Red Hat is an American software company that is producing open-source software products for the enterprise community. One of their main visions is to have a hybrid cloud computing environment that allows companies to run their applications in an environment that spans private and public resources. They announced the development of their Red Hat Storage Hadoop plugin that should be available through Apache this year.
There are two specific differences between this and Hadoop distributed file system. One, there is no NameNode and two, they combined the storage and virtualization technology. It is able to get rid of the NameNode because it is fully distributed. The reason Red Hat did this is because the NameNode is the bottleneck of the system and most frequently the single point of failure. The advantage of the combined storage and virtualization technology is the virtual pool storage that can also compute resources that in the same physical infrastructure.
Some advantages of the Red Hat Hadoop plugin are the geo replication, high availability, POSIX compatibility and data locality.
Resources
http://gigaom.com/2013/02/20/red-hat-open-sources-its-take-on-hadoop-storage/
http://www.redhat.com/about/mediarelations/factsheet.html
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