Service Availability: Principles and Practice
Access to past paper exam materials. Our LCCI International Qualifications in Business Principles and Practice help learners to develop their knowledge and understanding of how businesses are organised and managed operationally and financially, and how they interact with the commercial world.
They're suitable for those wanting to build on their understanding of modern business management practices to improve their career opportunities or academic progression. Level 3 Accreditation status: Financial and Quantitative Specification codes: International only Assessment availability: On demand and series 2,3,4 First teaching: Tue Dec 31 Tue Jun 30 User tabs Teaching Studying. The related Disaster Recovery topic focuses upon a major failure of the primary data center requiring failover to a secondary disaster recover data center or fundamental rebuild of the primary data center.
This topic outlines the different principles of HA that you should consider when designing a Rational development environment. It is critical that HA is considered from the outset of designing your environment because the design itself will constrain the HA solution.
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HA that is developed as an afterthought may result in significant rework of the environment or result in a suboptimal solution. However, the first thing to consider is what are your organizations real requirements for HA based on your business and technical needs and requirements for the environment itself.
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- High availability;
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Availability - "number of nines" Availability is usually expressed as a percentage of up-time. The notion of "number of nines" relates to increasingly higher levels of availability, where a greater number of nines signifies a greater percentage of HA or up-time. For example, "Five nines" equates to an up-time of The following table shows the downtime per year, month and week allowed for a particular percentage availability assuming that the environment is required 24x7x 6 days a year.
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