Technical report
The storage file system for MIDAS TPaaS
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- 7.2 Implemented facilities
7.1.2 The storage file system for MIDAS TPaaSThe storage file system is a flat file system based on S3 storage server. When a new tenancy is instantiated, a new bucket in the S3 storage server is created. The bucket namespace is tied to the name of the tenancy. The bucket will store all the files used or created by the users of a tenancy for testing activities. All the information stored is sandboxed with respect to the other tenancies. At actual implementation status, the users of such a tenancy do not store the information in specific directory namespaces inside the buckets. Only the test results are stored in a directory named testResults within the bucket. 7.2 Implemented facilities7.2.1 Development Environment (devenv_vm)The Development Environment is the facility provided to the TMD partners where all services are deployed in the same virtual machine. The Figure 26 shows a high level picture of the environment. More specifically, the Tenancy Admin Services, the End User Services and the Core Services are contained in only one virtual machine. The partners are enabled to deploy in their personal computer the TPaaS platform, by using the VirtualBox VMM as the provider. The virtual machine is composed of: TPaaS Portal: it is a basic web portal that allows human end users to log-in the TPaaS testing platform, to manage the end users in the tenancy (only the tenancy admin can access this utility), to access the storage service that provides users with a tool to upload their files (e.g., the TTCN-3 test campaign files), and to invoke the Test Generation and Execution upon these files, and last, a web page that informs the user about the state of his/her submitted tasks. TPaaS: this is built on top of an Apache Tomcat service container in which all the TPaaS services are deployed. TTCN-3 ExecEngine: TTCN-3 software tool to compile and execute the TTCN-3 scripts. In case, the commercial tool is used, the License Server, that is the license manager for the TTCN-3 ExecEngine software tool, is installed on a server outside the virtual machine used for the Development Environment. DB I&AS Table: it is the database table containing the identifiers of the tenancy users managed by the Identity & Authentications Service, described in 7.1.1. This database is built on top of a MySQL server instance. DB Test Method Table: it is the database table containing the Test MethodId, managed by the Test Method Query Service and described in 7.1.1. This database is built on top of a MySQL server instance. S3 Storage: it contains all files the users of a tenancy have uploaded (e.g. test models, TTCN-3 scripts, so on) or generated (test results, TTCN-3 script generated by model, and so on) for their testing activities.The S3 and DB facilities are provided in the Development Environment respectively by installing the Little S3 server (an emulation of the Amazon S3 server service) and the MySQL engine server. 
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