Dissertaç ˜ao de Mestrado Mestrado em Engenharia Informática Jo ...

6. INTEGRATION WITH VIRTU 6.3. VIRTU Architecture
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Figure 6.2: VIRTU Logical View
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Configurations and Instances and users reports and suggestions. The VIRTU Block
Datastore is the physical storage for the available Building Blocks. The VIRTU
Application Server provides access to the tool for users and administrators, together with
the processing logic. The Virtualization Services is where the virtualization is handled.
It contains the virtualization servers and the existing virtual machines. Finally, the Eclipse
Views and Web Front-End are interfaces used to allow interaction with the user through an
application or a typical web browser.
6.3 VIRTU Architecture
The VIRTU tool arcitecture is structured in a three-tier architecture, as depicted in Figure 6.3.
Following is description of each layer and the respective components.
6.3.1 Data and Resources Layer
The Data and Resources Layer provides the storage utility for the system and hosts the
system’s virtualization layer. It is composed by the Block Datastore, the Configuration
Database and Virtualization Services.
Block Datastore
The Block Datastore is an abstraction for the physical storage of the Building Blocks
. It may have multiple instances and can be distributed over different physical locations. It
allows Building Blocks from another system to be uploaded, to create, modify and delete
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