1. Virtual machine: VMware (vsp) and OpenStack
2. Distributed storage and distributed computing: Hadoop and Spark
Therefore, the calculation of halo is not so high. It is mainly divided into three parts. The first part, virtual machines, set up a few. The second part is distributed storage. If big data is equal to distributed storage, then halo computing is equal to distributed computing. Now, a hadoop or spark includes storage and calculation.
Therefore, gis + halo calculation = gis + hadoop (spark).
Of course, no transformation can be achieved in one step. Because any technology is risky. A small amount of energy should be invested first, such as a few computers as servers, and a small portion of key gis function tests. Then, slowly spread it to more computers and more functions.