IIRC, the most recent and most technical public content we (Google) have published on Colossus are these: https://cloud.google.com/blog/products/storage-data-t

IIRC, the most recent and most technical public content we (Google) have published on Colossus are these: https://cloud.google.com/blog/products/storage-data-transfer/a-peek-behind-colossus-googles-file-system https://cloud.google.com/blog/products/storage-data-transfer... https://cloud.google.com/blog/products/storage-data-transfer/how-colossus-optimizes-data-placement-for-performance https://cloud.google.com/blog/products/storage-data-transfer... Facebook's published content on Tectonic is quite good and I think it's well more recent than 2010-14. (Current Google employee, just pointing to public content, hope that's helpful.)