Hi
The dfdss accepting haply the OPT(4) keyword, the copy time dropped from
10 minutes to abut 7 minutes.
The "real" copy will go from ESCON channels to FICON .
We have to do this only once, as "BusTech" gave up the support for zDASD .
Thank you
On 07.03.2013 12:37, David Devine wrote:
Hi Miklos,
I'm making the assumption that your are referring to dfdss.
The traditional way of speeding up dfdss (adrdssu) copy's (or dumps) is by
using the OPT keyword.
I believe the default is (3) which is 5 tracks read at at time.
OPT(1) 1 track OPT(2) 2 tracks OPT(3) 5 tracks and OPT(4) 15 tracks read at at
time.
If you are doing a full volume copy i expect your sysin should look something
like this:-
COPY FULL ALLX ALLDATA(*) IDY(TS0002) ODY(XX12C0) -
COPYVOLID PURGE OPT(4)
or you may use INDD OUTDD for your volume selection
Other criteria to consider, region size on your jobcard or pgm; number of
available channels; whether you want to copy your disks when in use or not.
Using a product like softek's tdmf will allow for in flight disk copys.
If you don't ahve it, then dfdss should only be used for packs when not in use.
With dfdss you need to cater for the volume ids on the source & target volumes, so you may want to
add steps to "clip" (ickdsf reformat) the source volume before the dfdss copy and
"clip" the target volume to the original source name after the copy.
This will keep it isolated and stop inadvertant access to the original source
volume.
Good luck!
Dave
***********************************************************************************************
Hi
We need to copy a large number of DASD volumes (from zDASD to DS6800).
Any option to speed up?
Seems CONCURRENT is not supported by the zDASD.
Kind regards, / Mit freundlichen Grüßen
Miklos Szigetvari
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Kind regards, / Mit freundlichen Grüßen
Miklos Szigetvari
Research& Development
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