Allocation table(FAT) system architecture. The FAT table identifies the software that the user is about to launch and compares it with the previous runs of the same application on the system to determine the integrity and validity of the new instance of that application. Another solution is to use a very secure and unbreakable hypervisor from cloud provider's end. Infrastructure failures pose another challenge for the cloud computing because users want dependability and uninterrupted service. One such type of infrastructure failure is power outage that creates a havoc and downtime for those who depend on these cloud services. On June 2012 a big storm in the East Coast caused a prolonged downtime for AWS services due to power failures at several Amazon datacenters located in Northern Virginia. The recovery from this power outage and server downtime took a very long time and exposed several problems that could have been prevented. For example, in several of the datacenters failed to switch to backup generators because the uninterrupted power supply(ups) devices didn't work. Another problem was that the AWS tool that allows users to switch to different server in different region in case of outage didn't function properly. All these problems could have been prevented easily if Amazon had a contingency plan for these kind of special circumstances. From user perspective also there are several steps that could be taken to prevent the system interruption. For example, as user you can back up your data in a local hardware that could be accessed in case of such outages. Encryption of cloud data and business insurance against data loss are another solutions that can minimize the risks against the security and infrastructure failures.
Cloud system failures 5 References 1. Chimere Barron, Huiming Yu and Justin Zhan." Cloud Computing Security Case Studies and Research". World Congress on Engineering 2013 Vol II, WCE 2013, July 3 - 5, 2013, London, U.K. 2. Cloud Security Alliance, “Top threats to cloud computing”, Cloud Security Alliance, March 2010.
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- ALBERT DOMINIC
- SYN flood, Cloud System failures