IOWarp Core 2.3.0

IOWarp Core 2.3.0 is a minor release: the device-paged GPU vector, a round of HDF5 adapter correctness and performance fixes, Windows memory and IPC fixes, storage-engine correctness under full tiers and crashes, a dashboard served by the runtime itself, and a large bug-triage sweep.

85 merged pull requests and 1612 commits since v2.2.1 (2026-08-18 → 2026-10-08).

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Highlights

GPU

• Device-paged gpu_vector and the runtime bugs it exposed (#959)
• GPU runtime starts and links on Intel GPUs: 104 → 254 passing tests on Aurora (#1085)
• Dead-client SHM reaper and partition rejoin (#1212); GpuVmm primary-context release fixed (#1218)

HDF5 adapters

• VFD/VOL exit-time hangs and two VOL data-correctness bugs fixed, found with the netCDF-C suite (#1025)
• VFD reads served from the CLIO cache tier (#1051); four performance fixes (#1092)
• VFD ported to Windows (#1034); connector on-ramp (#1098)

Windows

• Untouched shared memory no longer charged against the commit limit (#1063)
• libzmq AF_UNIX signaler fallback patched (#1068); unmap with the right deallocator (#1070); MSVC O_ACCMODE (#1073)

Storage correctness

• CTE WAL-replay deadlock resolved (#982)
• A full tier evicts to make room (#1010); configured tier score decides placement over a bandwidth guess (#1052)
• Client-side data sieving (#1009); per-device growth unit (#1228)
• Safe-profile recovery and crash consistency battle-tested: 7 fixes across 5 fault scenarios (#1198)

Runtime

• The dashboard is served by the runtime itself (#993, #1006)
• ctp::RwLock reader/writer exclusion fixed (#1032); AggregateOut merges OUT fields only (#1027)
• Cross-node collective bug fixed, with 3.1x lower latency (#1046)
• Dead clients' SHM reaped while running (#1211)

Bug triage

• Fixes across #363–#1210 (#1102, #1168, #1200, #1236)

CI reliability

• A red check now means a real code problem (#1014); #1023, #1045, #1047, #1091, #1135

New

• CLIO-S3 benchmark (#1093)
• The summarizing LLM split into its own summarizer module (#1026)
• ctp::Snappy improvements (#1215)

Known issues

• No pip wheels for 2.3.0. The wheels built from this tag lacked the indexer module that the default config composes, so clio_run start failed; they were not published to PyPI. Use conda, the .deb/.rpm/AppImage or the Windows installer, or install 2.3.1 from pip, which has the fix (v2.3.1).
• test_gpu_vmm_cte is still off by default (CLIO_CORE_ENABLE_GPU_VMM_CTE_TEST=OFF) although #1216 is fixed.
• Open bugs found while writing the new website's examples: #1241–#1251.

Full changelog: v2.2.1...v2.3.0