Implementation of Multiple FTP Application using SCTP Multistreaming
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 6
Abstract
We identify overheads associated with FTP, attributed to separate TCP connections for data and control, non-persistence of the data connections, and the sequential nature of command exchanges. We argue that solutions to avoid these overheads using TCP place an undue burden on the application. Instead we propose modifying FTP to use SCTP and its multistreaming service. FTP over SCTP avoids the identified overheads in the current FTP over TCP approach without introducing complexity at the application, and still remaining “TCP-friendly.” We implemented FTP over SCTP in three ways: (1) simply replacing TCP calls with SCTP calls, thus using one SCTP association for control and one SCTP association for each data transfer, (2) using a single multistreamed SCTP association for control and all data transfers, and (3) enhancing (2) with command pipelining. Results comparing these 3 variations with the classic FTP over TCP indicate significant improvements in throughput for the transfer of multiple files by using multistreaming and command pipelining, with the largest benefit occurring for transferring multiple short files. More generally, this paper encourages the use of SCTP’s innovative transport-layer services to improve existing and future application performance.
Authors and Affiliations
Srikanth Porika
Keywords
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