![]() DATA EXPEDITION EXPEDAT SOFTWARETo 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). Index Terms-I/O throughput measurements, disk and host systems, performance analysis, differential and segmented re-gression, wide-area connections. We present a systematic analysis of wide-area memory and disk transfer throughput measurements, and establish that robust estimates of physical profiles can be generated using much less expensive emulated connections. We present a differen-tial regression method to estimate the differences between the performance profiles of physical and emulated connections, and then to estimate "physical" profiles from emulated measurements. The emulated connections could be of arbitrary lengths at significantly lower costs but only approximate the physical connections. The physical connections are limited by the infras-tructure and incur significant costs. We describe host and storage systems to support wide-area I/O transfers at 10 Gbps, and present measurements of memory and disk transfer throughputs over suites of physical and emulated connections of several thousands of miles. An assessment of such transport methods requires a systematic generation of throughput profiles from measurements collected over different system parameters and connection lengths. ![]() Long haul data transfers require the optimization and balancing of performances of host and storage systems as well as network transport. ![]()
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