I've upload two videos covering how Spectrum Protect's db, logs and storagepools can benefit from being hosted on Spectrum Scale (GPFS). They are under the Storage page.
The first video is an overview of how this architecture looks. The second video goes into details on how to design and size such a solution.
There are 3 older videos out there on: 1. Using Spectrum Protect to backup data hosted on GPFS; 2. Using HSM to migrate GPFS data to Spectrum Protect; 3. Using Spectrum Protect as a disaster recovery solution for GPFS.