Reading Time: 4 minutes Managing the lifecycle of a complete software stack it’s something potentially complex because to the interdependence between the different layers, the order of the update or upgrade and the multiple software piecies (but also potentially some firmware/driver updates). For VMware vSphere there is VUM that can simplify ESXi lifecycle, but for example cannot manage the vCenter/PSC upgrade/update process. For VMware vSAN, VUM has been improved to consider the proper flow of the update process.