Thank you for the clarification, Steve. I am not sure it would be wise to install a SPRE Foundation with its own requirements (I/O, CPU) alongside a CAS Controller which would compete for the CAS (licensed) CPU, for instance but I am no specialist in this regard. Either , I think It wouln't be any wiser to expose the SASWORK filesystem over some NFS shared filesystem, surely, as R&D (Cf. Maragaret CREVAR team storage recommendations ) has repeatedly told us. This leaves us on Linux with few options left. Why would the loading through JSON/RestFUL be so inefficient, could you please elaborate - maybe in a future post ? I consulted this post (https://communities.sas.com/t5/SAS-Communities-Library/SAS-Viya-CAS-REST-API-How-to-fetch-a-table/ta-p/600023) which displays the capability to leverage the Viya RestFul API , and SAS 9.4 M4+ comes with a JSON translator (Cf. https://blogs.sas.com/content/sasdummy/2016/12/02/json-libname-engine-sas/ ) which looks very handy too.

All the best
Ronan