Current-Users archive   Re: Memory file systems  On Feb 10,
2010, at 16:40, Simon Burge wrote: Chris Ross wrote:   My basic
question is, why are there both mfs and tmpfs, what are the
pro's and con's of each, and which (if either) is likely to
receive more support/attention in the future?  One area is the
size of the metadata needed to represent a file in memory.  mfs
needs just a directory entry and an inode, whereas tmpfs needs a
couple of different UVM objects.  I don't recall the exact
details, but it was something in the order of 2-3 times more
memory was required by tmpfs for metadata.  This has
implications for any memory file system where need a large
number of files - say a cvs temp directory.  I can dig up some
(oldish) data if you want more info.    This is interesting.
So, in my [casual] use, I guess this could affect two things in
two or more ways.  In the case of a slow, lightly used, small
RAM system, what you mention above sounds like mfs might be
better.  On a higher-powered machine, with mo