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VSAM Datasets on TAPE

 
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bsng_surru

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Joined: 07 Mar 2005
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PostPosted: Tue Mar 08, 2005 8:30 am    Post subject: VSAM Datasets on TAPE
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can we reside vsam datasets on tape?
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n.sinha

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Joined: 09 Mar 2005
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PostPosted: Wed Mar 09, 2005 1:35 am    Post subject: VSAM datset on Tape.......(No)
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Hi,

We can not create VSAM dataset on tape.
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bsng_surru

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PostPosted: Wed Mar 09, 2005 1:19 pm    Post subject: Re: vsam on tape
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thanks a lot
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srividya.srinivasan

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PostPosted: Wed May 11, 2005 10:41 am    Post subject:
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Hi,


VSAM Datasets can be stored on tape.

They can retrived and also can be accessed from tape sequentially.


Do let em know in case u have any queries on this.


Regards,
Vidya[/b]
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mmwife

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PostPosted: Sun May 15, 2005 8:55 pm    Post subject:
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Hi Vidya,

I think you're wrong. VSAM files are disk oriented files. You can back them up and restore them, but you cannot access them directly from tape as you can with flat file.

Think of what goes on when you access a VSAM file. The indexes can be separate files, as the data cluster is. When you access a record on a VSAM file the index is searched then the data is accessed. Tape is not designed to forward and backward seaching for data as disk is.
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priya

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PostPosted: Sun May 15, 2005 11:29 pm    Post subject: Re: VSAM Datasets on TAPE
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Then what's the necessity to buy Compact Disks for Rs. 100 other than Tape Disks for Rs.20/-.
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mmwife

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PostPosted: Mon May 16, 2005 7:20 am    Post subject:
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What's a "tape disk" ? And can you explain your comment and relate it to my comments?
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