| Summary: | 碩士 === 國立交通大學 === 資訊工程研究所 === 81 === This thesis presents the design of Log-Structured Diverging
File System (LDFS). The basic concept of LDFS is to change the
role of file system from a logical process in operating system
to a physical processing component of operating system. There
are three principle functions provided by LDFS : (1) By strip-
ping file data across multiple disks, which are management by
Disk Processors, the file transfer rate is not limited by the
performance of a single disk. (2) By dividing file processing
into two levels(logical level and physical level) of processors
and using file caching technique in each processor, it greatly
reduces the impact of disk I/O on file access. (3) By the
log- structured storage management and the internal transaction
pro- tocol between FP and each DP,the consistency of file data
stored in all disks can be restored when system crash occurs.
We have built a prototype of LDFS and performed some evalu-
ations on it. The results show this LDFS prototype is
performing well and has the capability to performs still better.
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