Well, it is hardly worthwhile unless you have some extension or innovation to apply. After you dissect the open source of a SOTA SFS, you may find some ways to make it lower latency or higher bandwidth. Perhaps, using cluster-friendly networking like broadcast UDP. You could add in compression, perhaps somewhat like zip subtrees. You could make it a distributed peer file system aggregating a heterogenous ix of disks on all hosts of the cluster, with dynamic mirroring, where extra copies are made if a host disappears, and multiple copies exist for low churn high use files, or hybrid mirrroring, where one side of the mirror is compressed and the other takes the query load. Of course, a year is sufficient, depending on you anf your schedule.