The difference between openstack and Hadoop
Openstack is an open source cloud computing framework, while Hadoop is an open source big data framework, the two focus on different.
Difference:
Cloud computing provides storage and computing resources on the cloud platform.
Big data, based on Hadoop, provides a distributed storage (HDFS) and computing model (Map/Reduce). You can use multiple computers to build a Hadoop platform, or you can build a Hadoop platform on a computer through a virtual machine, or even a Hadoop platform on a cloud platform.
