Weekly Classic Computer Trivia Question (20150410)
andy.holt at tesco.net
Fri Apr 10 12:03:10 CDT 2015
> True or False:
> The ZFS file system wastes more space on an average file allocation than
> the ram in a typical PDP-8.
Given a few assumptions:
a) ZFS set up with default block size
b) you mean "typical"
c) On average, half the last block of a file is wasted
d) AFAICT ZFS doesn't use the trick used by some *ix filesystems of packing the data contents for small files into the directory.
(to do so would clash with the reliability focus of ZFS)
A typical PDP8 had 4 or 8K words (thus 6 or 12K bytes)
Very few PDP8s had more than 32K words (48K bytes)
all of which are less than half the size of the default fs blocksize for ZFS.
More information about the cctech