  The Object Store model has quickly become the basis of most commercially
successful mass storage infrastructure, backing so-called "Cloud" storage such
as Amazon S3, but also underlying the implementation of most parallel
distributed storage systems. Many of the assumptions in Object Store design are
similar, but not identical, to concepts in the design of Grid Storage Elements,
although the requirement for "POSIX-like" filesystem structures on top of SEs
makes the disjunction seem larger. As modern Object Stores provide many
features that most Grid SEs do not (block level striping, parallel access,
automatic file repair, etc.), it is of interest to see how easily we can
provide interfaces to typical Object Stores via plugins and shims for Grid
tools, and how well experiments can adapt their data models to them. We present
evaluation of, and first-deployment experiences with, (for example) Xrootd-Ceph
interfaces for direct object-store access, as part of an initiative within
GridPP\cite{GridPP} hosted at RAL. Additionally, we discuss the tradeoffs and
experience of developing plugins for the currently-popular {\it Ceph} parallel
distributed filesystem for the GFAL2 access layer, at Glasgow.
