A web portal for hydrodynamical, cosmological simulations
  This article describes a data center hosting a web portal for accessing and
sharing the output of large, cosmological, hydro-dynamical simulations with a
broad scientific community. It also allows users to receive related scientific
data products by directly processing the raw simulation data on a remote
computing cluster. The data center has a multi-layer structure: a web portal, a
job control layer, a computing cluster and a HPC storage system. The outer
layer enables users to choose an object from the simulations. Objects can be
selected by visually inspecting 2D maps of the simulation data, by performing
highly compounded and elaborated queries or graphically by plotting arbitrary
combinations of properties. The user can run analysis tools on a chosen object.
These services allow users to run analysis tools on the raw simulation data.
The job control layer is responsible for handling and performing the analysis
jobs, which are executed on a computing cluster. The innermost layer is formed
by a HPC storage system which hosts the large, raw simulation data. The
following services are available for the users: (I) {\sc ClusterInspect}
visualizes properties of member galaxies of a selected galaxy cluster; (II)
{\sc SimCut} returns the raw data of a sub-volume around a selected object from
a simulation, containing all the original, hydro-dynamical quantities; (III)
{\sc Smac} creates idealised 2D maps of various, physical quantities and
observables of a selected object; (IV) {\sc Phox} generates virtual X-ray
observations with specifications of various current and upcoming instruments.
