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The Hortonworks Blog

More from Steve Loughran

Hortonworks architects vertically integrate the projects within our Hadoop distribution with YARN and HDFS in order to enable HDP to span workloads from batch, interactive, and real time—across both open source and other data access technologies. In HDP 2.2, we deliver work to vertically integrate Apache Storm, Apache Accumulo and Apache HBase so that all […]

One aspect of community development of Apache Hadoop is the way that everyone working on Hadoop -full time, part time, vendors, users and even some researchers all collaborate together in the open. This developed is based on publicly accessible project tools: Apache Subversion for revision control, Apache Maven for the builds; Jenkins for automating those […]

Apache Hadoop has always been very fussy about Java versions. It’s a big application running across tens of thousands of processes across thousands of machines in a single datacenter. This makes it almost inevitable that any race conditions and deadlock bugs in the code will eventually surface – be it in the Java JVM and […]

One of the great things about working in open source development is working with other experts round the work on big projects – and then having the results of that work in the hands of users within a short period of time. This is why I’m really excited about the Rackspace announcement of their HDP-based […]

In the last Hoya article, we talked about the its Application Architecture. Now let’s talk persistence. A key use case for Hoya is:  support long-lived clusters that can be started and stopped on demand. This lets a user start and stop an HBase cluster when they want, only using CPU and memory resources when they […]

At Hadoop Summit in June, we introduced a little project we’re working on: Hoya: HBase on YARN. Since then the code has been reworked and is now up on Github. It’s still very raw, and requires some local builds of bits of Hadoop and HBase – but it is there for the interested. In this […]

This post is from Steve Loughran, Devaraj Das & Eric Baldeschwieler. In the last few weeks, we have been getting together a prototype, Hoya, running HBase On YARN. This is driven by a few top level use cases that we have been trying to address. Some of them are: Be able to create on-demand HBase […]

A recurrent question on the various Hadoop mailing lists is “why does Hadoop prefer a set of separate disks to the same set managed as a RAID-0 disks array?” It’s about time and snowflakes. JBOD and the Allure of RAID-0 In Hadoop clusters, we recommend treating each disk separately, in a configuration that is known, […]

As part of Big Data Week, Dan Harvey of the London Hadoop User Group organised an afternoon session for the usergroup, which we were glad to sponsor, along with Canonical and Facegroup. I had the pleasure of presenting my view of the current and future status of Apache Hadoop to an audience that ranged from […]