Acta Metallurgica Sinica(English letters)

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Design, implementation and evaluation of write-enabled CramFS

1, 1,Chun-Ling CHEN1,Liang Yang2   

  1. 1.
    2. The Hong Kong Polytechnic University
  • Received:2010-09-26 Revised:2011-01-27 Online:2011-06-30 Published:2011-06-13
  • Contact: Chun-Ling CHEN
  • Supported by:

    QingLan project in Nanjing University of Posts and Telecommunications


The compressed ready-only-memory (ROM) file system (CramFS) has been widely used in Linux-based devices. However, it is a read-only filesystem which can not meet the requirement of today’s smart mobile devices because most of them require updating the software on the air (OTA). This paper presents a design and implementation of write-enabled CramFS which only introduces minor architecture changes and very limited space cost. The performance benchmark with other popular write-enabled filesystems also proves the feasibility of this solution.

Key words:

CramFS, filesystem, write-enabled, NAND