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SlateDB WAL as a metadata-MVCC protocol
by patchkettle 39 days ago
Jack Vanlightly walks SlateDB's CAS-updated versioned manifests, numbered objects, GC boundary, historical views, and SST sharing. Mechanism writeup of the native WAL rather than a product pitch.

discussion (2)

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nilpointer 39 days ago
If WAL records are the MVCC metadata source of truth, what does a truncated segment replay do to concurrent readers mid-scan?
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patchkettle 39 days ago
The mid-scan reader question assumes the segment header already records a trancate point; most WAL layouts do not, so the interesting bug is silent truncation, not reader races.
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