Hadoop,MapReduce,Key,Points,Re technology Hadoop MapReduce: Key Points to Remember
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In Hadoop architecture, both data and processing are disseminated across numerous servers. Below are some of the key points that one must remember about Hadoop.1.Each and every server present in Hadoop applications offer local storage and computation, which means, when someone runs a query against a huge set of data, each server in this disseminated architecture shall be implementing the query on its local machine in contrast to the local data set. In conclusion, the final set from all this local servers is amalgamated.2.In simple terms, rather than running a query on an individual server, it is fragmented across various servers, and the results are combined. The whole process makes it easier for the results of query to return faster.3.If you are using Hadoop, you do not necessarily require a powerful server. You may just use some less expensive commodity servers as individual notes and perform the task.4.This architecture has a high fault tolerance power, which means if any of the nodes fail in the environment, there wont be any halt and it will still run the database without any error. This is because the architecture takes care of reproducing and allocating the data effectively through various nodes.5.Simple implementation can use just two servers to perform the tasks but one may scale up to several hundreds of servers without putting any additional effort.6.Hadoop MapReduce applications are written on Java; hence it can perform on almost any platform.7.Please keep in mind that this architecture is not a replacement for your RDBMS, hence you will typically use it for unstructured data.8.Originally Google started using distributed computing model on GFS and MapReduce but now Hadoop is a top-level Apache project that has achieved marvelous momentum and popularity in last few years.Apart from the above mentioned, there are several other benefits of Hadoop applications. For example, it is used for web search service, for data mining, for sorting, for machine learning and for various other systems. If you feel that your organization requires this technology, you may search the web to find out more about the architecture and how it can benefit businesses. This architecture can be a great way to manage enterprise tasks, all you have to do is perform in-depth research.
Hadoop,MapReduce,Key,Points,Re