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Using Xervmon for intend and provisioning redundancy across multiple availability zonesThe cost of downtimeDowntime costs enterprises money, in fact a great deal of money. The actual cost depends on the industry, but on average the revenue losses amount to betwixt $84,000 and $108,000 for every hour of unplanned downtime. That isnt the only loss on to that you need to add the intangible costs of the impact of downtime on record and loyalty.Managing downtimeThere is a big difference between scheduled and special downtime. Scheduled downtime is necessary in order to perform maintenance such as software patches, system configuration changes and database and hardware maintenance. Unscheduled downtime occurs typic entirelyy as the result of hardware or software misery or an event such as a power cut or environmental catastrophe. High availabilityDesigning a system for elevated availability is problematic. Increasing system complexity increases the get of possible failure points. Simply installing internal hardware redundancy isnt an manage as it means that the whole system must be interpreted down for maintenance. It is necessary so design the system so that it cannister be maintained without affecting service availability. Such a centering tool needs to satisfy three criteria high availability, fault border and scalability.High availability implies that the uptime of an application is 99.9999%, which is often termed five nines. It equates to a maximal downtime of 5.26 minutes a year which includes both planned and unplanned outages or downtime. Of course the ultimate goal is an application that has no downtime at all and is always available.Xervmon Solution Users can now unleash the power of visualized deployments with ... ... have been restored. ELB and Auto Scaling combine ideally ELB gives a wiz DNS name for addressing and auto scaling ensures there is always the right number of healthy Amazon EC2 instances to accept requests. Fault Toleranc eBuilding fault-tolerant applications on Amazon EC2 requires that the best practices are followed, for instanceCommission replacement instances speedilyAmazon EBS should be used for persistent storage six-fold Availability Zones along with elastic IP addresses. Multi AZ architectureBy distributing applications geographically one can achieve greater fault tolerance. As the Amazon EC2 commitment is 99.95% availability for every EC2 Region, it is essential to deploy applications across multiple AZs.Redundant instances are placed in distinct AZs and ELB depart automatically balance traffic across multiple instances and multiple AZs.