SMP And MPP Databases Analysis

SMP And MPP Databases Analysis It has by now become a compulsion to implement Data Warehouses and Decision Support systems in almost all the major organizations. Almost every form of organization is investing heavily in building Warehouses across the multiple functions they implement. Data Warehouses, with their large volumes of integrated, consistent and conformed data, provide the competitive edge by enabling business establishments to analyze past and current trends, monitor current patterns and shortcomings and make informed future decisions. The size of the average Data Warehouse is growing exponentially with each year with organizations looking increasingly to gather every bit of information possible into the warehouse. Modern day ETL tools provide excellent support to integrate from varying and disparate sources like Mainframes, Relational databases, XML files, unstructured documents like PDFs, emails and web pages. It is not just the size of the Data Warehouse that is increasing, but also the utility and the functionality that is expected out of it, that is seeing a multi fold increase. A large number of advanced and high performance Business Intelligence applications Reporting, Dashboards, Scorecards, Data Mining and Predictive modeling are now executed over the Data Warehouse and these applications execute highly complex queries accessing large volumes of data. These requirements the ever growing size of the Data Warehouse and the increasing complexity of the queries executed against it has necessitated the need to look for alternate architectures and implementations of relational databases that can scale up effectively to support efficient querying across large volumes of data with shorter response time and consequently raised the debate of going MPP (Massively Parallel Processing) enabled databases over SMP (Symmetrical multi processors) structured data bases. II. SMP (Symmetrical multiprocessor) Symmetrical multiprocessor systems are single systems containing multiple processors (2 64, or even higher) in which a common pool of memory and disk I/O resources are shared equally. These systems are controlled by a centralized operating system. Sharing of system resources by the processors enables them to be managed more effectively. Very high speed interconnections are deployed across the SMP systems to allow effective interconnection and equal sharing of memory and resources. Apart from high bandwidth, low communication latency is another important property that SMP systems should possess to demonstrate high levels of scalability. This is necessitated by often employed operations in data warehouse such as index lookups and joins that involve communication of small data packets. If the amount of data present in each message is less, then the importance of low latencies is paramount. In SMP , multiple cpus share the same memory, board, I/O and operating system. Each and every CPU acts independently. When one CPU handles a database lookup, other CPUs can perform database updation and perform other tasks. As a result, the device will be able to handle the highly complex networking tasks of todays world in a very easy way. Thus SMP systems too involve a degree of parallelism in that multiple processors can be used to perform mutually exclusive operations in parallel. SMP are relatively cheaper when compared to MPP databases. The cost of upgrading is also lesser because as we scale the number of processors, only an additional processor board needs to be added. Processing power can thus easily and seamlessly be increased by adding extra processors. However SMP have the limitation that they can only scale so far. As all cpus on the same board share a single memory bus, there is a chance of bottlenecks to occur. This bottleneck impacts performance and slows down processing. Instead of placing too many number of CPUs on the same SMP board, designers of high-end network elements can distribute applications across a networked cluster of SMP boards. Each board has its own memory array, I/O and operating system. However this approach begins to complicate the up gradation. Network -specific codes has to be added by network managers to applications. Also as drivers are tightly bound to kernel, moving them involve creation of a new kernel image for each board. III. MPP (Massively parallel processor) Massively parallel systems are composed of many nodes. Each node is a separate computer having a minimum of one cpu and also has its own memory which is local to it. There is a connection also for connecting all the nodes. These type of systems have separate ALUs that runs in parallel fashion. Various standards like MPI are used by nodes for communication. Message passing mechanism is used by nodes for communication. Each node in a massively parallel processor system is accessed with the help of an interconnect technique. The technique supports transfer of data which is at the rate of 13 to 38 MB/sec. Every node in the system contains CPU, disk subsystems and memory. These nodes are self sufficient nodes. The system can be considered as a shared nothing system. Shared nothing indicates that the nodes have their own memory, OS and I/O subsystems, nothing is shared. These systems are designed to have good scalability. Also these systems allow the addition of any number of processors to the system. In cases where partitioning of problems are possible, MPP systems exhibit good performance. In that case there will be no communication among nodes and all the nodes work in parallel fashion. But this partitioning occurs only in rare situations and therefore the performance that MPP systems promises to exhibit is reduced. Such partitioning occurs in the case of ad-hoc queries that are typical to datawarehouses. Also the high scalability that MPP systems offer is limited by data skew or when communication between nodes in the system is highly needed. Single node failure reduces not only the power required for processing but also makes the data located at that node inaccessible. In industries, single-processor nodes which are termed as thin are augmented with multiprocessor nodes which are termed as fat with the help of many processors in SMP configuration. In such cases, the MPP nodes will have many number of processors and less number of nodes. The architecture of MPP includes a group of independent nodes which are of shared-nothing type. Each node has cpu, local disks and memory. Message based interconnect connects all these together. IV. DEPLOYING DATA WAREHOUSE Now that we have discussed in brief the inherent differences between an SMP and an MPP, the below section details the considerations that have to be taken into account while deploying a Data Warehouse. The main consideration when deploying data warehouses are that they should be able to extract meaningful and un-obvious, information from large amounts of data . They can use techniques such as relational intra-query parallelization, on-line analytical processing (OLAP), data mining, and multidimensional databases for the extraction. To perform these analyses, systems that are powerful require access to many times the amount of data that is stored in any one of a companys operational systems. Organizations deploy data warehouses by transferring data periodically from on-line transaction processing (OLTP) databases into data warehouses. These are implemented at fixed schedules via ETL routines that execute at pre-defined intervals in a day. The ETL routines could also execute weekly/monthly and quarterly for sources that provide information at that frequency. Since the databases used in data warehouses are different from the operational OLTP source systems, the ETL from the source systems to the Data warehouse can be a resource-intensive operation involving data extraction, data cleansing and conforming of the data. The amount of storage needed is staggering as well with the entire operations of the company integrated within the Data warehouse sales, orders, operations, finance etc . As the usefulness of this data is not predictable in the beginning, all of the companys data is usually stored in a data warehouse . Data warehouses pose a constant challenge of rapid deployment of application. In the case of OLTP systems the workload is predictable and can be managed with careful tuning. While in the case of data warehouses, they constantly changes whenever new applications are created. Because of their constantly-changing nature, all data warehouses require custom configuration. Factors to consider when deploying data warehouse 1) Complexity of Query: Query complexity ranges from canned queries that are simple to data mining using techniques in artificial intelligence. Canned queries make use of optimized, pre-compiled SQL which may be used in answering questions which are simple and are repeated frequently. Complex data analysis is done using ad-hoc queries which are written in SQL. Also those queries that support operations in data mining are very much complicated . Such queries are not written in SQL and they are difficult to optimize also. Intensive methods like neural nets, genetic programs etc are used by these queries. 2) Workload in Database: Workloads of decision support systems varies from interactive operation to batch operation. Data visualization packages uses access to data warehouse that are interactive. Such packages extract data trends with the help of executing pre-compiled queries. 3) System Architecture: DSS makes use of the technology, parallel processing. Parallel computing architectures range varies in the extent to which memory is hierarchical. Memory is accessed uniformly by symmetric multiprocessors with the help of high-speed buses or crossbar switching technologies. These technologies support point-to point interconnection between processors. Groups of SMP systems are used by clustered approaches. These are linked with interconnection mechanisms which are of slower speed. MPP systems use nodes containing local memory that are accessed through a local high-speed bus. Communication among nodes are carried out through message-based interconnects which are of lower speed. VI. NEED FOR SCALABLE DATA WAREHOUSES The size of a Data warehouse grows rapidly in size and the growth cannot easily be accurately anticipated. Data warehouse implementations often start small and grow as the volume of data and the demands increase. Data warehouses are often deployed with a few processors in the beginning, and can support many times the initial processing capability. Properties When more number of processors are added to an SMP, or nodes are added to an MPP, it is important that system should scale. Ideally, a Data Warehouse system should exhibit two properties to show good levels of scalability speed-up and scale-up. 1) Speed-up: It is the property demonstrated, in which if a job needs one time unit to complete with one processor then it will need 1/N of the time to complete with N processors. For example, consider a job that needs five hours to complete with one processor , it needs only one hour to complete with five processors. Then we say that the system scales well. 2) Scale-up: It is another important property. Consider a system with excellent scale-up. It provides the same level of performance even if the data warehouse size increases through the addition of processors or nodes. For example, when the database size is one terabyte , a batch job that takes five hours to run will take the same time of five hours when the size is two terabytes. In order to maintain scalability, the data should be re re-partitioned across the nodes. This is a time consuming and risky process as databases are terabyte-sized . This step is not required on an SMP. Database administrators valuate scalability by checking whether the systems behavior is predictable when workload intensity increases. If the systems behavior is predictable even when the workload grows, then the system scales well. VIII. CONCLUSIONS Both SMP and MPP server databases can be used for Data warehouse implementations. There are different situations where each can be utilized. The general trade-off point on choosing between the two depends on several factors: 1.) Volume of data expected to be stored in the database. 2.) Expected number of concurrent users. 3.) Complexity of queries to be executed number of joins, aggregations etc to be used. 4.) Average volume of data accessed by each query. 5.) Anticipated growth volumes. When the number of concurrent users is less, and when the volumes are low, SMP are preferred. In fact SMP are preferred for more OLTP like environments. In contrast when the volumes are large, and the number of queries executed is large and involves complex query processing MPP server databases are preferred. These databases on account of their parallel processing capabilities can be utilized to execute complex queries more efficiently and hence offer a natural choice for typical Data warehouse implementations.

Critical Analysis of Martin Luther King, Jr.s Speech -- Papers Have D

Critical Analysis of Martin Luther King, Jr.'s Speech Introduction In this critical analysis I am going to look at Martin Luther King, Jr and the 'I have a dream' speech. Martin Luther King, Jr is very distinguished due to the many outstanding achievements he accomplished throughout his life. He was an American clergyman and he accomplished the Nobel Prize for one of the principal leaders of the American civil rights movement. King's defiance to segregation and racial discrimination in the 1950's and 1960's helped persuade many white Americans to support the cause of civil rights in the United States. Following his assassination in 1968, King became a representation of protest in the struggle for racial justice. ====================================================================== Martin Luther King, Jr, History ------------------------------- Martin Luther King was born in Atlanta, Georgia, and he was the eldest son of Martin Luther King, Sr., who was a Baptist minister. His father enlisted as a pastor of a large Atlanta church, Ebenezer Baptists, which was founded by Martin Luther Kings, Jr's maternal grandfather. King attended a segregated school, where he excelled. He then entered Morehouse College at the age of 15 and graduated with a bachelor's degree in sociology in 1948. He went on to graduate, with honours, from Crozer Theological Seminary in 1951 and enrolled in Boston University where he achieved a doctoral degree in systematic theology, in 1955. Throughout his education, King was exposed to influences that associated Christian theology to the struggles of oppressed people. At Boston University,... ...', this is putting across the idea that God wants everyone to be, even blacks, and Gods wishes should be fulfilled. My opinion I found this speech very moving and very forceful with it meaning. It has shown me how many people had to fight to get the society we live in today and to achieve the racially equal society we live in. This speech influenced my protest and control song immensely because I used his ideas of everyone being the same underneath to write my lyrics. I tired to use similar techniques in my lyrics as King did in his speech, for example, repetition. Conclusion Martin Luther King fought hard for the world we live, which some people take for granted, although there is still some racial discrimination today I feel that his teachings will go on and live with me for the rest of my life.

Hitler Research Paper

Brianna Milligan Mr. McCaw AP Lit and Comp 9 November 2012 On April 20th 1889, Adolf Hitler was born. Adolf is debatably the most remembered dictator in all of history; he was responsible for the genocide of 6 million Jews, and other minorities. Why Hitler developed a strong angst against the Jews is unclear, although there are many theories, none prove to be factual. Perhaps it was this influential man’s huge desire for power that drove him to such drastic measures. Despite, Hitler’s unforgivable actions – rejection, war, and power are the three elements that created Adolf Hitler, the face of Nazi Germany.As a young German boy, Adolf loved art so much so, that all he sometimes did was sketch and paint. He was particularly gifted with academics; he passed his classes with great ease and found school to be fairly unchallenging. Despite his academic abilities, he stopped caring and trying in school as he grew older. The reason for this would be Alois’ death (Hitler’s father) when Adolf was only 13. However, it was Hitler’s biggest aspiration to be accepted into Vienna Academy of Art, but after submitting his application several times Hitler was rejected.Prior to his father’s death, Hitler and Alois had their differences due to Alois’ opinion on the pointlessness of art school. Adolf was abused by his father for many years, and it is arguable that this rejection from his own father built up unhealthy steam. After being rejected by the Academy of Art, he lived in Vienna pretending to be an art student to avoid telling his mother, Klara, the truth. In 1907, his mother passed away of cancer, and this was probably the most traumatic thing in Hitler’s youth. â€Å"Her death affected him far more deeply than the death of his father.He had fond memories of his mother, carried her photograph wherever he went and, it is claimed, had it in his hand when he died in 1945. † (Spartacus Educational) He could never face his mother, in fear of being rejected by her as well. The First World War was surfacing and Hitler had ignored his call-up papers for enlisting in the Austrian Army. Shortly after being taken in by the authorities for a medical examination for the army, â€Å"he was rejected as being: â€Å"Unfit for combatant and auxiliary duty – too weak. Unable to bear arms. (Spartacus Educational) Acceptance in the psychological development of a teenager is crucial, and Hitler was repeatedly rejected. World War I was in full action, and Hitler joined the German Army. Most soldiers look back on violent wars and talk about the brutality and struggles, but Hitler wrote, â€Å"I was overcome with impetuous enthusiasm, and falling on my knees, wholeheartedly thanked Heaven that I had been granted the happiness to live at this time. † (Mein Kampf) Hitler found this to be his â€Å"greatest spiritual experience† (Mein Kampf) and from then on found himself becoming obse ssed with the military.He volunteered for the job of ‘dispatch-runner’ which required him to run across the front-line and relay messages from regimental headquarters. Being on the front lines were extremely dangerous considering only one out of three messengers lived. Adolf Hitler won five medals including the honorable â€Å"Iron Cross. † This was one of his first successors, and WWI had become his favorite point in his life. It was until October 1918, when Hitler breathed in some British Mustard Gas and was blinded. This resulted in Hitler having to stay in the hospital until he recovered.While he was in the hospital, Germany signed the Treaty of Versailles and had surrendered. The few peers and colleagues of Hitler stated that he had slipped into a deep depression once he’d caught wind of the news, and this was just another failure that Adolf had associated himself with. Post-war Hitler had been shocked that a socialist revolution had occurred, and as a dedicated German Nationalist he was infuriated with these social equality movements. He believed that communism was evil and that these Socialist party revolutions were nothing but â€Å"Jewish Conspiracies† (YouTube: Adolf Hitler the Greatest Story Never Told).Eventually, Hitler was recruited as a German political officer, and could now lecture soldiers on politics. Germany was in a state of economic downfall because of the Treaty of Versailles. All of the war reparations were to be a paid for by Germany because they had originally started the war, Hitler was deeply involved with politics and loved war. Therefore he was agitated by the fact that the Treaty was having Germany pay for everything and he rendered that it was an unfair treaty.Hitler, at this time, was a common public speaker, and not too long after all these speeches he created his own political party. â€Å"In February 1920, the National Socialist German Workers Party (NSDAP) published its first programme whi ch became known as the â€Å"25 Points†. In the programme the party refused to accept the terms of the Versailles Treaty and called for the reunification of all German people. To reinforce their ideas on nationalism, equal rights were only to be given to German citizens. â€Å"Foreigners† and â€Å"aliens† would be denied these rights. (Spartacus Educational) This is when Hitler’s evident hatred of the Jews became visible to all of Germany, but his speaking was so influential and it made sense at the time that people didn’t disagree. His party was the biggest favored political party during this period. Hitler’s newfound party became known as the ‘Nazi Party. ’ â€Å"According to Hitler, Jews were responsible for everything he did not like, including modern art, pornography and prostitution. Hitler also alleged that the Jews had been responsible for losing the First World War.Hitler also claimed that Jews, who were only about 1% of the population, were slowly taking over the country. They were doing this by controlling the largest political party in Germany, the German Social Democrat Party, many of the leading companies and several of the country's newspapers. The fact that Jews had achieved prominent positions in a democratic society was, according to Hitler, an argument against democracy: â€Å"a hundred blockheads do not equal one man in wisdom. † (YouTube: Adolf Hitler the Greatest Story Never Told).It wasn’t long before Hitler ran for president, won, and became a dictator. He now had complete and total power, and had already begun deportation plans for the Jewish people in Germany. Hitler let the German people know right away that the Jewish were the reason they lost the war, he read Henry Ford’s book The International Jew, and stemmed a passionate hatred toward the very existence of the Jewish race. It wasn’t until autumn of 1941 that Hitler openly spoke about the annihil ation of the Jews, but he wasted no time in preparing the concentrations camps which was ultimately his ‘final solution. (adolfhitler. dk. ) Adolf Hitler controlled everything in Germany during the holocaust, every horror imaginable was going on in these concentration camps, and Germany’s strategies in WWII were extremely violent. The mass murder of the Jewish population was called the Holocaust. Hitler took over many territories all over the world during WWII, and his army was incredibly disciplined and brutal. Conclusively, the Holocaust was a result of the creation of the Nazi Party.Hitler was rejected by society, became obsessed with war, and his complete control of Germany with his ultimate power led to the genocide of 6 million Jews. Works Cited: â€Å"Adolf Hitler. † Adolf Hitler. N. p. , n. d. Web. 13 Nov. 2012. ;http://www. adolfhitler. dk/;. â€Å"Spartacus Educational. † Spartacus Educational. N. p. , n. d. Web. 13 Nov. 2012. ;http://www. sparta cus. schoolnet. co. uk/GERhitler. htm;. YouTube. Dir. Deephiddentruth. YouTube. YouTube, 23 Mar. 2012. Web. 13 Nov. 2012. ;http://www. youtube. com/watch? v=TERKermWgIg;.

Prenatal Alcohol Exposure And Ability, Academic...

In the study titled Prenatal Alcohol Exposure and Ability, Academic Achievement, and School Functioning in Adolescence: A Longitudinal Follow- Up, there is a study conducted in order to show the correlation of academic problems to prenatal alcohol exposure, in which some of the children in the study had fetal alcohol syndrome and others did not. The main theory is that â€Å"Prenatal exposure to alcohol is associated with fetal alcohol syndrome (FAS) as well as other alcohol- related neurodevelopmental disorders (ARND) that are expressed as developmental, disabilities, behavior, and learning problems (Stratton, Howe, Battaglia, (1996).† The authors’ theory was based on a survey issued by Barr, Kogan, and Bookstein (1996). The survey was issued to 441 clients which revealed that 60% of those patients who were 12 years or older, had either been expelled, suspended or dropped out. This common finding among them were called disrupted school experiences. After evaluating the surveys, authors saw a correlation between academic problems and disruptions in school experiences. 70% seemed to have attention problems, 40% received special education services, and 65% were reported to have received some kind of remedial help in reading and mathematics when in school. The research by Barr, Kogan, and Bookstein (1996) helped them form the hypothesis that â€Å"those affected by prenatal exposure would show decreased intellectual abilities, have special learning deficiencies in math with a relativeShow MoreRelatedFetal Alcohol Syndrome And Its Effects1712 Words   |  7 Pages Fetal Alcohol Syndrome and its Effects On a Child’s Cognitive Development Dane D. Hrencher Kansas State University Fetal Alcohol Syndrome and its Effects On a Child’s Cognitive Development Alcohol is known as one the most dangerous teratogens. Every time a pregnant woman drinks, she allows alcohol to enter her blood stream and make its way into the placenta. 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