Hortonworks is the only 100-percent open source software provider to develop, distribute and support an Apache Hadoop platform explicitly architected, built and tested for enterprise-grade deployments. Developed by the original architects, builders and operators of Hadoop, Hortonworks stewards the core and delivers the critical services required by the enterprise to reliably and effectively run Hadoop at scale. Our distribution, Hortonworks Data Platform, provides an open and stable foundation for enterprises and a growing ecosystem to build and deploy big data solutions. Hortonworks also provides unmatched technical support, training and certification programs. For more information and to try it out at no cost, download the Hortonworks Sandbox at www.hortonworks.com/sandbox.
Azul’s Zing® runtime for Java is certified with Hortonworks, and the only JVM that supports highly consistent and pauseless execution of HDFS and HBase solutions regardless of user load or memory allocation. Zing also supports real-time use cases for Apache Spark™ not achievable with other JVMs, and supports large in-memory indices for Apache Solr™ without performance penalties.
Read this Hadoop namenode performance white paper on medium.com.