In Ubiquitous computing environment the mobile devices such as PDAs necessarily connect to remote storage servers. We present an iSCSI caching system that localizes iSCSI target to overcome the shortcomings of iSCSI performance dropping sharply as the latency increases.

No abstract

Abstract.Mobile devices have difficulty in sustaining various services as in a wired environment, due to the storage shortage of the mobile device. The research[8] which provides remote storage service for mobile appliances using iSCSI has been conducted to overcome the storage shortage in mobile appliances. In research the proposed cache server performed well with relatively small files of sizes, however, did not perform well with large files such as database files, multimedia files, etc. The reason was the mobile device could not grasp the file as a whole and thus the cache server encountered frequent cache miss in spite of its huge buffer. In this paper we propose a proxy server that accommodates large files for mobile devices thus attains very high hit ratio.

Abstract. Requests for application services that require large data space such as multimedia, game and database[1] have greatly increased. Nowadays those requests locomote for various services using mobile devices. However, mobile devices have difficulty in sustaining various services as in a wired environment, due to the storage shortage of the mobile device. The research[5] which provides remote storage service for mobile appliances using iSCSI has been conducted to overcome the storage shortage in mobile appliances. In research we found that when iSCSI was applied to mobile appliances, iSCSI I/O performance dropped rapidly if a iSCSI client had moved from the server to a far away location. It occurred due to the specific character of iSCSI, which is very sensitive to delay time. In this paper, we suggest an intermediate target server that localizes iSCSI target to achieve a breakthrough against the shortcomings of iSCSI performance dropping sharply as latency increases when mobile appliances recede from a storage server.

No abstract