[Info-vax] MicroVAX/VMS newbie, couple of questions

[Jordi Guillaumes i Pons]

En/na John E. Malmberg ha escrit:
> 
> 
> Is there anyway to do the compile on an RF72?
> 
> If you are using a KZQSA, it is limited to about 1 MB/sec throughput, 
> although disk caching may compensate for that.
> 
> A third party Q-BUS SCSI adapter can run at about 3.5 MB/sec throughput.
> 
> I assume that the RF72s are on the internal DSSI bus as that is a bit 
> faster than a KFQSA DSSI bus.

That's correct. But the actual compilation work was done on an user SCSI 
disk which is in an external storage bay, plugged to one QZQSA on the 
4000-200.

> Which also means that on a 100 Mbps Eithernet link, an emulated VMS 
> system should be able serve files at close to 5 MB/sec, which is faster 
> than the speed of IDE drives on a DS10/DS10L, which conveniently has a 
> second ethernet adapter that can be dedicated to accessing the cluster 
> storage.

Quite sure. I remember when I actually _worked_ whith VAXen (System 
managent and developing... we where an small DEC island surviving on a 
mainframe IBM workd...). We used VAXstations (3100-M30, IIRC) which 
BOOTED from a Microvax II and used its system disks in a LAVC 
environment... on 10MBs thinwire ethernet! And we didn'nt complain about 
speed, when we used the local disks just for paging and we had all the 
devlopment files, CDD repositories, VAXSet stuff and so on living on the 
MicroVAX-II and accessing via classic ethernet...

Of course, at the side of that machine there was a 8250 which did the 
real "production" work, plus All-in-One and Teamdata for the users. We 
bought it with 8MB of memory, and had to pay a little fortune for a 4MB 
upgrade to a wooping ammount o 12MB to support the increase of users 
when we deployed AI1...

Those where the times...