In order to deliver on-demand HPC services for multi-tenants and solve software dependency problems which rigidly restrict the usage of HPC applications. On the premise of not destroying the existing large scale high performance cluster management. a lightweight HPC cluster delivery model was designed and implement with the Fat-Tree network topology and the virtual HPC cluster model. ... https://www.jmannino.com/quick-offer-Viqua-F4-50-Plus-Monitored-UV-System-Powered-by-UVMax-15-gpm-230-Volt-on-sale/