[Info-vax] SCP2 and large files

[Jeremy Begg]

On 13/8/20 02:13, Phillip Helbig (undress to reply) wrote:
> In article <rh03ak$121p$1 at gioia.aioe.org>, Jeremy Begg
> <jeremy at vsm.com.au> writes:
> 
>> I think where it's going wrong is step 2.  The stat() on the 500GB
>> saveset takes a very long time (seems to be about 90 minutes), by which
>> time the Linux end has given up waiting for the transfer to begin.
> 
> 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. I'm also 
not sure that it would yield a useful improvement in the file size.

	Jeremy