A twitter user had requested this, so here you go: protobuf-2.5.0.tar.gz.
The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage. Rather than rely on hardware to deliver high-availability, the library itself is designed to detect and handle failures at the application layer, so delivering a highly-available service on top of a cluster of computers, each of which may be prone to failures. This post will outline the steps you need to perform, to build Hadoop on the Raspberry Pi 2.
Apache Maven is a software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project’s build, reporting and documentation from a central piece of information. While Maven can be installed via Aptitude, we want to avoid doing that on the Raspberry Pi 2 because it has a dependency on OpenJDK, which we want to avoid. Maven and Oracle JDK 7 (or higher) is a requirement for building Hadoop. This post will outline the steps you need to perform, to install Maven on the Raspberry Pi 2.