Backup datasets

rarvins · New User Joined: 24 Jan 2007 Posts: 59 Location: Texas

Hi,

I have a lot of datasets having similar high level qualifiers that need to be migrated. example....ABCD.T1.T2 I have to issue HMIGRATE command to all the datasets that start with these qualifiers....Is there a way that I can automate this thru REXX rather than bringing up all of them in 3.4 and issuing the command manually?

Thanks

Pedro · Posted: Wed Jul 09, 2008 9:59 pm

From a rexx program, you can use the LMDINIT and LMDLIST services of ISPF to get the list of names.

Use LMDINIT to specify your dataset HLQ, including wildcard

Use LMDLIST to get the dataset names. Issue your HMIGRATE commands for each name.

enrico-sorichetti · Posted: Wed Jul 09, 2008 10:22 pm

backup or migrate ????

the subject says backup, but the text talks about migrate,
please take a decision...
is it a recurrent task or just once in a while execution ?

rarvins · New User Joined: 24 Jan 2007 Posts: 59 Location: Texas

I need to archive the datasets to by issuing HMIGRATE command and it is a recurring activity. But the activity will not be a scheduled process. It will be triggered manually when required

Pedro · Posted: Sun Jul 13, 2008 7:02 am

If it is a recurring activity, you probablly want to use HBACK instead of HMIGRATE.

HBACK takes a snapshot of the original dataset, but leaves the original where it was. So maybe you can have several generations (depends on HSM options). HMIGRATE moves the original dataset from DASD to HSM storage. If you try to HMIGRATE again, it will say 'already migrated'.

Pedro · Posted: Sun Jul 13, 2008 7:14 am

Did you know that HSM automatically creates occasional backups of updated datasets and automatically migrates infrequently used datasets? It can also take full volume dumps of DASD. Perhaps your efforts are not needed.

kranthikumarb · Posted: Tue Jan 06, 2009 11:03 am

Hi,
when we issue a HBACK command, what will be the name of the dataset that is backed up. In my case, I gave the command HBACK, made some changes to the original dataset, now i dont want these changes and i want to get my original version. How do i get that version again? Can you please help.

Also please explain how is HBACK different from 3.3 copy?

Thanks

expat · Posted: Tue Jan 06, 2009 12:30 pm

To know the number of backup versions retained by HSM you must speak to your storage people, as this is site specific information.

If the limit is one, then you can not do what you want to do, and should maybe look at DFdss as a backup vehicle.