There are two objectives for any disk scheduling algorithm:
Minimize the throughput - the average number of requests satisfied per time unit.
Maximize the response time - the average time that a request must wait before it is satisfied
Over the years block scheduling has become more common in schools around the country. The outcome that has come from this is big and different for every school. However the positive changes are there. Schools that have adopted the block schedule came with many benefits, such as relieving stress, providing more in depth learning, as well as improving students performance .…
As it is evident from the related work discussed in the section 2, when small files are stored on HDFS, disk utilization is not a bottleneck. In general, small file problem occurs when memory of NameNode is highly consumed by the metadata and BlockMap of huge numbers of files. NameNode stores file system metadata in main memory and the metadata of one file takes about 250 bytes of memory. For each block by default three replicas are created and its metadata takes about 368 bytes [9]. Let the number of memory bytes that NameNode consumed by itself be denoted as α. Let the number of memory bytes that are consumed by the BlockMap be denoted as β. The size of an HDFS block is denoted as S. Further assume that there are N…
Memory management is an important characteristic of an operating system. Main memory is divided into two parts one for resident programs, and the other for the program currently in use. The user part must be subdivided to accommodate multiple processes (Stallings, 2012). When a few processes are in the memory then much of the time all of the processes will have to wait for input /output and the processor will be idle. According to Stallings (2012),. The requirements that memory management is supposed to satisfy are Relocation, Protection, Sharing, Logical organization, and Physical…
1. It is necessary to plan a file structure so all the data files can be organized and your computer can run at a faster speed.…
A solid-state drive is a drive that uses non-volatile memory as a means of storing and accessing data, similar to computer RAM (SSD, 2014). An advantage the solid-state drive has over other hard drives is no moving parts. This allows the solid-state drive to access information faster, produces no sound, and significantly more reliable than the common hard drive. The first solid-state drive was designed and implemented between the 1970s and 1980s. Throughout the years, the storage capabilities have improved drastically. Sadly, due to the cost per GB of storage, these solid-state drives have not replaced the current hard drive in computers today.…
ECE 585 Project 2 Spring 13 ver1 Simulation of CPU, Cache, Bus, and Memory Datapath…
The right way to measure is using the queuing system to calculate the total time each request will take during the process. We assume that arrivals appear to be perfectly…
The project of Toronto Sun company is to host the Caribana Festival by complete series of activites from the praparation to the implementation, such as , planning, float design, float construction, Entertainment, vounteer management and parade day management.…
Response Times by setting response targets, we strive to resolve your issues as quickly as possible:…
A small debate has always been discussed when talking about block scheduling and traditional class periods. Some people like the longer classes while others prefer the traditional six shorter class periods. Everyone has their own opinions about block scheduling. Block scheduling can be really helpful to high school students in many ways. Although, block scheduling is a longer time spent in one class, it should be mandatory in all high schools rather than traditional class periods.…
World Wide Web, site response time should be kept to 3 seconds or less to ensure user interest…
shows us how to on the program, how to check our syntax and grammars, and…
As administrators and educators have researched ways to use time more productively, major changes have been occurring in high school schedules. Within the context of education reform, one of the attributes of the traditional educational system that has been a focus for systemic change has been the use of time (Trenta & Newman, 2002). In Nichols’ (2005) research, it’s noted that one of the most important concerns expressed in A Nation at Risk report was related to how effectively classroom instruction time was being utilized in America’s schools. Evans, Tokarczyk, Rice & McCray (2002) indicated that this report offered many recommendations for school reform initiatives, including restructuring for more effective use of school time and increased concentration on core academic subjects. According to Lawrence and McPherson (2000), administrators and teachers in America have been criticized regarding the poor use of school time since the 1980’s (p. 178).…
RAID 2 strips the data into bits, which is why RAID 3 (below) is a better implementation as it strips the data into bytes instead.…
RAID (Redundant Array of Independent Disks) uses two or more drives in combination to create a fault-tolerant system that protects against physical hard drive failure and increases hard drive performance (Microsoft, 2011). RAID is used to improve the performance of a computer and the data redundancy can give you an extra layer of security.…