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- Consider, for instance, the database management system that is used by an airline; such a system often has snapshot isolation as one of its many capabilities. I was hoping that you could provide me an example of a non-serializable execution that the airline is ready to endure in order to get better performance as a whole. If you could, that would be much appreciated.In unit eight, we are introduced to advanced database topics. In typical client–server systems the server machine is much more powerful than the clients; that is, its processor is faster, it may have multiple processors, and it has more memory and disk capacity. Consider instead a scenario where client and server machines have exactly the same power. Would it make sense to build a client–server system in such a scenario? Why? Which scenario would be better suited to a data-server architecture? Database systems are in use everywhere in our society. Explain the advantages of cloud computing over the traditional IT model (Table 10.1) and reference 2 additional websites.Some database operations such as joins can see a significant difference inspeed when data (e.g., one of the relations involved in a join) fits in memoryas compared to the situation where the data do not fit in memory. Showhow this fact can explain the phenomenon of superlinear speedup, where an application sees a speedup greater than the amount of resources allocated to it.
- Consider a server with two clients running independent multi-threaded databases. Client 1 has paid for 75% of the available CPU resources, while Client 2 has paid for 25%. How would you ensure that each client got their requested (paid for) share of CPU resource?Take, for example, a snapshot-isolated database management system like the one employed by an airline. I was wondering if you could provide me an example of a non-serializable execution that the airline is willing to endure in exchange for greater speed.Consider a database system based on a client-server architecture, with the server acting as a data server. A. What is the effect of the speed of the interconnection between the client and the server on the choice between tuple and page shipping? B.. If page shipping is used, the cache of data at the client can be organized either as a tuple cache or a page cache. The page cache stores data in units of a page, while the tuple cache stores data in units of tuples. Assume tuples are smaller than pages. Describe one benefit of a tuple cache over a page cache.
- A database has been designed to display a list of popular movies and also a list of actors acting in these movies. The relationship that would exist between the related tables would be: O many to many one to many O many to one O one to oneThe following is a description of manufacturing company’s purchasing procedures. All computers in the company are networked to a centralized accounting system so that each terminal has full access to a common database. The inventory control clerk periodically checks inventory levels from a computer terminal to identify items that need to be ordered. Once the clerk feels inventory is too low, he chooses a supplier and creates a PO from the terminal by adding a record to the purchase order file. The clerk prints a hard copy of the PO and mails it to the vendor. An electronic notification is also sent to AP and receiving, giving the clerks of each department access to the PO from their respective terminals. When the raw materials arrive at the unloading dock, a receiving clerk prints a copy of the PO from his terminal and reconciles it to the packing slip. The clerk then creates a receiving report on a computer system. An electronic notification is sent to AP and inventory control, giving…Assume you have been contracted by a university to develop a database system to keep track of student registration and accommodation records. The university courses are offered by faculties. Depending on the student’s IQ, there are no limitations to how many courses a student can enroll in. The faculties are not responsible for student accommodation. The university owns a number of hostels and each student is given a shared room key after enrollment. Students share a room with 3 other students. Each room has furniture attached to it. a) Identify the main entities for the project. b) Add your own attributes to each entity – minimum of 3 and a maximum of 5. c) Create a primary key for every entity. d) Using your answers for (a) - (c), draw a single ER diagram to represent the data by making use of any means (drawing by hand, drawing in word or any other graphic program or by making use of Oracle SQL Data Developer Modeler.)
- A private bank, for example, call it Bank Podo, has many branches spread across several cities in America. Bank Podo's approach prioritizes customers in remote areas, where of course in these areas there are difficulties in terms of infrastructure such as the Internet. But because Bank Podo's mission is to serve the archipelago, infrastructure constraints are not used as an obstacle in providing services. The IT Division made the decision to build a distributed database, where each branch has its own database that specifically manages data in that area, which means that each branch has its own database. However, even though the databases are separate, each branch can read each other (share) the data of other branches, so that the user feels that all the databases are one or this condition is called distribution transparency. 1. In distributed databases we are familiar with issues such as fragmentation, allocation and replication. What types of issues are included in Podo Bank?A private bank, for example, call it Bank Podo, has many branches spread across several cities in America. Bank Podo's approach prioritizes customers in remote areas, where of course in these areas there are difficulties in terms of infrastructure such as the Internet. But because Bank Podo's mission is to serve the archipelago, infrastructure constraints are not used as an obstacle in providing services. The IT Division made the decision to build a distributed database, where each branch has its own database that specifically manages data in that area, which means that each branch has its own database. However, even though the databases are separate, each branch can read each other (share) the data of other branches, so that the user feels that all the databases are one or this condition is called distribution transparency. 1. In distributed databases we are familiar with issues such as fragmentation, allocation and replication. What types of issues are included in Podo Bank? 2. If a…A clothing manufacturer produces woollen jumpers in a variety of sizes and colours. These are stored in a warehouse and each location in the warehouse contains jumpers that are all the same colour and all the same size. Each of the different sizes is available in all the different colours, and each combination of size and colour can be found in only one location in the warehouse. The manufacturer uses a relational database to record information about what is stored in each location in the warehouse. There is a table, Warehouse, with three attributes: Size, Colour, Location. Below are listed four possible functional dependencies for the table. Not all of these hold. For each dependency, state whether it holds or not. Justify the reason for your decision in each case by referring to the description at the start of the question. Location → Size, Colour Location, Size → Colour Colour, Size → Location Colour → Size, Location