Databases

Nelson Mandela once said, “Education is the most powerful weapon which you can use to change the world.” However, in Woody Allen’s, “The Rejection,” the writer satirizes the ideals of the education system that acknowledges only the intelligent students. This is seen in the character of Boris through his exaggerated reaction towards the failure of his son. During the time of Woody Allen, he believed that education was only for the smart and intelligent people. Woody Allen satirizes the education…

Concurrency loss due to IO path critical sections (IPCS) Time lost in waiting queue (WT) to enter a critical section affects an application concurrency (AC), and impedes the application performance from scaling (AC ∝ 1 / WT) if a workload is bursty and highly parallelized. It is apparent that the wait time to enter a critical section is a function of the CS’s size (CSS) and the number of waiting threads (NWT) i.e. WT ∝ CSS * NWT. Furthermore, the work done (IO completed) is proportional to the…

We’ve used a lot of devices and storages so far in our life, but one thing that might be weird to people is the RAID. RAID stand for redundant array of independent disks and is a place for people to store their information. It is stored on CDs, instead of the normal flash drives and hard drives. RAIDS are different from the normal CDs, because they have to divide the data and spread the blocks into several megabytes for RAID to work. This is to make RAID efficient and fast. There are lots of…

foster care system can be extremely overwhelmed with the thought of becoming independent, or with taking the necessary actions to become a responsible adult in the near future. The National Youth in Transition Database documented the outcomes of youth aged 17 through 21 years old. The NYTD database uses the data to compare and understand the experience of receiving care and after transitioning to a successfully independent individual (ACF, 2014). There were 6 outcomes that were considered when…

Centralized Database or Database Replication: A Business Case There are numerous considerations when implementing either a centralized database or multiple replicated databases. These considerations include the question of whether the return-on-investment outweighs the upfront and future cost of the solution, what risks are associated with each solution and whether those risks are acceptable to the business, and what impact either solution would have on performance and productivity. By…

This review used three databases to search for the PICO question. The three databases used were Speechbite, PubMed, and CINAHL. These three sources were recommended to use by a librarian at Hardin Library for Health Sciences. Speechbite was chosen since it strictly made for speech and language interventions. PubMed has around 5000 articles relating to many specialties in the medical field. Similarly to PubMed, CINAHL has around 3000 journals for nurses and other professions in the medical…

responsibilities include physical design, installs, security, backups, and requirements of the database. 7. The trade-offs for concurrency controls are: a. If it’s too strict it can lead to locking the entire database. b. Other measures have low level of concurrency control. 8. Atomic transaction ensures that all the actions on the database are done or none of them are done at all. If none of them are done then the database remains unchanged. It’s important because if ensures that important…

Step 9 monitors the database application systems and improves performance by making amendments to the design as appropriate. 16.2 What factors can be used to measure efficiency? There are a number of factors that we may use to measure efficiency: • Transaction throughput:…

Assignment Instructions: When a detection algorithm determines that a deadlock exists, the system must recover from the deadlock. The most common solution is to roll back one or more transactions to break the deadlock. List the three actions that need to be taken using figure 16.18 to discuss. (Silberschatz, Korth, & Sudarshan, 2001, p.618) A deadlock occurs when a sequence of transactions is waiting for access to data that is being held by a lock in another transaction in the same cycling…

The differences in SQL and Relational Algebra are not that many. In fact, they are pretty much the same thing. Both of them have commands that need to be evaluated in order to get a result or a new table. In the SQL, we have commands that need to be followed step by step. For example, the first thing we need to know if we need to join tables. After that, we need to know what columns or fields we are putting as a result, then what table or tables are those columns coming from, and last if there…