concurrency

Part of an acquisition strategy which combines or overlaps two or more phases of the acquisition process, or combines development T&E with operational T&E.

When speaking of GridFTP transfers, concurrency refers to having multiple files in transit at the same time. They may all be on the same host or across multiple hosts. This is equivalent to starting up "n" different clients for "n" different files, and having them all running at the same time. This can be effective if you have many small files to move. The Reliable File Transfer (RFT) service utilizes concurrency to improve its performance.

A feature of parallel programming. Parts of a program whose executions overlap in time are said to execute concurrently. Java's thread feature support concurrency.