RTFTL: design and implementation of real-time FTL algorithm for flash memory

He, Qinlu; Bian, Genqing; Zhang, Weiqi; Li, Zhen

doi:10.1007/s11227-022-04602-4

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…If the map blocks pool has no unused sectors during the recording job, the erase operation must switch to another free map blocks. We can cache the mapping table in RAM for fast lockups [5]. As a consequence, during the power-on process, we must reconstruct the mapping table in RAM.…”

Section: Revisit Map Block Methodsmentioning

confidence: 99%

“…When the data has been modified or changed, we can use the shadow paging table to retrieve the old mapping information. The system would be corrupted if the mapping table is modified or changed [5]. Our scheme, which employs shadow technology, is capable of resolving this issue and recovering the mapping table records as shown in Figure 4.…”

Section: Proposed Technique (Rslsp)mentioning

confidence: 99%

“…It supports out-of-place updates. In order for an update to be implemented to a page, it should be erased before performing the update [5]. For this purpose, a method referred to as 'Garbage Collector' is employed, in which pages are either labelled valid or invalid [6].…”

Section: Introductionmentioning

confidence: 99%

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RSLSP: An Effective Recovery Scheme for Flash Memory Leveraging Shadow Paging

Alahmadi

Chung

2022

Electronics

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The flash storage is a non-volatile semiconductor device that is constantly powered and has several advantages such as small size, lower power consumption, fast access, convenient portability, heat dissipation, shock resistance, data retention next to a power off, and random access. Flash memory is presently being incorporated with distinct embedded system devices such as with digital cameras, smart phones, personal digital assistants (PDA), and sensor devices. Nevertheless, a flash memory entails special features such as “erase-before-write” and “wear-leveling”, an FTL (flash translation layer) upon the software layer should be included. Although, the power off recovery plays a significant role in portable devices, most FTL algorithms did not consider the power off recovery scheme. In this paper, we proposed an effective scheme for the recovery of flash memory leveraging the shadow paging concept for storage devices using flash memory. To combat the sudden power off problem, the suggested RSLSP approach saves and keeps the map block data as a combination of two tables, i.e., first is the original block and the second block is a replica for the original one. Our proposed strategy not only improves the capacity of a flash memory device as compared to the state-of-the-art schemes suggested in the literature, but is also compatible with the existing FTL-based schemes.

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Section: Revisit Map Block Methodsmentioning

confidence: 99%

Section: Proposed Technique (Rslsp)mentioning

confidence: 99%

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RSLSP: An Effective Recovery Scheme for Flash Memory Leveraging Shadow Paging

Alahmadi

Chung

2022

Electronics

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“…Derived from previous studies [9][10][11][12][32][33][34], one of the primary reasons affecting the TCP transmission rate is that data are copied back and forth between the kernel and user space, significantly increasing CPU usage. Therefore, the critical problem in improving the performance is eliminating cumbersome data in the host CPU.…”

Section: Comparison Of Rdma Technology and Tcpmentioning

confidence: 99%

“…It reduces computing resource consumption while guaranteeing extremely low transmission latency. However, most of the current optimization work of RDMA for distributed file systems only uses RDMA libraries or plug-ins as communication submodules of the system, and does not make full use of the excellent features of RDMA [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Accelio, the RDMA middleware used in CephFS, encapsulates the underlying RDMA network functions and only provides an abstract call interface [28,29].…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of a Distributed File System Based on RDMA

Gao

Zhang

et al. 2023

Applied Sciences

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With the rapid development of computer and network technology, to deal with explosively growing mass data correctly, distributed file systems have come into being, and they have been applied in many enterprises. However, in the packet storage process, the traditional TCP/IP transmission protocol has to pass through the operating system and application software layer. It takes up many server resources and memory bus bandwidth, which places a heavy burden on the server’s CPU and memory. In this paper, we analyze the research status of the distributed file system based on analyzing and comparing the advantages of RDMA over traditional TCP Ethernet communication architecture. We propose an optimization scheme for the network transmission performance of the original FastDFS to replace the original TCP module with an RDMA network communication module, and we design a lightweight distributed file system with higher performance than the original FastDFS, which is suitable for small file storage. Using the zero-copy technology and kernel bypass technology of soft RDMA, the network communication mechanism in FastDFS is optimized to free the server’s CPU from heavy data processing work. In this paper, the RDMA-based FastDFS is compared with the original FastDFS. The test results show that the network transmission performance of the optimized FastDFS is improved compared with the original FastDFS, which achieves the expected effect and can better meet the requirements of mass small file storage for today’s Internet applications.

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Dynamic decision-making strategy of replica number based on data hot

Zhang

Bian

et al. 2023

J Supercomput

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RTFTL: design and implementation of real-time FTL algorithm for flash memory

Cited by 5 publications

References 23 publications

RSLSP: An Effective Recovery Scheme for Flash Memory Leveraging Shadow Paging

RSLSP: An Effective Recovery Scheme for Flash Memory Leveraging Shadow Paging

Design and Optimization of a Distributed File System Based on RDMA

Dynamic decision-making strategy of replica number based on data hot

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