Cell-Aware Child Task Routing Through Stateless Request Routers
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Solution Overview
Problem
Cell-based architectures offer performance benefits but face challenges in handling computational jobs with related tasks that require state maintenance between ephemeral runs, necessitating lightweight routing techniques to leverage these benefits without introducing latency or complex synchronization.
Innovation Solution
Implement a network-based service with request routing that assigns computational jobs to independent service cells, using cell identifiers to route subsequent tasks without requiring request routers to store assignment information, maintaining state across runs through cross-cell metadata.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If computational jobs are assigned to independent service cells in a cell-based architecture, then service performance and scalability are improved, but maintaining state between ephemeral runs becomes complex and requires synchronization
Solution Approach 1:
The patent extracts the state maintenance function from the request router by introducing cross-cell metadata that stores assignment information externally. This allows the router to remain stateless while jobs retain their assignment state through metadata references, separating the stateful job execution from the stateless routing infrastructure.
Solution Approach 2:
The patent introduces cross-cell metadata as an intermediary between service cells and the request router. This metadata layer mediates state information exchange without requiring the router to maintain state, enabling cells to reference job assignment information through metadata identifiers rather than direct state storage.
2Measurement precision
If request routers store assignment information to route subsequent tasks, then task routing accuracy is improved, but router complexity and memory requirements increase
Solution Approach 1:
The patent removes the state storage function from the request router by extracting assignment information into external cross-cell metadata. The router only performs lightweight lookups by job identifier rather than maintaining assignment state, dramatically reducing router complexity while preserving routing accuracy through metadata-based state retrieval.
3Stability of the object's composition
If cells communicate directly to share state information, then state consistency is improved, but network overhead and synchronization complexity increase
Solution Approach 1:
The patent introduces cross-cell metadata as a shared intermediary that all cells can access without direct communication. This metadata layer provides a centralized state repository that maintains consistency through controlled access patterns, eliminating the need for cells to establish direct communication channels and reducing network overhead compared to peer-to-peer state sharing.
Data Source
AI summary
Child tasks of computational jobs are routed to cells of a network-based service. A request received at a request router to perform a child task of a computational job may be received. The request router may parse the request to extract a cell identifier for the run of the computational job. The cell identifier may then be used to identify the cell out of multiple cells implementing the network-based service. The cell identifier may be provided by the cell as part of performing a parent task of the run of the computational job. Then, the request may be sent to the identified cell to perform the child task of the run of the computational job.