Chapter 9. Implementation of Near Real-Time Event Processing
In the previous chapter, we introduced many tools that we did not use in the previous use case implementation, including Storm, Spark, and Kafka. This book is focused on HBase usage, so we will not review the installation of all these new tools, and we will assume that they are correctly installed and running on your environment. In addition, because Twitter decommissioned Storm and identified flaws in its design and scalability,1 the examples here are implemented using Flume.
Because the Cloudera QuickStart VM already comes with Flume, Kafka, Spark, Solr, Lily Indexer, and HBase, we used it to develop and test this use case. Because we used only standard applications and APIs, if you are able to install all those tools locally outside of a VM, or if you have any other VM with all those tools available, it should work exactly the same way.
Keep in mind that the more services you are running, the more memory you need. We assigned 12 GB to our virtual machine to run these examples. If you are lacking memory, you can stop some of those services and run the different steps one by one with the services you have running.
Again, we will not discuss each and every implementation detail, but will cover all the required tools and examples to help you understand what is important during this phase.
Before we begin, you’ll need to make sure that all services are running correctly.
If you are using Cloudera Manager, you can check ...