perf(groups): return updates before large user sync - #827
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Included review availability: Your plan provides up to 8 included reviews per hour; 2 remain after this review. WalkthroughGroup updates avoid loading unchanged relations, return membership counts, and schedule cancellable background synchronization for access changes. Synchronization fetches users in keyset-paginated batches, reuses accessible inbound tags, and awaits node dispatch. ChangesGroup user synchronization
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟠 High · up to Access-affecting group updates now return before all users and nodes are reconciled. Concurrent membership changes or interruption during background processing could leave stale authorization, allocations, or node state for part of the group, so this PR is not merge-ready without addressing or explicitly accepting that consistency risk. Sequence Diagram(s)sequenceDiagram
participant GroupOperation
participant GroupMembershipQueries
participant UserCRUD
participant NodeSync
GroupOperation->>GroupMembershipQueries: Fetch next group user ID batch
GroupMembershipQueries-->>GroupOperation: Return ordered user IDs
GroupOperation->>UserCRUD: Load node-sync user columns
UserCRUD-->>GroupOperation: Return users in input order
GroupOperation->>NodeSync: Sync allocations and dispatch users with tags
NodeSync-->>GroupOperation: Await dispatch completion
Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Inline comments:
In `@app/operation/group.py`:
- Around line 118-123: Make group synchronization safe across multiple
application processes rather than relying only on the process-local
_group_user_sync_tasks cancellation map. Add distributed per-group coordination,
or persist and validate a generation for each update immediately before
allocation commits and node dispatch, so stale _sync_group_users_safely work
cannot commit or dispatch after a newer update.
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app/db/crud/group.pyapp/db/crud/user.pyapp/node/sync.pyapp/node/user.pyapp/operation/__init__.pyapp/operation/group.pytests/test_group_update_sync.py
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Inline comments:
In `@app/operation/group.py`:
- Around line 123-128: In the group operation flow, commit the transaction
immediately after sync_users_allocations updates users.proxy_settings and before
calling sync_users, so node dispatch only uses persisted allocation state. Keep
the existing sync_users arguments and subsequent behavior unchanged.
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app/db/crud/group.pyapp/db/crud/user.pyapp/node/sync.pyapp/node/user.pyapp/operation/__init__.pyapp/operation/group.pytests/test_group_update_sync.py
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Inline comments:
In `@app/db/crud/group.py`:
- Around line 82-85: Update remove_old_inbounds to lock all affected Group rows
before deleting ProxyInbound and inbounds_groups_association records,
coordinating with _sync_group_users while preserving existing cleanup behavior.
Add an interleaving test that verifies sync_users cannot dispatch access for an
inbound removed after final validation.
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app/db/crud/group.pyapp/db/crud/user.pyapp/node/sync.pyapp/node/user.pyapp/operation/__init__.pyapp/operation/group.pytests/test_group_update_sync.py
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Inline comments:
In `@app/db/crud/host.py`:
- Around line 106-115: Update remove_inbounds to acquire the relevant group-row
locks before reading group_ids, using the same lock protocol as group
association updates so concurrent synchronization cannot dispatch an inbound
during deletion. Preserve the existing deletion behavior and add a test covering
the interleaving between association updates and inbound deletion.
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app/db/crud/group.pyapp/db/crud/group_lock.pyapp/db/crud/host.pyapp/db/crud/user.pyapp/node/sync.pyapp/node/user.pyapp/operation/__init__.pyapp/operation/group.pytests/test_group_update_sync.py
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1 participant
Problem
PUT /api/group/{group_id}keeps the dashboard in a loading state for minutes on large groups. A group with roughly 30,000 members currently performs all of the following before returning the response:Group.usersrelationship just to validate and serialize the group response.Userwith admin, next-plan, usage-log, and group relationships.This makes request latency, memory use, and query count scale with group membership. It is separate from, and complementary to, the group-list optimization in #772.
Changes
Group.usersand count memberships directly for the response.id,admin_id,status, andproxy_settingsfor background node synchronization.Behavior and trade-off
The group row is committed before the API returns. For inbound/status changes, propagation to users and nodes becomes eventually consistent and continues in the background. Name-only changes are immediate and require no propagation. Background failures are logged with the group ID.
The task registry keeps strong references to active work and bounds it to one task per group. A newer update cancels the older task; every batch reads current membership and inbound access before reconciling.
Tests
ruff check app tests/test_group_update_sync.py— passedruff format --checkfor all changed files — passedAdded regression coverage for:
Notes
Summary by CodeRabbit
Performance
Bug Fixes