Figure 2
From: Data handling strategies for high throughput pyrosequencers
Vnas distributed architechture. The figure shows, from right to left: A) A Vnas loop on the central database, detecting expired virtual sandbox files and removing them from the Grid. B) A Vnas loop on the local UI database and the Grid, polling for the status of the most recently submitted jobs. C) A job submission on UI2 by GridUser3, and more in detail: C1) User creates a job_home. C2) User invokes Vnas. C3) Vnas scans job_home (Submit_1), uploads the files to the grid (Submit_2) and creates the corresponding entries or updates the ''last usage'' timestamps for the uploaded files, on the Central Database (Submit_3).