Data Transfer Nodes (DTNs)
System Overview
The Data Transfer Nodes (DTNs) are hosts specifically designed to provide optimized data transfer between OLCF systems and systems outside of the OLCF network. These nodes perform well on local-area transfers as well as the wide-area data transfers for which they are tuned. The OLCF recommends that users use these nodes to improve transfer speed and reduce load on computational systems’ login and service nodes. OLCF provides two sets of DTNs: one for systems in our moderate enclave and a second for systems in the open enclave.
Interactive Access
DTN access is automatically granted to all enabled OLCF users. For interactive access to DTNs (ssh/scp/sftp), connect to dtn.ccs.ornl.gov (for the moderate enclave) or opendtn.ccs.ornl.gov (for the open enclave). For example:
ssh username@dtn.ccs.ornl.gov
For more information on connecting to OLCF resources, see Connecting for the first time.