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- Feature: Hub dashboard now shows a Resources tile with disk and memory usage against configured limits
- Feature: Hub module listing now shows state-change timestamps and duration for each instance
- Improvement: Hub provisioning rejects new instances when disk or memory usage exceeds configurable thresholds; limits are disabled by default (0 = no limit)
- `--hub-provision-disk-limit-bytes` - Reject provisioning when used disk exceeds this many bytes
- `--hub-provision-disk-limit-percent` - Reject provisioning when used disk exceeds this percentage of total disk
- `--hub-provision-memory-limit-bytes` - Reject provisioning when used memory exceeds this many bytes
- `--hub-provision-memory-limit-percent` - Reject provisioning when used memory exceeds this percentage of total RAM
- Improvement: Hub process metrics are now tracked atomically per active instance slot, eliminating per-query process handle lookups
- Improvement: Hub, Build Store, and Workspaces service stats sections in the dashboard are now collapsible
- Bugfix: Hub watchdog loop did not check `m_ShutdownFlag`, causing it to spin indefinitely on shutdown
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- Feature: Added Workspaces dashboard page with HTTP request stats and per-workspace metrics
- Feature: Added Build Storage dashboard page with service-specific HTTP request stats
- Improvement: Front page now shows Hub and Object Store activity tiles; HTTP panel is fixed above the tiles grid
- Improvement: HTTP stats tiles now include 5m/15m rates and p999/max latency across all service pages
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- Feature: Hub watchdog automatically deprovisions inactive provisioned and hibernated instances
- Feature: Added `stats/activity_counters` endpoint to measure server activity
- Feature: Added configuration options for hub watchdog
- `--hub-watchdog-provisioned-inactivity-timeout-seconds` Inactivity timeout before a provisioned instance is deprovisioned
- `--hub-watchdog-hibernated-inactivity-timeout-seconds` Inactivity timeout before a hibernated instance is deprovisioned
- `--hub-watchdog-inactivity-check-margin-seconds` Margin before timeout at which an activity check is issued
- `--hub-watchdog-cycle-interval-ms` Watchdog poll interval in milliseconds
- `--hub-watchdog-cycle-processing-budget-ms` Maximum time budget per watchdog cycle in milliseconds
- `--hub-watchdog-instance-check-throttle-ms` Minimum delay between checks on a single instance
- `--hub-watchdog-activity-check-connect-timeout-ms` Connect timeout for activity check requests
- `--hub-watchdog-activity-check-request-timeout-ms` Request timeout for activity check requests
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- Improvement: Hub provision, deprovision, hibernate, and wake operations are now async. HTTP requests returns 202 Accepted while the operation completes in the background
- Improvement: Hub returns 202 Accepted (instead of 409 Conflict) when the same async operation is already in progress for a module
- Improvement: Hub returns 200 OK when a requested state transition is already satisfied
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* refactor hub callbacks
* improve http responses
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- Improvement: Hub dashboard module list improved
- Animated state dots, with flashing transitions for hibernating, waking, provisioning, and deprovisioning
- Per-row port used by the provisioned instance
- Per-row hibernate, wake, and deprovision actions with confirmation for destructive operations
- Per-row button to open the instance dashboard in a new window
- Multi-select with bulk hibernate/wake/deprovision and select-all
- Pagination at 50 lines per page
- Inline fold-out panel per row with human-readable process metrics
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- Feature: Added `zen hub` command for managing a hub server and its provisioned module instances:
- `zen hub up` - Start a hub server (equivalent to `zen up` in hub mode)
- `zen hub down` - Shut down a hub server
- `zen hub provision <moduleid>` - Provision a storage server instance for a module
- `zen hub deprovision <moduleid>` - Deprovision a storage server instance
- `zen hub hibernate <moduleid>` - Hibernate a provisioned instance (shut down, data preserved)
- `zen hub wake <moduleid>` - Wake a hibernated instance
- `zen hub status [moduleid]` - Show state of all instances or a specific module
- Feature: Added new hub HTTP endpoints for instance lifecycle management:
- `POST /hub/modules/{moduleid}/hibernate` - Hibernate the instance for the given module
- `POST /hub/modules/{moduleid}/wake` - Wake a hibernated instance for the given module
- Improvement: `zen up` refactored to use shared `StartupZenServer`/`ShutdownZenServer` helpers (also used by `zen hub up`/`zen hub down`)
- Bugfix: Fixed shutdown event not being cleared after the server process exits in `ZenServerInstance::Shutdown()`, which could cause stale state on reuse
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- Improvement: Hub module listing now includes per-instance process metrics (memory, CPU time, working set, pagefile usage)
- Improvement: Hub now monitors provisioned instance health in the background and refreshes process metrics periodically
- Improvement: Hub no longer exposes raw `StorageServerInstance` pointers to callers; instance state is returned as value snapshots (`Hub::InstanceInfo`)
- Improvement: Hub instance access is now guarded by RAII per-instance locks (`SharedLockedPtr`/`ExclusiveLockedPtr`), preventing concurrent modifications during provisioning and deprovisioning
- Improvement: Hub instance lifecycle is now tracked as a `HubInstanceState` enum covering transitional states (Provisioning, Deprovisioning, Hibernating, Waking); exposed as a string in the HTTP API and dashboard
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- Feature: Basic consul integration for zenserver hub mode, restricted to host local consul agent and register/deregister of services
- Feature: Added new options to zenserver hub mode
- `consul-endpoint` - Consul endpoint URL for service registration (empty = disabled)
- `hub-base-port-number` - Base port number for provisioned instances
- `hub-instance-limit` - Maximum number of provisioned instances for this hub
- `hub-use-job-object` - Enable the use of a Windows Job Object for child process management (Windows only)
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