Monitoring System

THIS SECTION OF GCUBE DOCUMENTATION IS CURRENTLY UNDER UPDATE.

A D4Science infrastructure manages various types of resources, such as:

• Hardware
• Services and Applications
• Collections and Auxiliary Resources

Hardware resources include gLite storage elements and computing nodes as well as gCube hosting nodes (containers), while gCube services and external software fall into the second category type, Collections and auxiliary resources can be data, metadata, indices, schemas or transformation utilities, among others.

All these resource information are put into gCube Information System (IS) which plays the role of the infrastructure's registry and supports the publishing, discovery and monitoring of all the parts that form the infrastructure. D4Science provides two monitoring tools, namely Fast Monitoring and Infrastructure Viewer, in order to provide quick organization and visualization of the resources and how they are related to each other. The tools are accessible at the Monitoring Webtool.

Fast Monitoring

The Fast Monitoring, shown in figure(TODO:figno), is the default tool where the user is also redirected by following the Monitoring Webtool link.

A screenshot of the Monitoring System. By default the Fast Monitoring tool appears.

The first step is to select a virtual organization (VO) and/or a virtual research environment (VRE) from a the drop-down list at the left hand side corner of the interface, called Select VO.

The main section is divided into two main panels. The left, organizes D4Science Resources in three manners.

• Resource Type contains general information about resources (gHN nodes, running instances e.t.c.) registered to the selected VO/VRE.

• WS Resource Type organizes information according to stateful resources maintained by specific Web Service running instances of a VO/VRE.

• Map where it binds information about resources to their geographical location.

The right panel, presents details about the selected (from the left panel) resources. Figure(TODO:figno) for example, shows the fast monitoring tool presenting the gCube Hosting Nodes (gHNs) registered to the d4science VO/VRE. Selecting a specific resource from the upper window refreshes the lower one with detailed information about that gHN in an XML-like manner. Similarly, one can gather information about other types of objects like Generic Resources or Running Instances. Figure(TODO:figno) shows the fast monitoring tool providing geographhhical information of running services in Athens.

Fast Monitoring enables someone to geographically locate resources.

Infrastructure Viewer

The interface is provided at Infrastructure Viewer and a screenshot is shown below.

The Infrastructure Viewer monitoring tool.

This webtool has been designed to provide different views for various purposes. Views can be for

• gHN (Sites, gCube Hosting Nodes, and Running Instances)
• Package (Service Archives, and Software Packages, and gHNs)
• Service (Service Classes, Service Names, and Running Instances)
• Data (Collections, Metadata Collections, and Indices)
• Package Dependencies
• Service Dependencies

Each view can be applied on a specific scope identified by:

• the Infrastructure,
• the Virtual Organization, and
• the Virtual Research Environment.

Additionally, each view provides specific metrics like CPU or disk space for gHNs, indices and meta-data collections for data, to name just few.

Figure(TODO:figno) depicts a spacial view for packages in d4science infrastructure for the FCPPS/FCPPS VO/VRE according to some metrics selected under the Advanced Options drop-down list