"Local government is almost always multi-tier and multi-service.
These are the big challenges for us, since we are considering multi-tier and stateful applications.
Furthermore, we proposed a framework for providing high availability services, and also presented requirements to deal with multi-tier and stateful applications.
From REQ F.4 to F.6, we have determined that the framework must deal with a specific type of application: multi-tier and stateful.
The NoPaaS was designed to support the deployment of multi-tier and stateful applications deployment, providing services that include checkpoint, session migration, and failure recovery.
Moreover, an SDN-based resource allocation and load balancing algorithm is developed to enhance the spectrum efficiency and users' QoS of the multi-tier and multi-RAT wireless network in [163].
Furthermore, REQ A.2 was defined in order to guarantee the multi-tier and stateful applications handling by the NoPaaS, and REQ A.3 was stated to facilitate and standardize the communication between application' tiers.
In addition, interference issues multiply with multi tier architecture.
The Enterprise Edition enables users to clone, migrate and failover multi-tier apps and services into the AWS EC2 cloud.
As a result of the further marketisation proposed in the higher education green paper and cuts to maintenance grants, thousands of students will be priced out of education and the whole structure of the sector will change, creating a multi-tier system and attacking poorer students and institutions".
Following this same strategy, Perez-Sorrosal et al. [21] propose a multi-version database cache framework to support elastic replication of multi-tier stateless and statefull applications.
