WU Fault Tolerance Systems Questions
Description
Active/active systems represent the cutting edge of highly available architectures. Able to fail over in seconds rather than minutes, hours, or days, they safeguard data with extraordinary reliability. However, active/active architectures are not necessarily the best choice for all information systemsn organization must consider key variables such as cost, maintenance, and staffing when selecting its fault-tolerance requirements.
Throughout this course, you have encountered a number of different system architectures, a few of which are listed below. Each has its own benefits and risks, and each appropriately addresses the needs of different companies.
Tape backup
Asynchronous Replication
Cluster
Active/passive
Active/active
Bunkering
Companies’ availability needs fall along a spectrum, due to factors that include personnel and budgetary constraints. Additionally, the degree to which a business relies on an information system and the requirements placed on that system by stakeholders and regulatory agencies often dictate which infrastructure will be required.
Fault tolerance is not a one-size-fits-all solution. Understanding the specific characteristics of different high availability configurations and implementing them aptly represents the first step toward establishing a successful and reliable data infrastructure.
Construct a table that compares the bulleted systems above. Provide the following information for each:
A brief summary of the system itself, including its components, how it responds to failure, and how data may be affected when an outage occurs.
A typical range of values for its reliability parameters: availability, RTO, and RPO.
One type of organization whose data center/information system needs would be fully satisfied by that architecture, and why.
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