Category: Java

If you have worked with dynamo db, you might be aware that dynamo db offers to features for grouping operations on DB, transactions and batching. In this post

I came across Generic types when I was first learning java in 2013. I put some effort to understand them and started using them. Most the of the

I was searching for SDK to integrate Instagram into one of my apps, could not find any offical SDK. This is kind of bummer to me, considering the

Last time I did something on J2EE was 3 years back, later moved on to nodejs and never had to go back to J2EE. I was much better

When ever a request is made to a data node to read a block, the data node will read the block from disk. If you know that you

We have seen here, that Avro supports three kinds of API (Generic,Specific,reflect). In this blog we will see how to use Reflect API. Reflect API is use full

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

Hadoop has many standard compression codecs available, namely DEFLATE (.deflate) ,gzip (.gz), bzip2 (.bz2) ,LZO (.lzo),LZ4 (.lz4),Snappy (.snappy) . Only bzip2 is splittable , it very important for

In the previous blog we have seen how to convert a text file to Avro data file.In this blog we will see how to run a map reduce

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