Please find below the DAOS community newsletter for July 2022.
A copy of this newsletter is available on the
- ISC’22 IXPUG (June 2nd at 9am CEST)
DAOS Features for Next Generation Platforms
Mohamad Chaarawi (Intel)
- ESSA’22: 3rd Workshop on Extreme-Scale Storage and Analysis (June
DAOS: Nextgen Storage Stack for HPC and AI
Johann Lombardi (Intel)
- EMOSS’22: Emerging Open Storage Systems and Solutions for Data Intensive Computing (July 1st)
One big happy family: sharing the S3 layer between Ceph, CORTX, and DAOS
Zuhair AlSader (Seagate)
Andriy Tkachuk (Seagate)
- Flash Memory Summit’22: 3rd Workshop on Extreme-Scale Storage and Analysis (August
Requirements and Challenges Associated with the World's Fastest Storage Platform
Jeff Olivier (Intel)
- Current stable release is 2.0.2. See https://docs.daos.io/v2.0/ and https://packages.daos.io/v2.0/ for
- release/2.0 is the release branch for the stable 2.0 release. Latest bug fix release is 2.0.2. 2.0.3 rc3 was tagged and rc4 is imminent.
- release/2.2 is the development branch for the future 2.2 release. Latest test build is 2.1.103.
- 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
- Fix a few client-side compilation issues on ARM64
- Fix a segfault in bio with large single-value update
- Fix several event-related issues causing client-side assertion during soak testing.
- Several documentation improvements/clarifications
- Major recent changes on release/2.2 (future
- All patches listed in the 2.0 section above.
- Fix semaphore leak on pool addition failure
- Add support for ucx+all alias
- Limit UCX scanning to ib and tcp components.
- Fix a few issues in incast variables
- Build UCX in scons when building from source
- Remove NVMe space reservation
- Move dmg to new daos-admin RPM package
- Fix bug in available NVMe space calculation used to support pool create with percentage-based space
- Add support for EC conditional fetch (only used for metadata on EC)
- Remove 1.2 compatibility code in daos_cont_create(). Container UUID cannot be provided by caller any longer.
- Fix daos_event_abort_corruption issue
- Check thread ID in interception descriptor
- Remove dfuse user-space readahead entirely (readahead still done by the kernel)
- Major recent changes on master (future
- All patches listed in the 2.2 section above.
- Several clean-ups to prepare for EC parity rotation feature
- Add SVM (shared virtual memory) support for QAT compression
- Remove CentOS7 stage from CI pipeline
- Update ubuntu to 22.04 in GitHub Action
- User correct uid/git bits when creating files
- Several build infrastructure (scons) improvements
- Add EL9 docker file
- Several server-side build fixes for ARM64
- Limit DTX batched commit count.
- What is coming:
- 2.0.3 rc4 validation
- 2.2.0 code freeze
- 2.4.0 feature freeze
- Major features under development:
- Checksum scrubber
- PR #9345 created out of the feature branch to land to master.
- Soak and performance tests were run against the PR.
- Exit criteria under view, merge to master is imminent.
- Target release: 2.4
- Multi-user dfuse
- More aggressive caching in dfuse for AI APPs
- I/O steaming function interception
- Add the ability to intercept fopen/fclose/fread/fwrite and other streaming functions in the interception library.
- Intercept missing ftello64 function.
- Fix several bug discovered by daos_build test (i.e. building DAOS source code over FUSE/IL).
- Test plan created.
- PR: https://github.com/daos-stack/daos/pull/6939
- Target release: 2.4
- Catastrophic recovery
- Aka distributed fsck or checker
- ddb (low level debugger utility similar to debugfs for ext4) landed
- Most of passes 2 and 3 implemented.
- Testing for ddb and pass 1 in progress.
- Target release: 2.6
- Multi-homed network support
- Aka multi-provider support
- This feature aims at supporting multiple network provider in the engine
- Incorporate new CART API to support bulk transfer from a second provider.
- RPC dispatch to a second provider not supported yet.
- Target release: 2.6
- Client-side metrics
- Performance domain
- Extend placement algorithm to be aware of fabric topology
- Fix to avoid putting shards on the same domain landed
- Target release: 2.8
- LDMS plugin to export DAOS metrics
- DAOS Pipeline API for active storage
- Leveraging the Intel Data Streaming Accelerator (DSA) to accelerate DAOS
- Prototype leveraging DSA for VOS aggregation delivered
- Initial results shared at IXPUG conference.
- OPX provider support in collaboration with Cornelis Networks
- OPX provider merged upstream in libfabric
- PR to add OPX support to mercury merged
- Changes to DAOS to enable OPX as part of the build in progress
- GPU data path optimizations
- I/O Middleware / Framework Support
- TensorFlow-IO plugin for DAOS
- S3 support via a DAOS backend to Rados Gateway (RGW)
- Block interface over DAOS using SPDK DAOS bdev
- DAOS/DFS integration with NFS Ganesha
- Still under exploration
- Challenges with NFS handle and libdfs that has no persistent inode.
- Thanks to Kevin Zhao for providing access to an ARM64 node that will be added soon as a self-hosted runner in GitHub action. This will allow the community to build & test
DAOS on ARM64 on a regular basis.
- A proposal for a DAOS community BoF at SC’22 has been submitted.
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris,
92196 Meudon Cedex, France
Registration Number: 302 456 199 R.C.S. NANTERRE
Capital: 5 208 026.16 Euros
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