Feeds

Hadoop 2 stampedes onto world's mega compute clusters

'A great success story for the open source methodology'

Top 5 reasons to deploy VMware with Tegile

The Apache Software Foundation has branded the data analytics Hadoop platform with version 2 and sent the Elephant-logoed system stampeding out into the wild.

The second version of the open-source technology comes with a refreshed compute engine via the YARN data processing and service engine, and the addition of high-availability features for the Hadoop File System (HDFS).

Though the HDFS upgrades have been available in some Hadoop distros, such as Cloudera's, for a year, and YARN has been supported by companies such as Pivotal for six months or so, Apache's general-availability (GA) branding for this version should give users of the data muncher 'n cruncher more confidence.

"What the GA release allows users to do is now assume those user-facing APIs and protocols of YARN are now stable and are not going to change until the next major revision of Hadoop, and that makes people more comfortable about building apps and using those APIs," Milind Bhandarkar the chief scientist for VMware-spinoff Pivotal, told The Register.

YARN brings with it big changes in how the compute component of Hadoop (MapReduce) slices and dices and reforms processing tasks, because YARN splits the job tracking component of MapReduce into two distinct parts: the resource manager, and application master.

This makes it easier for data wranglers to run tasks such as MapReduce or Storm side by side, along with data services such as HBase.

"What it lets happen is other workloads that aren't MapReduce can now share resources with MapReduce much more effectively," Hadoop co-creator Doug Cutting told El Reg. "These other systems can now be dynamically sharing resources, and resources can be prioritized."

This approach takes some influence from the Apache project "Mesos" cluster management system, along with Google's secretive Borg and Omega projects, both Cutting and Bhandarkar admitted.

"I would say that the Borg/Omega frameworks are on one hand more low-level framework for resource allocation and resource management," Bhandarkar says. "On the other hand they are still much better at data center wide scale than what YARN can do."

What YARN does for Hadoop is turn it more into a crude platform for running a bevy of data-oriented applications and services, which helps transform the Hadoop system from a glorified data cruncher into a software ecosystem with the traits of a full-fledged data center operating system, Cutting says.

"YARN opens up the distributed processing capabilities of Hadoop to be more customizable and extensible than the original implementation purely focused on MapReduce," James Watters, the head of product at Pivotal's Cloud Foundry divisions, told us.

Another feature to come with Hadoop v2 is HDFS Federation, which lets a single HDFS have multiple namespaces in a cluster. This increases the availability of the system as a whole by isolating different apps from one another, and boosts file system throughput by eliminating the single namenode bottleneck, according to an Apache FAQ.

Cutting foresees a bright future for Hadoop, and is surprised by how far the Elephant has traveled since its birth at Yahoo! in the early-2000s in response to the publication of Google's MapReduce and GFS papers.

"It really is emerging as an operating system for data centers that can support a wide range of applications - that's something I didn't imagine right off," Cutting said. "My confidence in open source as the best way to get technology out and adopted has increased watching this." ®

Beginner's guide to SSL certificates

More from The Register

next story
Ellison: Sparc M7 is Oracle's most important silicon EVER
'Acceleration engines' key to performance, security, Larry says
Oracle SHELLSHOCKER - data titan lists unpatchables
Database kingpin lists 32 products that can't be patched (yet) as GNU fixes second vuln
Lenovo to finish $2.1bn IBM x86 server gobble in October
A lighter snack than expected – but what's a few $100m between friends, eh?
Ello? ello? ello?: Facebook challenger in DDoS KNOCKOUT
Gets back up again after half an hour though
Troll hunter Rackspace turns Rotatable's bizarro patent to stone
News of the Weird: Screen-rotating technology declared unpatentable
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
The next step in data security
With recent increased privacy concerns and computers becoming more powerful, the chance of hackers being able to crack smaller-sized RSA keys increases.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.