Module index Future

Index Module - Future Enhancements

Scope

• hardening and refinement of index runtime behavior across core and accelerated paths
• expansion of deterministic reliability under mixed backend and lifecycle operations
• stronger benchmark-backed guardrails for index hot paths

Design Constraints

• index contracts remain backward compatible within major release line.
• core lookup/mutation behavior remains deterministic under bounded constraints.
• backend degradation paths remain explicit and observable.
• lifecycle operations remain auditable and operationally controllable.

Required Interfaces

Interface	Requirement
core index interfaces	deterministic mutation/search semantics
acceleration interfaces	explicit backend-aware execution with bounded fallback
lifecycle interfaces	stable rebuild/tiering/distribution behavior
optimization interfaces	bounded adaptive/replay-driven tuning behavior

Implementation Notes (v1.4.0)

GPU Vector Index Backend - CUDA (In Progress)

• Implemented CUDA kernels for vector similarity operations:
  • L2 (squared Euclidean) distance computation
  • Cosine distance with normalization
  • Inner product (max-IP search)
• Batch vector search with Thrust library for efficient sorting/reduction
• Device memory management with GPU memory manager
• Stream-based async kernel execution
• FAISS/RAFT integration for advanced search algorithms

GPU Vector Index Backend - HIP (In Progress)

• HIP equivalent kernels for AMD GPU support
• Rocm Thrust for AMD device operations
• hipBLAS for matrix operations (dot product, GEMM)
• HIP stream management and device memory allocation
• Feature-parity with CUDA backend

Broader Hardening (v1.4.0+)

• tighten parity across CPU/GPU/vector backends and fallback pathways.
• standardize diagnostics for rebuild/tiering/distribution incidents.
• expand resilience tests for prolonged retrieval/update workloads.
• broaden benchmark depth for advanced quantization and distributed scenarios.

Test Strategy

• unit and integration suites for vector/secondary/spatial/graph index flows.
• regressions for unsupported backend and lifecycle-degradation scenarios.
• deterministic stress runs for high-concurrency index operations.
• release-profile benchmark runs for mapped index targets.

Performance Targets

• core lookup/mutation and control-plane operations remain inside regression budgets.
• index hot paths remain stable at p95/p99 envelopes.
• mapped benchmark manifests reach no-missing-case status for release gating.

Security / Reliability

• maintain strict validation before index mutation/rebuild operations.
• preserve explicit fallback signaling for backend capability failures.
• enforce bounded lifecycle behavior under degraded runtime conditions.
• keep diagnostics actionable for production index incidents.

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