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[fence 1/9] libsql-server: document the namespace fence contract - #41
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tszymczyszyn-shopify wants to merge 1 commit into
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tszymczyszyn-shopify wants to merge 1 commit into
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Add docs/NAMESPACE_FENCE.md, the contract and design for a durable, operation-owned namespace fence: source and target state machines and permission matrix, admin API, stable outcome codes and their mapping to HTTP, Hrana, gRPC, the write proxy and replication, metastore schema and CAS semantics, write admission generations and positive drain, read fence, quarantined target lifecycle and the reusable import capability, restart and eviction rules, fail-closed metastore recovery, deployment flag and legacy-binary protection, code-path coverage, test strategy and the acceptance-test map. Co-authored-by: Tomasz Szymczyszyn <tomasz.szymczyszyn@shopify.com>
This was referenced Oct 5, 2026
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Adds
docs/NAMESPACE_FENCE.md, the contract for the operation-owned namespace fence: state model and permission matrix, admin API, durable state, outcome codes and their mapping per protocol, write admission and positive drain, source read fence, target lifecycle, restart and failure semantics, deployment and compatibility, and observability.This is the final version of the document from the source PR, landed first so the design can be reviewed before any code. The code pieces that follow implement it; none of them edits the document.
Review focus
The state model (section 3), the outcome codes (section 6), and the deployment/compatibility rules (section 13). Agreeing on these first makes the rest of the stack a check against the contract.
Commits
Stack
Part 1 of 9, based on
v0.9.30-shopify-patches. Retargeted from #35 with no feature change: applied in order, the 9 PRs carry #35's fence diff (stable patch ID70d97d6a) onv0.9.30-shopify-patches. Review and land bottom-up, restacking after each squash or rebase merge.