[ot][spam][crazy] log 2: append-only random writes

[Undiscussed Horrific Abuse, One Victim of Many]

class Flush:
    def __init__(self, parent = None):
        self.parent = parent
        if self.parent is not None:
            self.index = [self.parent]
        else:
            self.index = []
    def write(self,
      # index updating can happen all inside write method