[Info-vax] VSI VMS V8.4-2L2 availability?
^P
peter.ljungberg.sui at gmail.com
Sun Nov 14 05:26:29 EST 2021
On Saturday, November 13, 2021 at 5:44:06 PM UTC+1, geze... at rlgsc.com wrote:
> On Saturday, November 13, 2021 at 4:49:17 AM UTC-5, Slo wrote:
> > > I'm not sure why you're looking at emulators as long as the XP1000 is working.
> > > If it is what you need, then use it. Sometime down the road you'll be able to
> > > run VMS in a VM instance on x86. That will make things easier.
> > Because the hardware will die eventually, plus it's noisy and bulky.
> >
> > What I do now is compile on the XP1000, then, for the .C or .H file I last
> > modified, I hit just one key from my editor, which does this:
> >
> > $COPY/FTP/ASCII/PASSIVE/LOG {file} 192.168.0.84"username password"::"/dka0/myproj1/src/{file}"
> > 192.168.0.84 is my FreeAXP OpenVMS on my desktop Windows 10.
> > (I don't use DECnet on either box, but the above syntax works beautifully.
> > File attributes are preserved, it just works!)
> >
> > I then may run the (much slower) compile+link on FreeAXP, so my myproj1
> > sources on both boxes are 100% in sync.
> > But even this slow build is just fine, as just a few files are usually touched.
> > Of course, I can edit the sources on the FreeAXP, and then use the above
> > command to FTP over to the XP1000 -- it's perfectly symmetrical.
> >
> > Next steps:
> > 1. Try FreeAXP on my mediocre laptop, so I don't have to be at the desk at all.
> > 2. Try AXPbox
> >
> > After about 15 years of not touching OpenVMS, I'm having fun again.
> Slo,
>
> Not to flog a dead horse, but I have found that emulated instances and VM instances can require different tuning than real hardware. For one, the I/O penalties are different.
>
> If the emulator is running slowly, it can be worthwhile exploring the nature of the bottleneck. Virtual devices, particularly virtual devices backed by the same physical spindle, can experience significant contention issues.
>
> Your mileage (or, more to the point, performance ratio) can, and will often, vary.
>
> - Bob Gezelter, http://www.rlgsc.com
Indeed, this is the case, would it not therefore, be quite interesting to have a real bare metal solution for performance demanding emulated systems?
^P
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