Category: Hadoop

Hadoop is a distributed system infrastructure developed by the Apache Foundation. Users can develop distributed programs without understanding the underlying details of distributed. Make full use of the power of clusters for high-speed computing and storage. Hadoop implements a distributed file system (Hadoop Distributed File System), referred to as HDFS. HDFS has the characteristics of high fault tolerance and is designed to be deployed on low-cost hardware; and it provides high throughput (high throughput) to access application data, suitable for those with large data sets (large data sets). set) application. HDFS relaxes the requirements of POSIX and can access data in the file system in the form of streaming access. The core design of the Hadoop framework is: HDFS and MapReduce. HDFS provides storage for massive amounts of data, while MapReduce provides calculations for massive amounts of data.

Java client for Secure HBase

Hi, I am trying to write a java client for secure hbase.
I want to do kinit from the code itself, because I am using the user group information class.
Can anyone point out where I am wrong?

October 12, 2021By Simo Hadoop client, for, HBase, Java, SecureLeave a Comment

First, MapReduce basic principle

1. Basic Overview of MapReduce 1. Definition It is a programming framework for distributed computing programs. The core function is to integrate the business logic code written by the user and the

October 12, 2021By Simo Hadoop basic principle, First, MapReduceLeave a Comment

CouchBase and CouchBase Lite differences? [Before it called TouchDB]

What is Couchbase and what is Couchbase Lite? Is there any difference between the two? How can I create couchbase lite on a mobile device and how can I communicate with the server? Did you happe

October 12, 2021By Simo Hadoop Couchbase, Difference, limitedLeave a Comment

The difference between Hadoop – Reduce Task and Reducer

“The reducer is different from the reduction task. The reducer can run multiple reduction tasks”. Can someone explain this with the following example?

foo.txt: Very good, this is the foo file