docs: propose workspace catalog and CRDT sharding design - #115
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Limit details: You’ve used all 2 included reviews currently available. Your 55 included PR review attempts over the past 7 days set your current allowance at 2 reviews per hour. 📝 WalkthroughWalkthroughThe PR adds a proposed workspace catalog and CRDT sharding specification. It defines shard ownership, authorization-aware routing, transactional catalog events, persistence and recovery, migration, measurements, and verification requirements. The specifications index links to the new document and updates the e2e-testing description. ChangesWorkspace sharding design
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This change adds and indexes a proposed workspace-sharding design without changing product runtime behavior. No actionable merge-blocking risk remains beyond normal checks and review. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 5
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Inline comments:
In `@docs/specifications/workspace-sharding.md`:
- Around line 104-108: Update the workspace sharding specification’s catalog
invalidation flow so the outbox event is not publishable until the Document move
or delete shard transition has durably completed and is retry-safe. Define a
durable operation state or equivalent publishable marker, persist it with the
transition, and have restart recovery/outbox consumption release the event only
after that completion condition is met; apply the same rule to the corresponding
flow at the other referenced section.
- Around line 20-24: Define the legacy Y.Doc migration in the workspace-sharding
specification, including deterministic mapping of mixed Documents, Collections,
records, snapshots, IDs, embedded-view references, and recovery data into
Document and Collection shards. Specify that the split is idempotent and that
the legacy recovery unit remains retained until every target shard is durable,
then add tests covering these guarantees.
- Around line 40-43: Clarify the Deployment instance definition and process
ownership in the specification: state that multiple application processes
sharing the same server-owned identity and persistence target—including the
outbox, event backplane, and shard ownership—belong to one Deployment instance,
and define their coordination rules. Add tests covering scale-out coordination
and isolation between distinct Deployment instances.
- Around line 117-126: Update the SSE resume semantics around the
catalog-changed event to define a cursor scoped to the authorized stream rather
than exposing raw workspace revision or event IDs. Specify its mapping to
workspace revisions and require a resync when filtered-event coverage is
ambiguous, including gaps caused by inaccessible Space changes.
- Around line 65-66: Define Workspace-wide record ID uniqueness in createRecord,
validating caller-supplied IDs against all shards before inserting into the
shard-local records map; reject duplicates while preserving stable global
identity semantics. Update hold coordination to rely on this invariant, and add
a test creating records with the same ID across two shards in one Workspace that
verifies the duplicate is rejected.
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Actionable comments posted: 4
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Inline comments:
In `@docs/specifications/workspace-sharding.md`:
- Around line 141-147: Update the workspace-sharding specification to define
routing-read behavior for catalog rows with pending_content: keep pending
catalog changes out of page-load and catalog API results until the operation
becomes publishable, either by hiding them or explicitly returning the
documented pending response, while preserving the previous state where required.
Ensure crash recovery cannot expose locators, hierarchy, or reserved records
whose content transition has not completed.
- Around line 145-147: Update the workspace outbox delivery rules so each
Workspace resolves revisions in order, or tracks a contiguous covered revision
prefix and emits catalog-resync whenever a gap precedes a publishable revision;
prevent later revisions from advancing the server cursor past an unresolved
earlier revision.
- Around line 175-178: Update the SSE authorization and event-filtering behavior
so a document move out of an authorized Space emits a scoped invalidation or
resynchronization that removes the old catalog entry without exposing the
destination Space or other inaccessible metadata. Preserve redaction for
unauthorized details, and define verification for move-out, move-in, and
permission-change scenarios.
- Line 261: Update the seeded-workspace wording in the measurement specification
to say “a workspace seeded with representative data,” making clear that the
fixture is a workspace populated with representative data while preserving the
existing rerun and concurrency requirements.
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Summary
Adds the proposed architecture specification for #112 and links it from the canonical specifications index.
The proposal separates:
Decision status
The completed #31 benchmark now provides the global-workspace baseline: the daily envelope is acceptable, while the large profile validates document/Collection sharding as the next direction. This PR remains a proposed design until its migration, outbox, SSE resume, identity, and deployment-ownership contracts are reviewed. #113 must implement and measure real shard-aware routing; #114 owns the migration/isolation proof.
Verification
Related to #112.
Summary by CodeRabbit