Euclidean vs Manhattan Distance

Euclidean Distance: In order to calculate the distance b/w tow points in a given Space – can be a N-dimensional, we can use Euclidean distance formula: D(x1,x2) = SQRT((x1-x2)**2 + (y1-y2)**2) where SQRT is Square Root D stands for distance b/w point x1,x2. we can extend this for N- dimensional plan as follows D(x1,x2,x3,…xn) =Continue reading “Euclidean vs Manhattan Distance”

Briefly define transparency, fault tolerance, scalability, and naming. Discuss these concepts in the context of HDFS architecture and how some of them you think change in the cluster-oriented architecture.

Transparency: The term Transparency in distributed systems implies that the end user should not face any difficulty when accessing the remote files, the same way as local files. The user should be able to access the files from any system along as the system is part of distributed system. The client/user is not bothered ofContinue reading “Briefly define transparency, fault tolerance, scalability, and naming. Discuss these concepts in the context of HDFS architecture and how some of them you think change in the cluster-oriented architecture.”

NO SQL Databases

MongoDB: This is one of the NoSQL DB. It’s a NoSQL solution. This is also called as Document Database. Basic architecture is as follows: MongoDB will have multiple databases; Each Database will have multiple Collections; Each collections will have set of documents. This is where data will be stored in case of MongoDB MongoDB storesContinue reading “NO SQL Databases”