GridFTP is a high-performance, secure, reliable data transfer protocol optimized for high-bandwidth wide-area networks http://www.globus.org/datagrid/gridftp.html
Grid version of the File Transport Protocol for moving large datasets between storage elements within a data grid. The implementation used in Grid3 is from the Globus Toolkit.
a high-performance, secure, reliable data transfer protocol optimized for high-bandwidth, wide-area networks based on FTP; two gridFTP clients are available in the software stack: uberFTP and globus-url-copy