The goal of this work is to test solutions under equal network conditions and thus compare transmission performance of recent proprietary alternatives for FTP/TCP within 10 Gigabit/s networks where there are high latencies and packet loss in WANs.
#DATA EXPEDITION EXPEDAT SOFTWARE#
To assess the capabilities of current applications for fast data transport, the following commercial solutions were investigated: Velocity-a data transport application of BitSpeed LLC TIXstream-a data transport application of Tixel GmbH FileCatalyst Direct-a data transport application of Unlimi-Tech Software Inc Catapult Server-a data transport application of XDT PTY LTD ExpeDat-a commercial data transport solution of Data Expedition, Inc.
Common solutions, such as File Transport Protocol (FTP) based on TCP/IP stack, are being increasingly replaced by modern protocols based on more efficient stacks. This work compares commercial fast data transport approaches through 10 Gbit/s Wide Area Network (WAN). In this paper, we describe the congestion control algorithms used by UDT and provide some experimental results demonstrating that UDT is fast, fair, and friendly. To ensure these properties, UDT employs a novel congestion control approach that combines rate-based and window-based control mechanisms. In addition, UDT is friendly to concurrent TCP flows, which means it can be deployed not only on experimental research networks but also on production networks. Unlike TCP, UDT is fair to flows independently of their round trip times (RTT). UDT can utilize high bandwidth efficiently over wide area networks with high bandwidth delay products. We describe here a UDP-based application level transport protocol named UDT (UDP-based Data Transfer) with these properties and which is designed to support distributed data-intensive computing applications.
The challenge is to develop a protocol which is fast over networks with high bandwidth delay products, fair to other high volume data streams, and friendly to TCP-based flows. The TCP transport protocol is currently inefficient for high speed data transfers over long distance networks with high bandwidth delay products (BDP).
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