Accordingly, several research efforts
have integrated different cloud data storage
services by providing a transparent
interface. Examples are Simple Cloud
API (http://simplecloud.com),
Simple API for Grid Applications (SAGA) with an SRM interface,
and some uniform services
such as PDC@KTH’s proxy
service12 and Open Grid Services Architecture
Data Access and Integration
(OGSA-DAI, www.ogsadai.org.uk) Web
services. In addition, a number of thirdparty
providers (DropBox, Mozy, and so
on) simplify online cloud storage access