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Allocating datasets through TSO ALLOC command

 
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phanirajasekhar

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Joined: 03 Jun 2005
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Location: Chennai

PostPosted: Thu Jun 09, 2005 9:32 am    Post subject: Allocating datasets through TSO ALLOC command
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Hi

From a REXX program which is Getting a MultiVolume Dataset as input and after processing while allocating a new dataset do we need to create a multivolume dataset again using UCOUNT() option for ALLOC command
or MVS it self will allocate the dataset to multiple volumes if the allocated space not available in single Volume.


thanks
raj
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MGIndaco

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Joined: 10 Mar 2005
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Location: Milan, Italy

PostPosted: Fri Jun 10, 2005 8:31 pm    Post subject:
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I tried to copy with rexx a dataset on multi-volume to another dataset and new volumes are automatically added from sms.
In my opinion, it's very expensive and wrong use Rexx to allocate big dataset on multi-volume without compiling it.
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phanirajasekhar

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PostPosted: Tue Jun 14, 2005 11:57 am    Post subject: Re: Allocating datasets through TSO ALLOC command
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actually in the issue we trying to fix is deals with multivolume files only.

according to my understanding , even if any multivolume files comes in as input ,it doen't mean that i too need to create the multivolume file.

but i am not sure what happens if the allocated space is not available in
in a single volume will MVS takecare by it self or we need to create the multivolume file programatically

hope i explained my doubt clearly.
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MGIndaco

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PostPosted: Tue Jun 14, 2005 7:19 pm    Post subject:
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Depend on the setting of the segment in the name of your dataset.
If you talk with your Storage Admin I'm sure that he can aswer to your request. I.e. if you want to allocate a dataset on multivolume, the second, third and other volume added are part of your personal storage group so, if you try to allocate a dataset through rexx or other: MYUSERID.BIG.BANG the storage class is automatically defined for it.
There is a segment MYUSERID.%% that allow you to allocate in all the set of disk of your storage class.
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MGIndaco

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Location: Milan, Italy

PostPosted: Tue Jun 14, 2005 8:21 pm    Post subject:
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I hope that this link will be useful:
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/handheld/Connected/BOOKS/IKJ4C550/1.7?DT=20040721160158
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phanirajasekhar

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Joined: 03 Jun 2005
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Location: Chennai

PostPosted: Wed Jun 15, 2005 10:55 am    Post subject:
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hi

i tried to copy a dataset which is multivolume to a normal dataset which i have created from my rexx program. after completion of copy the destination dataset also became multivolume as the size required is huge.
so , i guess i need not worry about the creation of multivolume dataset from the rexx program.

thanks
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