Figure 6

Invoking tools for traditional and EMR cluster. The web-interface page shows MegaBlast tool where the tool parameters are set. The user enters the path to the data on the S3 account or uploads the data directly to the tool. The lower left screen shot include the web-interface of using the elastic MapReduce service (EMR), where the user specifies the EMR cluster, initialization scripts, and command line to be executed, as explained in the manual. The lower-right screen shot is for generic submission of jobs on traditional cluster. In this case, the user has own software tool (in compatible and executable format), which resides in the cloud. The user specifies the location of this tool, specifies the command line, and specifies the input and output data. This web-page enables execution of this tool on the system. More details are given in the manual.