    • Wrap MPI code in unified interface
    • Allow VOS pool open to ignore UUID
    • Add documentation for pmempool check and repair
    • Improve test coverage
  • What is coming:
    • 2.2.0 testing and code freeze
    • 2.4.0 feature freeze





  • James Nunez joins the Intel DAOS team as a performance/application engineer.
  • DAOS Roadmap has been updated on the wiki.
  • SODACODE 2022 hackathon is still underway. The list of DAOS activities offered in this hackathon has been created in jira:


See https://events.linuxfoundation.org/sodacode/ for more information.

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Registered headquarters: "Les Montalets"- 2, rue de Paris,
92196 Meudon Cedex, France
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