What are some large file storage solutions?

GlusterFS will work, using the NFS API, but we have had difficulties with the performance in other use cases. There are other NFS API solutions that should work at 20 TB, such as NetApp or EMC.

When it comes to S3, it is important to note that Artifactory supports the S3 API which is supported by a number of vendors in addition to Amazon. An example of another vendor would be CephFS or OpenStack or VMWare.