Jeff/Gavin write:
> Jeff asks:
> > Excuse this somewhat left-field question, but can any of you bilingual
> > (MPE and HPUX) folks out there give me a quick compare/contrast between
> > MPE's transaction manager (XM) and HPUX's Journaled (Veritas) File
> > System?
>
> I'd be interested in this too.  Specifically is it possible to attach an
> ordinary UNIX file to the JFS in the way that an MPE file is attached to

AFAIK, the JFS is like what XM would be if you restricted it to *only*
working for file system data structures (i.e., no user data).

MPE uses XM to protect the file structures, *and* (optionally) user data.
(IMAGE and KSAM/iX and "serial write queue (see fcontrol)" files
are examples of XM protected user data)

I don't believe that JFS provides for user-data coverage.

--
Stan Sieler                                          [log in to unmask]
                                     http://www.allegro.com/sieler.html