SaaS Clouds Supporting Biology and Medicine - Cloud Computing with e-Science Applications - page 253

Graphical
Interface

Uncinus Interfaces

mySQL DBMS

SaaS
Layer

Resource
Deployment
Recorder

Argument to
Interface
Parser

Compute
Resource
Allocator

Secure Data
Transfer

HPCaaS
Layer

Amazon API SSH

IaaS Layer Amazon EC2

FIGURE 11.4
Uncinus software overview.

The application broker allows an application service provider to publish AMIs
or applications. To publish an AMI, a machine image identifier, username, and
working directories need to be provided. When publishing applications,
the machine image identifier in which to install the package, installation
instructions, any required installation files, a list of input arguments, and
output controls need to be provided. The RDR stores these data in a mySQL
database on behalf of the cloud service provider. The AIP service translates
the input arguments recorded by the broker into equivalent web controls,
allowing for dynamic interface generation. End users accessing the Uncinus
system can select from the published AMIs and application modules to cus-
tomize their cloud deployment.
The HPCaaS model communicates with Amazon EC2 to provide cloud
resources to the user. When a user starts a cloud job, the CRA module creates
the necessary private keys and security groups before requesting resources
from Amazon EC2. Once the CRA can successfully access the virtual
machine, the SDT module is used to deploy application modules to the virtual
machine instance.

11.4.4.1 Features of Uncinus

Uncinus combines the HPCaaS model with an application broker to pro-
vide the features of the framework detailed in Section 11.3. Automated