Tag: Java

Kafka is a distributed pub/sub broker which can scale horizontally. Kafka broker is designed to work in clusters , where you will run multiple Kafka brokers on different

If the input avro data file has many fields and we are interested in only few fields, then we can define a new schema with the fewer fields. this

Avro Supports both primitive and complex data types Primitive data types null, boolean, int, long, float, double, string, bytes Complex data types array – ordered collection of objects

We have already seen how to convert a text file to Avro data file using a simple java program. In this blog we will see how to process

Your reading schema doesn’t has to be same as that of the writing schema. You can add new fields or remove the existing fields(projection). If a new field

Avro defines a sort order for the objects. For most of the types it is natural ordering (for example ascending in case of int) . All the types

Avro Data Files are portable across platforms. You can read the Data Files written by java program from a python program. Data Files carry the schema with them.In

Avro DataFiles are binary files that carry the schema with them. They are splittable and  allows seeking to a random position. You can sync with record boundary . You need

The unit tests has to be fast, so the feedback time will be less and encourage developers to run unit tests for every change they make to the

In the previous we have seen how to read a file from HDFS. In this blog we will see how to write a file from local file system