Elastic Storage is the product formerly known as GPFS. <a href="http://www-03.ibm.com/systems/technicalcomputing/platformcomputing/products/gpfs/" rel="nofollow">http://www-03.ibm.com/systems/technicalcomputing/platformcom...</a>
Me, I prefer Lustre over GPFS; Lustre is open source as well, and used by 70% of Top100<p>Here's a related presso from KIT:<p><a href="https://www.scc.kit.edu/scc/docs/Lustre/pfs_scc-sem_20111005.pdf" rel="nofollow">https://www.scc.kit.edu/scc/docs/Lustre/pfs_scc-sem_20111005...</a>
So IBM sells <i>UIMA</i> with <i>Lucene</i> on top of <i>GPFS</i> and calls it <i>Software Defined Storage</i>.<p>* UIMA (Unstructured Information Management Architecture): <a href="http://en.wikipedia.org/wiki/Unstructured_Information_Management_Architecture" rel="nofollow">http://en.wikipedia.org/wiki/Unstructured_Information_Manage...</a><p>* Lucene: <a href="http://en.wikipedia.org/wiki/Lucene" rel="nofollow">http://en.wikipedia.org/wiki/Lucene</a><p>* GPFS: <a href="http://en.wikipedia.org/wiki/GPFS" rel="nofollow">http://en.wikipedia.org/wiki/GPFS</a><p>Edit: GPFS instead of Hadoop