Read the case study and Explain the differences between image #1, #2 & #3.

Case Study Example

DTGOV establishes a set of high-availability virtual servers that can be automatically relocated to physical servers running in different data centers in response to severe failure conditions. This is illustrated in the scenario depicted in Figures 7.17 to 7.19, where a virtual server that resides on a physical server running at one data center experiences a failure condition. VIMs from different data centers coordinate to overcome the unavailability by reallocating the virtual server to a different physical server running in another data center.

Figure 7.17.

A high-availability virtual server is running in Data Center A. VIM instances in Data Centers A and B are executing a coordination function that allows detection of failure conditions. Stored VM images are replicated between data centers as a result of the high-availability architecture.

Figure 7.18.

The virtual server becomes unavailable in Data Center A. The VIM in Data Center B detects the failure condition and starts to reallocate the high availability server from Data Center A to Data Center B.

Figure 7.19.

A new instance of the virtual server is created and made available in Data Center B.

Read the case study and Explain the differences between image #1, #2 & #3.

Data Center A virtual servers virtualization platform physical servers hypervisor unavailable virtual server replicated storage VIM VIM coordination virtual private network resource replication (data) Data Center B VIM replicated storage hypervisor virtual servers virtualization platform physical servers Data Center A virtual servers physical servers virtualization platform hypervisor unavailable virtual server replicated storage VIM VIM coordination virtual private network resource replication (data) Data Center B VIM replicated storage hypervisor virtual servers virtualization platform physical servers Data Center A virtual servers virtualization platform physical servers hypervisor unavailable virtual server replicated storage VIM VIM coordination virtual private network resource replication (data) Data Center B VIM replicated storage replicated virtual server hypervisor virtual servers virtualization platform physical servers