Object-based Storage Devices

Abstract

Object-based Storage Devices (OSD) is under intensive research and development both in industry and academia. The OSDFS (Object-based Storage Device File System), a file system for OSD has been designed, developed and implemented in the Linux user level. It is contains features to improve storage system performance in terms of both system throughput and storage space utilization under heterogeneous workload environments. The throughput performance tested in the experimental test bed by comparing its performance with general purpose file systems such as Ext2 and Ext3. Under the testing of five different workloads represented different applications, the OSDFS can perform better that Ext2 and Ext3 both for the READ and WRITE. The OSD simulation software has been designed and developed for OSD storage system performance study as well as file system design. The workload generation module incorporate with the OSD simulation software can generate both block-based workload and also object-based workload representing web server application. The disk drive simulation module of the OSD simulation which makes use of the actual extracted disk parameters from experimental test. The OSD simulation software has been validated and the READ error is within 4.7% and WRITE is within 12.7%.