Distributed query and transaction processing, Database Management System

Distributed query and transaction processing

a.  Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require reconstruction of at least two horizontal and two vertical fragments, as well as a choice of one replica.

b.  Using the centralised schema of 3, show an optimum query plan for your query.

c.  Show two distributed query plans for your query. One assumes all data is transported to another site. The other plan achieves close to minimum data transport and use of at least one semijoin. Using the quantitative analysis of 2 and assumptions based on 3 and 4, estimate the cost of each plan in terms of bytes of data transmitted. Show your working.

d. Sketch a process to update the product catalogue. The process will have a coordinating transaction and subtransactions responsible for the product table, outlet table and the shopping cart. At least part of the product table will be replicated, so there will be a separate process for each replica. Use a synchronised replication protocol. The process will detail the messages sent from process to process and the read-item and write-item for each database access. Other aspects of the process can be briefly described in English. Annotate the process with resource lock/unlock commands corresponding to a twophase locking protocol. Justify your claim that the protocol is two-phase locking in your specific case.

Posted Date: 3/8/2013 5:57:04 AM | Location : United States

Related Discussions:- Distributed query and transaction processing, Assignment Help, Ask Question on Distributed query and transaction processing, Get Answer, Expert's Help, Distributed query and transaction processing Discussions

Write discussion on Distributed query and transaction processing
Your posts are moderated
Related Questions
Determine the method of Choosing Algorithms In general, most of operations are easy and have a satisfactory algorithm since description of what is to be done also shows how i

Isolation or Independence : The isolation property shows that the updates of a transaction should not be visible till they are committed. Isolation assurance that the progresses of

what is lossless & dependency preserving decomposition ?

What is OLAP? OnLine Analytical Processing (OLAP) is a Business Intelligence (BI) reporting system. OLAP gives the user with the capability to sum, count, average and do other

State about the Tables- DBMS Data is stored in columns and rows (much like a spreadsheet -main difference is how data is organised). Every row in a table is known as a record

What are the ways of obtaining the connection parameters?  Hardwire the parameters into the program. Ask for the parameters interactively. Get the parameters

Explain the term- Query. Queries are used to repossess and show specific records in a table. They can also be used to show specific fields of specific records, which meet the co

What are axioms? Axioms or rules of inference give a simpler technique for reasoning about

Submission Requirements All answers must be computer generated (including text and diagrams). The hand-in version must include a header page (or with sufficient space)