CXL Tagged Memory Copy and Snapshot for Data Version Isolation
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Solution Overview
Problem
Existing memory systems lack efficient mechanisms for managing and manipulating tagged capacity units in Compute Express Link (CXL) memory devices, limiting flexibility and efficiency in data management and storage operations.
Innovation Solution
Implementing copy and snapshot commands that allow host systems to manage tagged capacity units by copying data between tagged capacity units and creating snapshots of data states, using selection policies to control allocation and access, thereby enhancing flexibility and efficiency in data handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional memory management mechanisms are used in CXL memory devices, then system stability is maintained, but flexibility and efficiency in managing tagged capacity units are limited
Solution Approach 1:
The patent segments memory capacity into tagged capacity units (TCUs) that can be independently managed, allocated, and accessed. Each TCU is associated with a unique tag identifier, enabling fine-grained control and flexible management of memory resources without requiring complex global management mechanisms.
Solution Approach 2:
The patent implements preliminary allocation of tagged capacity units to host systems before actual data storage operations. The fabric manager pre-allocates TCUs and assigns tag identifiers, establishing a structured framework that simplifies subsequent data management operations and improves overall system efficiency.
2Productivity
If data copying between memory locations is performed using traditional methods, then data duplication is achieved, but access efficiency and processing speed are reduced
Solution Approach 1:
The patent implements efficient data copying mechanisms where the fabric manager can copy data between tagged capacity units by manipulating tag identifiers and physical address mappings. This allows rapid data duplication and versioning operations without requiring complex data movement protocols, significantly improving access efficiency.
Solution Approach 2:
The fabric manager acts as an intermediary that handles data copying operations between host systems and tagged capacity units. It manages the tag-to-physical-address mappings and coordinates data movements, reducing the time required for data copying by centralizing control and optimizing transfer operations.
3Reliability
If snapshots of data states are created for preservation, then data state history is maintained, but system performance and resource utilization are impacted
Solution Approach 1:
The patent creates snapshots by copying tag identifiers and associated metadata to preserve data states at specific points in time. This lightweight copying approach maintains data state history without duplicating entire data sets, thereby preserving reliability while minimizing performance impact and resource consumption.
Solution Approach 2:
The patent extracts only the essential elements for snapshotting (tag identifiers, capacity unit mappings, and metadata) rather than copying complete data sets. This selective extraction maintains data state history for reliability while significantly reducing the performance overhead and resource utilization associated with comprehensive data duplication.
Data Source
AI summary
A system can include a memory device comprising a plurality of dynamic capacity devices and a processing device, operatively coupled with the memory device. The processing device is configured to perform operations including receiving a host command to copy data associated with a first tag, wherein the first tag is associated with a first memory section of the plurality of dynamic capacity devices, and wherein the first memory section is allocated to a first host system to store the data; responsive to receiving the host command to copy. The operations further include determining a second memory section of the plurality of dynamic capacity devices, associating a second tag with the second memory section and storing the copied data associated with the first tag in the second memory section associated with the second tag.