I do not know of any database system on the market (now or ever) that is guaranteed to function fully and correctly on a remote filesystem. Unless there is something of which I am not aware, every DBMS only guarantees that it will operate fully and correctly correctly when operating against a "local" filesystem (note that the "filesystem" is local, but that does not mean that the "cord" between the "local computer on which the filesystem is running" and the "underlying block storage device" might not be 10's, 100's, 1000's or million of miles long). Note that there is a difference between a "remote client" (as in client/server) and a remote "filesystem". They are not interchangeable no matter how much you might wish they were.