[Info-vax] SCP2 and large files

[Phillip Helbig undress to reply]

In article <rh21lt$195r$1 at gioia.aioe.org>, Jeremy Begg
<jeremy at vsm.com.au> writes: 

> > Why not do ZIP/VMS/LEVEL=9 on the saveset?
> 
> Because it takes too long.
> 
> This backup job initially used BACKUP/DATA=COMPRESS but the time 
> required to compress the savesets meant the daily backup job was taking 
> over a day to run!
> 
> I know BACKUP/DATA=COMPRESS uses Zlib not Info-ZIP but I would be very 
> surprised if one turned out to be twice as fast as the other. 

Give it a try.  Of course, don't try to compress something which is 
already compressed.

> I'm also 
> not sure that it would yield a useful improvement in the file size.

Depends on what the data are.  Experiment with /LEVEL to get the 
trade-off between speed and size you need.