Layer 2 — application architecture · 1,820 documents
| ID | Document | Source |
|---|---|---|
| app_invariants__13dfbe0b71e172a0 | INVARIANT: Hierarchical Metadata Versioning SHADOW: Bucket configuration state (Policy, SSE, Lifecycle) must track independent 'UpdatedAt' timestamps to resolve conflicts during site-wide… | — |
| app_invariants__41d3908197736d13 | INVARIANT: An operation across multiple disks requires a quorum of identical errors to be considered a failure; otherwise, it is treated as a success with some unavailable disks. SHADOW: This law… | — |
| app_invariants__0d261156f4b1618c | INVARIANT: Configuration changes are validated and applied in a transactional sequence: decrypt, parse, merge, validate, and save. A failure at any step aborts the entire process, leaving the… | — |
| app_invariants__66e8f47f09f160d3 | INVARIANT: Low-level, platform-specific I/O errors are deterministically mapped to a canonical, abstract set of storage errors before being propagated to higher-level logic. SHADOW: This abstraction… | — |
| app_invariants__0a8b0d979450706c | INVARIANT: A hash of the input data is always calculated and used to produce a deterministic cryptographic signature, ensuring that identical inputs always yield identical signatures. SHADOW: This… | — |
| app_invariants__0d323f665da74d25 | INVARIANT: A background routine perpetually attempts to acquire and hold a distributed lock, exposing the lock's context through a channel only upon successful acquisition, effectively serializing… | — |
| app_invariants__c5ca24cbee96987f | INVARIANT: Data structures are serialized and deserialized through a strictly defined, field-by-field protocol, where unknown fields are explicitly skipped to maintain forward and backward… | — |
| app_invariants__b1685e991d040791 | INVARIANT: Concurrent updates to shared metric counters are protected by a mutex, ensuring that each increment or decrement operation is isolated and serialized. SHADOW: This prevents race… | — |
| app_invariants__206d210098ec6853 | INVARIANT: Long-running, recursive directory traversal operations periodically check for a context cancellation signal at the entry point of each new directory scan. SHADOW: This provides a… | — |
| app_invariants__03bc0efafceda360 | INVARIANT: Aligned Buffer Boundary Enforcement SHADOW: Direct I/O operations (O_DIRECT) require memory buffers to be aligned to physical block boundaries (typically 4KiB). Non-aligned writes trigger… | — |
| app_invariants__878ef3c94e31312b | INVARIANT: Monotonic Sequence Validation SHADOW: In the custom Grid RPC protocol, every mux server and client must track and verify strictly increasing sequence numbers (SendSeq/RecvSeq). This… | — |
| app_invariants__12ebcecd29c2c603 | INVARIANT: Temporal Determinism via UTC Synchronization SHADOW: Global system state, S3 signature calculation, and Lifecycle (ILM) evaluation are forced into the UTC timezone at the initialization… | — |
| app_invariants__c237b07e9792c4fd | INVARIANT: Cross-Device Mount Prohibition SHADOW: The system refuses to start if sub-mounts are detected within an export path. This ensures that the erasure set view is physically consistent; a… | — |
| app_invariants__bd1b69996575ce6e | INVARIANT: Deadline-Enforced Socket Reclaim SHADOW: The DeadlineConn wrapper mandates read/write timeouts on every network interaction. This prevents 'dead-end' or hung sockets from occupying file… | — |
| app_invariants__8ce757566cc414d1 | INVARIANT: Reference-Counted File Closure SHADOW: Read-locked files (RLockedFile) use atomic reference counting to delay the actual OS-level file close until the last concurrent reader has finished.… | — |
| app_invariants__a5ae045e3d272ba3 | INVARIANT: ILM Action Precedence SHADOW: Lifecycle evaluation logic (ILM) must prioritize Expiration over Transition if both occur at the same timestamp. This ensures deterministic object… | — |
| app_invariants__c123a151cb261fae | INVARIANT: Token-Bucket Bandwidth Isolation SHADOW: Bucket-level rate limiting uses token buckets to throttle I/O at the reader level. This prevents low-priority operations (like replication) from… | — |
| app_invariants__f81a3ceb66879596 | INVARIANT: Canonical Context Serialization SHADOW: Cryptographic context maps must be sorted and serialized deterministically (canonical JSON) before being used as Additional Authenticated Data… | — |
| app_invariants__b15a2026ddcc4e9e | INVARIANT: Strict Majority Write Quorum SHADOW: In a distributed lock system (dsync), a write lock MUST be granted by (N/2)+1 nodes to prevent split-brain consistency violations. Read locks require… | — |
| app_invariants__b3f3e43f0be1a913 | INVARIANT: Jittered Exponential Backoff SHADOW: Lock acquisition retries must utilize randomized sleep intervals (jitter) to break synchronization between competing goroutines. This neutralizes… | — |
| app_invariants__7a005ff1265c5a3b | INVARIANT: Resource-Path Key Binding SHADOW: Object encryption keys are derived using the unique bucket/object path as a salt. This enforces resource-level isolation; moving encrypted metadata to a… | — |
| app_invariants__ad4e3346768ef840 | INVARIANT: Non-Blocking Publisher Sovereignty SHADOW: In the PubSub architecture, message distribution to subscribers must be non-blocking. If a subscriber's buffer is full, the message is discarded… | — |
| app_invariants__9a59be2b555bcfd8 | INVARIANT: Strict Buffer Pool Homogeneity SHADOW: The BytePool MUST reject any buffer 'Put' back into the pool if its capacity does not match the pool's predefined 'wcap'. This prevents foreign or… | — |
| app_invariants__e70c022bdf852e7e | INVARIANT: Atomic DNS Update Simulation SHADOW: DNS 'Put' operations in the CoreDNS provider must execute a 'Delete' of the target bucket records before attempting the new 'Put'. This ensures that… | — |
| app_invariants__5d8d3035d9e91d6d | INVARIANT: The configuration store must provide a deterministic environment representation regardless of input format or source origin. SHADOW: This parser abstracts the underlying configuration… | — |
| app_invariants__55991569b2d75770 | INVARIANT: Log rotation must maintain a stable, non-blocking sequence of backup files while enforcing maximum retention policies. SHADOW: The logging subsystem manages the lifecycle of physical disk… | — |
| app_invariants__013e1bd55ea718e9 | INVARIANT: File-based JWT storage must perform updates through atomic operations that ensure the store remains in a valid, observable state. SHADOW: The JWT store handles sensitive authentication… | — |
| app_invariants__729eb94c9b0a21f9 | INVARIANT: Resource utilization accounting must be reflected accurately and atomically across clustered nodes to prevent localized policy exhaustion. SHADOW: JetStream manages strict resource… | — |
| app_invariants__87c1651ec92b143c | INVARIANT: The stream state (Msgs, Bytes, Sequence boundaries) must be atomic and consistent across all message blocks (mbs) and the central fileStore state. SHADOW: The fileStore architecture… | — |
| app_invariants__1e463a8ab16a456f | INVARIANT: Atomic directory renaming and file-system level sequencing ensure that tombstone markers and state updates remain consistent even during a crash. SHADOW: During a purge or truncate… | — |
| app_invariants__25c363069cfbf560 | INVARIANT: Internal server state for JetStream operations must be accessed under appropriate locking mechanisms to maintain data integrity. SHADOW: Concurrency control via mutexes and RWMutexes on… | — |
| app_invariants__6b82ccf567d455df | INVARIANT: The server must maintain consistent views of JetStream stream assignments across the cluster, especially concerning leadership and replica status, to ensure data availability and correct… | — |
| app_invariants__2ec6a93f771a8b31 | INVARIANT: Internal JetStream data structures, particularly queues (`ipQueue`) used for inter-process communication, must be managed with proper synchronization to prevent race conditions and ensure… | — |
| app_invariants__1928b1859a25e87b | INVARIANT: JetStream message storage operations (e.g., `StoreMsg`, `RemoveMsg`) must be atomic to guarantee data integrity, especially in clustered environments where consensus is required. SHADOW:… | — |
| app_invariants__08be1f9b7d378ba8 | INVARIANT: Deduplication state (`ddmap`, `ddarr`, `ddindex`, `ddtmr`) must be managed atomically and within defined time windows to prevent message duplication and ensure consistent deduplication… | — |
| app_invariants__3862521685482b51 | INVARIANT: Consumer state (`consumers` map, `cList`, `csl`) must be consistently managed, particularly regarding subject filtering and direct consumer tracking, to ensure accurate message delivery… | — |
| app_invariants__16057bb26aab75d2 | INVARIANT: The JetStream internal message processing queues (`msgs`, `gets`, `ackq`, `sigq`, `smsgs`) must be managed with synchronization primitives to ensure correct ordering and processing of… | — |
| app_invariants__4916ddcfc9f9df43 | INVARIANT: JetStream message ingestion and batching mechanisms must adhere to defined flow control limits (`MaxPending`, `MaxBatchSize`, `MaxBatchTimeout`) to prevent overwhelming the system under… | — |
| app_invariants__010e51fac9b9473e | INVARIANT: JetStream cluster state (`streamAssignment`, `node`, `catchup`, `catchups`) must accurately reflect the Raft group's state and peer status to maintain cluster consensus and handle leader… | — |
| app_invariants__e33f53ce885e7759 | INVARIANT: Internal JetStream state related to message deduplication (`ddmap`, `ddarr`, `ddtmr`) must be managed with strict time-based expiration to prevent duplicate messages from being processed… | — |
| app_invariants__781d2cd1974f21a8 | INVARIANT: The mapping of stream metadata (`StreamConfig`) to its underlying store (`StreamStore`) must remain consistent, and updates to configuration must be handled atomically to prevent state… | — |
| app_invariants__3163778f257bd222 | INVARIANT: The system must maintain a consistent view of stream and consumer assignments across a distributed cluster using a replicated state machine. SHADOW: Ensures that all nodes in a NATS… | — |
| app_invariants__2b142493d7e8ec34 | INVARIANT: Resource consumption must be bounded by explicit limits on connections, subscriptions, and payload sizes per account. SHADOW: Prevents a single misbehaving or malicious account from… | — |
| app_invariants__a4e5cb0f1ee170b6 | INVARIANT: Operations on stream messages and consumer acknowledgments must be deduplicated to ensure exactly-once processing semantics. SHADOW: Guarantees that network retries or re-deliveries do… | — |
| app_invariants__04fe8657417ae491 | INVARIANT: Configuration changes and state updates must be applied as atomic transactions to maintain system integrity. SHADOW: Ensures that the server never enters a partially-configured state… | — |
| app_invariants__16f5bca0191d9b12 | INVARIANT: Leadership in a raft-based cluster must be established via quorum to validate state transitions. SHADOW: Provides a reliable mechanism for electing a leader that can commit changes to the… | — |
| app_invariants__9e4104b96f6e213d | INVARIANT: Platform-specific resource abstraction for system telemetry and security primitives. SHADOW: Ensures consistent operational visibility and cryptographic identity across heterogeneous OS… | — |
| app_invariants__347af4d59ac8fb26 | INVARIANT: Deterministic subject-tree traversal and matching logic. SHADOW: Guarantees that wildcard-based subscription matching yields identical results regardless of the internal node structure or… | — |
| app_invariants__42af9ffd4091336a | INVARIANT: Temporal task scheduling via hierarchical timing wheels. SHADOW: Manages high-volume expiration events with O(1) complexity, preventing resource exhaustion during massive concurrent… | — |
| app_invariants__d6f78b1e708e3c24 | INVARIANT: Readers must only observe fully committed state boundaries, achieved by tracking high-watermarks of completed appends and low-watermarks of in-flight transactions. SHADOW: Prevents dirty… | — |