[Info-vax] set fil/enter on a dump file

[Paul Sture]

In article <5159b13a$0$9072$815e3792 at news.qwest.net>,
 George Cornelius <cornelius at encompasserve.org> wrote:

> Phillip Helbig---undress to reply wrote:
> >>Be aware that having page, swap, and perhaps dump files on
> >>a boot disk interferes with merges, but I have forgotten
> >>some of the details.  Essentially you get full merges
> >>on the system disk when you might not otherwise expect
> >>them.  You can ignore this, but it does impact
> >>performance when it occurs.  
> > 
> > 
> > I haven't heard of this.
> 
> Well, I don't have experience beyond 7.3-2, but in my
> environments when a node left the cluster I generally
> found it was unable to completely dismount the system
> disk when it had one or more of those files present,
> the result being a system disk a shadow merge.

When I was running an Alpha cluster with 2 servers and 20+ satellites 
all booted from a common system disk this was a regular occurrence.  

Every time we had a network outage (too often) the satellites would 
crash and then reboot.

Each time a satellite booted there would be a message something like 
"Shadow master changed, dump file will be written" and a full merge 
would commence.

The solution was to move the satellite dump files to the workstation 
local disks using the Dump Off System Disk (DOSD) mechanism.

http://h71000.www7.hp.com/doc/73final/6017/6017pro_072.html#003366

I have just dug up an old comp.os.vms from 2001 which I have posted over 
here:

http://www.sture.ch/node/228

-- 
Paul Sture