Title : High availability of database system
High availability of database system, in which unplanned downtime is no more than seconds or only a relatively few minutes per year, is frequently a key objective in a data protection strategies, and one of the keystones of business continuity. However, an too much emphasis on high availability can lead to problems with data preservation (all the money goes into keeping the systems up and very little goes into preventing data loss when they go down), data responsiveness (fault-resilient storage often does not restore as quickly), and data confidentiality (all the money goes into keeping the systems up and very little goes to protecting data from unauthorized exposure). As a result, an organization may not meet its real data protection goals and probably will spend more than necessary for data protection.
Figure 1: High availability depends on the entire IT infrastructure
High availability depends on the entire IT infrastructure (Figure 1) and not just on the storage part of that infrastructure. For example, if a network is unavailable for any reason, data on disk array that an application access over that network is also unavailable, even if the disk array is working perfectly.
All application do not have same level of availability. However, for those application that need high availability, all of the relevant components of the IT infrastructure have to be tuned to the same relative level of protection. Otherwise, a weakest-link-in-the-chain problem exists.
Under normal circumstances the overall of IT infrastructure is unlikely to have been designed for high availability. High availability is a relative terms. There are actually higher and higher levels of availability, w...
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...d to user requests will allow you some time to switch systems. The bottom line is that you must plan the infrastructure needed to ensure that all components of your application are using the high availability features built into Application Server 10g and the Real Application Cluster Database 10g.
SQL Server 2008 has a number of high availability technologies; Windows failover clustering provides a protections against server failure; database mirroring and log shipping provide protection against site and database failure; and others. Selecting the appropriate high availability technologies requires matching to your organization’s availability needs and budget to the capabilities and requirements of different high availability technologies. Different technologies provided by SQL Server 2008 are design to give different levels of availability and data protection.
The project will bring several changes to the company; it will first expand the current physical IT environment. It will provide the ability to increase the storage capacity of the current storage requirement and expected growth of data, while establishing a new data warehouse and business analytics applications and user interfaces. The project will also improve security by establishing security policies and it will leverage newer cloud based technology to provide a highly redundant, flexible and scalable IT environment while also allowing the ability to establish a low cost disaster recovery site.
Fault tolerance is the property that enables a system to continue operating properly in the event of a failure.
In order to prevent both intentional and unintentional alteration, and destruction of information, any software application needs controls to ensure the reliability of data. Here are two specific controls per each one of the three data control categories, and how each control contributes to ensuring the data reliability in the format requested.
DFS guarantees clients all functionality all the time when clients are connected to the system. By replicating files and spreading them into different nodes, DFS gives us a reliability of the whole file system. When one node has crash, it can service the client with another replica on different node. DFS has a reliable communication by using TCP/IP, a connection-oriented protocols. Once a failure occurred, it can immediately detect it and set up a new connection. For the single node storage, DFS uses RAID (Redundant Array of Inexpensive/Independent Disks) to prevent hard disk drive failure by using more hard disk, uses journal technique or strategy to prevent inconsistency state of the file system, and uses an UPS (Uninterruptible Power Supply) to allow the node to save all critical data.
...includes data security and other information data related systems. It is for this reason where business continuity development plans today have standby battery powered-backups to supply power just in case the other sources are non-operational.
...ial approaches which are Normal Accident and HROs, although it seems certain that both of them tends to limit the progression that can contribute toward achieving to highly protective systems. This is because the scope of the problems is too narrow and the potential of the solutions is too limited as well. Hence, Laporte and Consolini et.al., (1991) as cited in Marais, et.al., (2004) conclude that the most interesting feature of the high reliability organization is to prioritize both performance and security by the managerial oversight. In addition, the goal agreement must be an official announcement. In essence, it is recommended that there is a continuing need in the high risk organizations for more awareness of developing security system and high reliability environment in order to gain highly successful method to lower risk in an advance technology system.
Security helps the organization meet its business objectives or mission by protecting its physical and financial resources, reputation, legal position, employees, and other tangible and intangible assets through the selection and application of appropriate safeguards. Businesses should establish roles and responsibilities of all personnel and staff members. However, a Chief Information Officer should be appointed to direct an organization’s day to day management of information assets. Supporting roles are performed by the service providers and include systems operations, whose personnel design and operate the computer systems. Each team member must be held accountable in ensuring all of the rules and policies are being followed, as well as, understanding their roles, responsibilities and functions. Organizations information processing systems are vulnerable to many threats that can inflict various types of damage that can result in significant losses (Harris, 2014). Losses can come from actions from trusted employees that defraud the system, outside hackers, or from careless data entry. The major threat to information protection is error and omissions that data entry personnel, users, system operators and programmers make. To better protect business information resources, organizations should conduct a risk analysis to see what
Hardware, software, support and maintenance costs grow each year with multiple systems in each local region running different types of software and hardware. The application and hardware support teams are larger than could be possible with one integrated solution.
Flynn, Donal J.; "Information Systems Requirements: Determination and Analysis"; McGraw-Hill Book Company; 1992Parnas; 1985; taken from: Sherer, Susan A.; "Software Failure Risk – Measurement and Management"; Plenum Press; 1992Jones, Carpers; "Patterns of Software Systems Failure and Success"; Thomson computer press; 1996Neumann, Peter G.; "Computer Related Risks"; Addison-Wesley publishing company; 1995Petroski, Henry; "To Engineer is Human"; MacMillan Publishing; 1985Flowers, Stephen; "Software failure: management failure"; Chichester: John Wiley and Sons; 1996.Report of the Inquiry into the London Ambulance Service; February 1993. Simpson, Moira (1994); "999!: My computers stopped breathing !"; The Computer Law and Security Report, 10; March – April; pp 76-81Dr. Dobbs Journal; January 1997 edition<a href="http://catless.ncl.ac.uk/Risks">http://catless.ncl.ac.uk/Risks<a href="http://www.scit.wlv.ac.uk ">http://www.scit.wlv.ac.uk <a href="http://www.bbc.co.uk/news">http://www.bbc.co.uk/news<a href="http://abcnews.go.com/sections/travel">http://abcnews.go.com/sections/travel
The cloud storage services are important as it provides a lot of benefits to the healthcare industry. The healthcare data is often doubling each and every year and consequently this means that the industry has to invest in hardware equipment tweak databases as well as servers that are required to store large amounts of data (Blobel, 19). It is imperative to understand that with a properly implemented a cloud storage system, and hospitals can be able to establish a network that can process tasks quickly with...
Evaluate the scalability, dependability, manageability, and adaptability of Amazon Elastic Compute Cloud (Amazon EC2), Amazon Simple Storage Services (Amazon S3), and Right-Scale.
System performance is one of the most critical issues faced by companies dealing with vast amounts of data. Companies use database systems and their applications to store, retrieve and handle this data.
...mpany up and running through any kind of interruptions such as power failures, IT system crashes, natural or man-made disasters, supply chain/vendor problems and more.
Most health care providers currently utilize electronic health records (EHRs), or will in the coming future. Network collapses, glitches, power outages and flaws within the system all have the possibility of occurring. Due to the plethora of sensitive information contained within the health care field, health care providers need to form backup plans. These backup plans will serve as preventative measures in order to keep the integrity of the health care data intact. Therefore, contingency plans are a clear necessity within the field.
In our world, people rely heavily on the power of technology every day. Kids are learning how to operate an iPad before they can even say their first word. School assignments have become virtual, making it possible to do anywhere in the world. We can receive information from across the world in less than a second with the touch of a button. Technology is a big part of our lives, and without it life just becomes a lot harder. Just like our phones have such an importance to us in our daily lives, database management systems are the same for businesses. Without this important software, it would be almost impossible for companies to complete simple daily tasks with such ease.