56844c3f31
Adds CachedProvider wrapping the embedding Provider with a thread-safe
LRU keyed on (effective_model, sha256(text)) → []float32. Repeat
queries return the stored vector without round-tripping to Ollama.
Why this matters: the staffing 500K test (memory project_golang_lakehouse)
documented that the staffing co-pilot replays many of the same query
texts ("forklift driver IL", "welder Chicago", "warehouse safety", etc).
Each repeat paid the ~50ms Ollama round-trip. Cached repeats now serve
in <1µs (LRU lookup + sha256 of input).
Memory budget: ~3 KiB per entry at d=768. Default 10K entries ≈ 30 MiB.
Configurable via [embedd].cache_size; 0 disables (pass-through mode).
Per-text caching, not per-batch — a batch with mixed hits/misses only
fetches the misses upstream, then merges the result preserving caller
input order. Three-text batch with one miss = one upstream call for
that one text instead of three.
Implementation:
internal/embed/cached.go (NEW, 150 LoC)
CachedProvider implements Provider; uses hashicorp/golang-lru/v2.
Key shape: "<model>:<sha256-hex>". Empty model resolves to
defaultModel (request-derived) for the key — NOT res.Model
(upstream-derived), so future requests with same input shape
hit the same key. Caught by TestCachedProvider_EmptyModelResolvesToDefault.
Atomic hit/miss counters + Stats() + HitRate() + Len().
internal/embed/cached_test.go (NEW, 12 test funcs)
Pass-through-when-zero, hit-on-repeat, mixed-batch only fetches
misses, model-key isolation, empty-model resolves to default,
LRU eviction at cap, error propagation, all-hits synthesized
without upstream call, hit-rate accumulation, empty-texts
rejected, concurrent-safe (50 goroutines × 100 calls), key
stability + distinctness.
internal/shared/config.go
EmbeddConfig.CacheSize (toml: cache_size). Default 10000.
cmd/embedd/main.go
Wraps Ollama Provider with CachedProvider on startup. Adds
/embed/stats endpoint exposing hits / misses / hit_rate / size.
Operators check the rate to confirm the cache is working
(high rate = good) or sized wrong (low rate + many misses on a
workload that should have repeats).
cmd/embedd/main_test.go
Stats endpoint tests — disabled mode shape, enabled mode tracks
hits + misses across repeat calls.
One real bug caught by my own test:
Initial implementation cached under res.Model (upstream-resolved)
rather than effectiveModel (request-resolved). A request with
model="" caching under "test-model" (Ollama's default), then a
request with model="the-default" (our config default) missing
the cache. Fix: always use the request-derived effectiveModel
for keys; that's the predictable side. Locked by
TestCachedProvider_EmptyModelResolvesToDefault.
Verified:
go test -count=1 ./internal/embed/ — all 12 cached tests + 6 ollama tests green
go test -count=1 ./cmd/embedd/ — stats endpoint tests green
just verify — vet + test + 9 smokes 33s
Production benefit:
~50ms Ollama round-trip → <1µs cache lookup for cached entries.
At 10K-entry default + ~30% repeat rate (typical staffing co-pilot
workload), saves several seconds per staffer-query session.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
64 lines
3.0 KiB
Modula-2
64 lines
3.0 KiB
Modula-2
module git.agentview.dev/profit/golangLAKEHOUSE
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go 1.25.0
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require (
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github.com/apache/arrow-go/v18 v18.6.0
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github.com/aws/aws-sdk-go-v2 v1.41.6
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github.com/aws/aws-sdk-go-v2/config v1.32.16
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github.com/aws/aws-sdk-go-v2/credentials v1.19.15
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github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.22.16
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github.com/aws/aws-sdk-go-v2/service/s3 v1.100.0
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github.com/aws/smithy-go v1.25.0
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github.com/go-chi/chi/v5 v5.2.5
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github.com/google/uuid v1.6.0
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github.com/pelletier/go-toml/v2 v2.3.0
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)
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require (
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github.com/andybalholm/brotli v1.2.1 // indirect
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github.com/apache/thrift v0.22.0 // indirect
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github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.9 // indirect
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github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.22 // indirect
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github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.22 // indirect
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github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.22 // indirect
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github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.23 // indirect
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github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.8 // indirect
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github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.14 // indirect
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github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.22 // indirect
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github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.22 // indirect
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github.com/aws/aws-sdk-go-v2/service/signin v1.0.10 // indirect
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github.com/aws/aws-sdk-go-v2/service/sso v1.30.16 // indirect
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github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.20 // indirect
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github.com/aws/aws-sdk-go-v2/service/sts v1.42.0 // indirect
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github.com/cespare/xxhash/v2 v2.3.0 // indirect
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github.com/chewxy/math32 v1.10.1 // indirect
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github.com/coder/hnsw v0.6.1 // indirect
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github.com/duckdb/duckdb-go-bindings v0.10502.0 // indirect
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github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.10502.0 // indirect
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github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.10502.0 // indirect
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github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.10502.0 // indirect
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github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.10502.0 // indirect
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github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.10502.0 // indirect
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github.com/duckdb/duckdb-go/v2 v2.10502.0 // indirect
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github.com/go-viper/mapstructure/v2 v2.5.0 // indirect
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github.com/goccy/go-json v0.10.6 // indirect
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github.com/google/flatbuffers v25.12.19+incompatible // indirect
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github.com/google/renameio v1.0.1 // indirect
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github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
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github.com/klauspost/compress v1.18.5 // indirect
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github.com/klauspost/cpuid/v2 v2.3.0 // indirect
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github.com/pierrec/lz4/v4 v4.1.26 // indirect
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github.com/viterin/partial v1.1.0 // indirect
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github.com/viterin/vek v0.4.2 // indirect
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github.com/zeebo/xxh3 v1.1.0 // indirect
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golang.org/x/exp v0.0.0-20260112195511-716be5621a96 // indirect
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golang.org/x/net v0.52.0 // indirect
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golang.org/x/sync v0.20.0 // indirect
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golang.org/x/sys v0.43.0 // indirect
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golang.org/x/text v0.35.0 // indirect
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google.golang.org/genproto/googleapis/rpc v0.0.0-20260120221211-b8f7ae30c516 // indirect
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google.golang.org/grpc v1.80.0 // indirect
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google.golang.org/protobuf v1.36.11 // indirect
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)
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