River IQ

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Blockchain

  Ashish Kumar Blockchain September 20, 2018

What is Blockchain?Blockchain is a decentralized/distributed database system that acts as an “open ledger” to store and manage transactions. Each record in the database is called a block and contains details such as the transaction timestamp as well as a link to the previous block. This makes it impossible for anyone to alter information about the records retrospectively.It’s a public ledger that records everything in a secure and transparent manner. Unlike banks that facilitate transactions with traditional currencies, the blockchain al...

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Dynamic Allocation in Spark

  Ashish Kumar Spark August 26, 2018

Why spark is faster than MapReduce?Here today I will give you deep dive about Spark Resource Allocation (Static and dynamic allocation of resources).Whenever this question arose, we have come up with below explanation that Spark does in-memory processing of data or it does better or effective utilization of YARN resources than MapReduce.How and when dynamic allocation of resource will give faster and effective utilization of resources.Effective utilization of cluster or yarn memory.What is Executors?Before we start talking about stati...

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