Actually the biggest problem is actual either Full Posix or Mutable Storage. If there is just one way in and never a way out, it's actually way easier. So pract

Actually the biggest problem is actual either Full Posix or Mutable Storage. If there is just one way in and never a way out, it's actually way easier. So practically if you don't run your database on shared storage etc and manage it "the old way". you could have something reliable by a 'never delete'. However CAS and immutable file systems aren't that common.