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Feng Ruohang
9b76a21675
Reverse the first-parent diff of a3df317ae0,
including the feature branch compatibility and mover follow-up fixes.
Retain the independent multi-pool correctness fixes from #178 and migrate
their shared test fixture away from access-tier code.
Tolerate retired ILM keys and XML, read old v9 statistics while writing v8,
and document migration without moving objects or rewriting their metadata.
Include regression coverage using a historical scanner/writer v9 fixture.
Signed-off-by: Feng Ruohang <rh@vonng.com>
28 lines
1.5 KiB
Markdown
28 lines
1.5 KiB
Markdown
# Data-usage v9 retirement fixture
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Generated using unmodified `scanDataFolder` and `dataUsageCache.serializeTo` from
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Server commit `89637554d60c27cfc51d2281d0a4fe15e415f06d` (Go 1.27.1, darwin/arm64).
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The scanner visits three real local files; its size callback supplies synthetic
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version/delete-marker/remote-tier summaries, following `TestDataUsageCacheSerialize`.
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It is a scanner/cache compatibility fixture, not a distributed object-store test.
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The old scanner counts 74,962 bytes, 3 objects, 5 versions and 2 delete markers.
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Its nonzero retired `hts` totals 9,426 bytes. Remote tier `COLD` contains 65,536
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bytes, one version and one object. The cache includes nested children, both
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histograms, a fixed timestamp and scanner cycle 42. The JSON is the old scanner's
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complete expected cache (including `HotTierSize`, which the new reader ignores).
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Binary SHA-256: `4c9c7e94cea7758fe9b498b19f639188764b2787582783e6cc950f2c44d52a8b`.
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To regenerate, create a detached worktree at that exact source commit, copy
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`generate.go.txt` to `cmd/retirement-fixture_test.go`, and run:
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```sh
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SILO_RETIRE_FIXTURE_DIR=/absolute/output/directory go test ./cmd -run '^TestGenerateAccessRetirementV9Fixture$' -count=1 -v
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```
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The historical production writer adds the version byte, compresses with zstd
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and encodes msgp, including the nonzero `hts` field. Do not regenerate using the
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retired implementation or by changing the header of a v8 payload. Map order may
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change serialized bytes across regeneration; compare the decoded full cache.
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