Alexander Schreiber wrote:
  Thre _have_ been people who suggested putting the
journal on a ramdisk
 for blazingly fast I/O ... and ISTR that back in the days, one could buy
 extension cards for SUNs that carried some battery backed RAM for a
 similiar purpose (intended for reliably write caching NFS I/O). 
Not just Sun.  Those Prestoserve cards were available for a variety of
architectures.  I have a few for DEC PMAX, at least one for IBM RS/6000,
and I had heard they were available for HP/9000 machines.
Peace...  Sridhar