Read handling in zoned namespace devices
CN114203237BActive Publication Date: 2026-07-07SANDISK TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SANDISK TECH
- Filing Date
- 2021-06-07
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
In partitioned namespaces (ZNS), traditional read-ahead prediction methods, which do not consider partitioned namespace configuration, result in low prediction success rates and wasted resources, and cannot effectively optimize read performance.
Method used
The storage device controller limits the pre-fetching of data based on the zone configuration indicated by the host. By limiting the amount of data in the RLA and predicting it, the controller optimizes read operations to increase the likelihood of successful predictions and improve resource utilization efficiency.
Benefits of technology
Improved read performance optimization in partitioned namespaces, increased successful forward read prediction rate, saved resources and improved efficiency of flash storage devices.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN114203237B_ABST
Abstract
Aspects of a storage device including a memory and a controller are provided that optimize read look ahead (RLA) performance based on zone configurations or stored metadata. The controller stores information previously received from a host in the memory, including zone configurations or other information that can determine metadata associated with subsequent data to be pre-fetched in an RLA. When the stored information includes the zone configurations, the controller reads data from the memory in response to a host command and limits pre-fetching of subsequent data from the memory based on the zone configurations. When the stored information includes metadata, the controller reads the metadata associated with subsequent data from the memory and limits pre-fetching of the subsequent data based on the metadata. Thus, resources of the storage device typically used for RLA can instead be used for other operations, improving the efficiency of the storage device.
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