Access Control Layer On Top Of Pig Using Xacml

1366 words - 5 pages

Apache Hadoop is an open-source software framework for storage and large scale
processing of data-sets on clusters of commodity hardware. Hadoop, an Apache top-level project
is built and used by a global community of contributors and users. Rather than relying on
hardware to deliver high-availability, the library is designed to detect and handle failures at the
application layer itself. It delivers a highly-available service on top of a cluster of computers,
each of which may be prone to failures.
A small Hadoop cluster has a single master and multiple worker nodes. The master
node consists of a JobTracker, TaskTracker, NameNode and DataNode. A slave or worker
node acts as both a DataNode and TaskTracker, though it is possible to have data-only
worker nodes and compute-only worker nodes. These are normally used only in nonstandard
applications. Hadoop requires Java Runtime Environment (JRE) 1.6 or higher. The standard
start-up and shutdown scripts require ssh to be set up between nodes in the cluster.
The Apache Hadoop framework is composed of the modules Hadoop Common which
contains libraries and utilities for other Hadoop modules, Hadoop MapReduce is a
programming model for large scale data processing, Hadoop Distributed File System (HDFS)
is a distributed file-system which stores data that provides very high aggregate bandwidth
across the cluster and Hadoop YARN, a resource-management platform that manages
computer resources in clusters and uses them for scheduling of user applications.
The Hadoop distributed file system is a distributed, scalable, and portable file-system
written in Java for the Hadoop framework. Each node in a Hadoop instance has a single
namenode; a cluster of datanodes form the HDFS cluster as shown in Figure 4.2. Each node
does not require a datanode to be present. Each datanode serves up blocks of data over the
network using a block protocol which is specific to HDFS. The file system
uses
the
TCP/IP layer for communication. Clients use RPC for communicating between each other.
HDFS stores large files (in the range of gigabytes to terabytes) on multiple machines. It does
not require RAID storage because it achieves reliability by replicating the data on multiple
hosts. Data is stored on three nodes: two on the same rack, and one on a different rack with
the default replicating value 3. Data nodes can talk to each other to rebalance data, to move
copies around, and to keep the replication of data high.
Hadoop MapReduce is software framework for writing applications which processes
large datasets in parallel on large clusters. It splits input data into independent chunks and
then these chunks are processed by the map task parallely. Outputs of map are sorted and
becomes input for the reduce tasks. Both input and output are stored in a file-system.
written in Java for the Hadoop framework. Each node in a Hadoop instance has a single
namenode; a cluster of datanodes form the HDFS cluster as shown in Figure 4.2. Each node
does...

Find Another Essay On Access Control Layer on Top of Pig Using XACML

The Loopholes of the Montreal Protocol on the Substances that Depletes the Ozone Layer

919 words - 4 pages them cannot stand the heat and they died. While under the sea, many fishes have also been extinct because the coral reefs have been destroyed in the process called coral bleaching. Lastly, a common evidence of global warming is the failure of cultivated crops. Many lands have dried up and have fissures because there is no water left especially on the season of El Niño which lead to hunger and increase in demand of food. The Ozone Layer is a

The Worst Day of My Life...With Sprinkles on Top

597 words - 2 pages The Worst Day of My Life...With Sprinkles on TopEven though it is the correct texture, believe me when I say that caramel sauce makes a terrible hair gel! The time I spent working at my uncle's ice cream stand was the worst six hours of my life. If I had had any idea how work would effect my sanity, I would have kept my mouth shut and never asked for a carWorking part-time to pay half the car's cost, and letting my parents cover the remainder

The New State House on Top of Beacon Hill

1143 words - 5 pages Denzel Paige May 8, 2014 HAA 11 A Link in Time Massachusetts is one of the original thirteen colonies that comprised the United States in the late 18th century. In 1798 the “new” State House was built across the Boston Common on the top of Beacon Hill (cite 1). The historical significance of the building is evident in that it was constructed on land owned by Massachusetts’ first elected governor, John Hancock. Also, the person that designed

The Effect of Socioeconomic Status on Limited Access to Healthcare

1117 words - 4 pages What is the effect of socioeconomic status on limited access to healthcare? Socioeconomic status can limit access to healthcare in many ways. Several Americans do not have the means to receive healthcare although it is readily available to the entire population. A person’s social status, urban community and financial background can all have an impact as to how access to healthcare is achieved. While there are many factors that limit

Theory on Control of Assets

3658 words - 15 pages helps the organization achieve their objectives by bringing in and using a systematic, disciplined approach which he can use to evaluate and improve the effectiveness of risk management, control, safe-guarding of assets and governance processes. He would pick up on mistakes and weaknesses within the business and approve on them by designing or fixing them with a new and updated system. He will implement this to ensure the organization a much more

Investigating the Implementation of Magnetic Access Control Card Security System within the Swaziland College of Technology Community

1428 words - 6 pages Technology (SCOT) is one of the higher learning institutions in Swaziland. Ever since the college was established, it is using campus security personnel and padlock keys to control access to main areas and buildings. 2. Problem Statement Access to the campus is through the campus gates where there are campus security personnel. There are entrances to the college which are not guarded by security personnel. There is no proper barrier around the

Investigating the Implementation of Magnetic Access Control Card System Security within the Swaziland College of Technology Community

2815 words - 12 pages et al., 2009). Magnetic card access control security has gained recognition as one of the secure methods of protecting areas and building in the recent years. People and organizations have transformed from physical locks and keys to magnetic cards to secure their premises using magnetic card access control security systems. Access control has also risen to be a measure concern for businesses, organizations, education centres to secure data

Ozone layer Depletion and the future effects it will have on the population. Harmful effects of the Ultraviolet rays

844 words - 3 pages The ozone layer diminishes more each year. As the area of polar ozone depletion (commonly called the ozone hole) gets larger, additional ultraviolet rays are allowed to pass through. These rays cause cancer, cataracts, and lowered immunity to diseases.1 What causes the depletion of the ozone layer? In 1970, Crutzen first showed that nitrogen oxides produced by decaying nitrous oxide from soil-borne microbes react catalytically with ozone

EFFECTS OF LOCUS OF CONTROL ON GENDER

2024 words - 8 pages score. Data Analysis. For statistical analysis, t-test (Independent and Paired sample t-test) was applied by using statistical package for social sciences (SPSS) (Table 2). 3. Discussion. The study did not support the finding of [1] who argued that the effect of the locus of control on gender was not consistent. However, this proves an effect of the locus of control on gender differences. The present study did not support the findings of [3] who

Essay on Control in Song of Solomon

1036 words - 4 pages Fight for Control in Song of Solomon     The idea of complete independence and indifference to the surrounding world, symbolized by flying, stands as a prominent concept throughout Toni Morrison's novel Song of Solomon. However, the main character Milkman feels that this freedom lies beyond his reach; he cannot escape the demands of his family and feel fulfilled at the same time. As Milkman's best friend Guitar says through the novel

On the Emulation of Congestion Control

690 words - 3 pages evolutionary programming [26]. It is always a natural ambition but is supported by related work in the field. The rest of this paper is organized as fol- lows. To start off with, we motivate the need for the memory bus [7, 15, 22, 23]. To ad- dress this issue, we concentrate our efforts on disconfirming that rasterization can be made “smart”, symbiotic, and ambimorphic. Ulti- mately, we conclude. 2 Large-Scale Symme- tries In this section, we

Similar Essays

The Dynamism Of Access Control Essay

2999 words - 12 pages access rather than just anchoring the security of resources on the access control devices. This is a motivation of this paper. Trust is an important issue in access control, considering that the access control mechanism will be handled by a personnel which could change his mind in performing opposite of the legitimate role and function he or she supposed to do. However, there are few papers that discussed about this issue of trust, knowing fully

Musketeers Of Pig Alley As A Historical Source On Gangsters

1049 words - 5 pages discussion on the inherent challenges and opportunities, which prevail when using film as a historical tool. Gangsters are integral parts of history and have emerged as iconic figures of the industrial twentieth century and represent a culture of mobility, urban space, access and individual life. The gangster is also regarded as an anti-social figure as he is the focus for liberation from hierarchy and the past that society and ideology wish to

Growth Of, Control Of, And Access To The Internet

4299 words - 17 pages United States. This software has been mandated by the government to be used in specific circumstances. Practical types of control rely on current limitations to the person. The technology required for access is made unavailable or unaffordable, allowing some countries to control their citizens in that manner.The Internet can be seen as a technological, social, political, and economic infrastructure that will try to break the holds of control that

Shedding The Light On The Network, Transport And Application Layer Protocols Of Osi Model

2406 words - 10 pages switches. Accordingly, data can be transmitted from one network device to another [5]. Data-Link Layer It ensures getting the data packaged from the physical layer. This layer handles the physical transfer, farming (data assembling into a single unit), flow control and error-control over a single transmission link [4]. Network Layer This layer establishes the route between the sending and receiving stations. It handles the routing of data on