A data-gateway

a gateway-based framework

is proposed to solve the problems in grid data interoperation

such as heterogeneous storage resources

different job requirements

and numerous failures. The data-gateway is a professional solver for data interoperation that can make the data interoperation as an independent and general modular separated from job inter-operation

and promote parallel processing of the interoperation tasks. A job description language based on ClassAD is introduced in the data-gateway

which can provide a very flexible and extensible data model

and can be used to describe arbitrary services and constraints

as well as the scale mechanism in a plug-in style so that the scalability of the data-gateway for heterogeneous storage resources is improved well. Dynamic protocol selecting mechanism and failure recovering mechanism used in thedate-gateway can provide a nice environment like failure-free network and storage devices

and enhance the system's availability. Experiment results show that the data-gateway can implement data interoperation between heterogeneous grid infrastructures rapidly

recover failures automatically without any human interaction

and complete all kinds of data interoperation tasks efficiently.