Unified file system managing method oriented to SCM

Abstract

The invention discloses a unified file system managing method oriented to SCM. The method includes the steps of firstly, reasonably decomposing metadata according to the characteristics of NVM storage devices of different types through the metadata decomposing and managing method oriented to the characteristics of the NVM storage devices of different types, distributing the metadata in the NVM storage devices of different types to be stored and managed, and establishing a collaborative metadata managing sub-system; secondly, designing a novel file data organizing mode through an integrated data unified managing method oriented to SCM, and decomposing and classifying files so that file data can be reasonably distributed in the NVM storage devices of different types. By means of the method, the NVM storage devices of different types in an SCM system can be managed in a unified mode, and the metadata and data management efficiency and access performance are effectively improved while the storage space of the storage devices of different types is fully utilized.

Description

technical field [0001] The invention belongs to the field of storage technology, and in particular relates to an SCM file management technology. It is mainly used to solve the problem of how to uniformly utilize the storage space of different types of storage devices, efficiently manage and access files in an SCM containing multiple DIMMs and PCI-E interface NVM storage devices. Background technique [0002] With the use of multi-core, multi-thread and other processor technologies, the gap between the rapidly increasing computing power in computer systems and the slow-growing storage system performance has become more and more significant, forming a serious storage wall problem. The new non-volatile memory device (NVM) has higher read / write speed and integration, lower power consumption and non-volatility, which has laid a good foundation for improving storage system performance and reducing energy consumption. New NVM devices such as MRAM are close to DRAM in terms of writ...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the integration degree and the number of DIMMs, when a large-capacity SCM built with NVM storage devices is used, the coexistence of DIMMs and PCI-E interface NVM storage devices will inevitably occur. Both DIMM interfaces and PCI-E interfaces have different access methods and speeds. There are huge differences. The existing memory and external memory management strategies are only for byte or block access methods, and cannot uniformly manage storage devices with different interface types and access methods

The access methods of different files are also different, generally including random and sequential access methods; the access characteristics of different files are also different, some files only access a small part, while others need to access the entire file; at the same time, metadata There are also great differences in the access frequency of data and data; therefore, a single file management strategy is difficult to meet the requirements of file management in SCM

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