High Availability

  • Best Practices of Oracle Database with Real Application Clusters 12c High Availability

    Best Practices using of Oracle RAC 12c for Database High  AvailabilityApplying MAA Principles

    Begin with a business impact analysis

    1. Assess impact of downtime & data loss
    2. Define service level objectives
      • Recovery Time Objective (RTO):
        - How long can you afford to be down?
      • Recovery Point Objective (RPO):
        - How much data can you afford to lose?
      • Performance:
        - pre and post failure

    Oracle Database 12c MAA

  • High Availability and Oracle solutions

    High Availability and Oracle database solutionWhen availability is crucial for a business, extremely high levels of disaster tolerance must allow the business to continue in the face of a calamity, without the end users or customers noticing any adverse consequences. The effects of global companies conducting business across time zones spanning “24 × 7 × forever” operations, e-commerce, and the challenges associated with today’s “flat world” all-drive businesses to achieve a level of disaster tolerance capable of ensuring continuous survival and profitability.

    Different businesses require different levels of risk with regard to loss of data and potential downtime. A variety of technical solutions can be used to provide varying levels of protection with respect to these business needs. The ideal solutions would have no downtime and allow no data to be lost. Although such solutions do exist, they are expensive, and hence their costs must be weighed against the potential impact of a disaster and its effects on the business.

  • High Availability Business Scenarios

    Business Scenarios for High AvailabilityIn the following blog I present four high availability business scenarios that have been hand selected based on their clear need for some type of high availability solution. Each of the following sections provides a short summary of a business scenario, followed by a much more in-depth description as each business scenario is identified and matched to a particular high availability solution. For each one I describe a complete software and system stack depiction, along with the specification of the high availability primary variables (gauge). Your company may have business scenarios similar to these and, at the very least, you should be able to correlate these high availability solutions to ones that will fit your applications’ high availability needs. All these business scenarios are Microsoft-based applications with various high availability/fault tolerant hardware configurations in place.

  • Microsoft Technologies That Yield High Availability

    High Availability Microsoft TechnologiesSeveral mainline technology offerings from Microsoft allow you to design a tailored high availability solution (solutions in the field of high availability offers another giant - Oracle) that best matches your company’s availability needs. As mentioned earlier, this book focuses on the most viable and production-worthy options, including the following:

  • What is High Availability? Main Concepts

    High Availability overview and basic conceptsAvailability is the time that business services are operational. In other words, availability is a synonym of business continuity. And when it comes to IT Infrastructure, systems, site, or data center, availability reflects the span of time applications, servers, site, or any other infrastructure components that are up and running and providing value to the business.

    The focus of this article is based on the IT Infrastructure and data center availability leading to business uptime.