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What's the use of linear data set in vsam data set

 
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jose.jeyan

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Joined: 28 Jul 2006
Posts: 60
Location: Mumbai

PostPosted: Thu Aug 24, 2006 6:28 pm    Post subject: What's the use of linear data set in vsam data set
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Can anyone tell me wats the use of linear data set in vsam data set and where it is used

since it is not accesed by cics and havent heard using lds anywhere

pls tell me this one in detail.
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ofer71

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Joined: 27 Dec 2005
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PostPosted: Thu Aug 24, 2006 6:42 pm    Post subject:
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You can find some info in the fine manual.

O.
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jose.jeyan

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Joined: 28 Jul 2006
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PostPosted: Thu Aug 24, 2006 7:00 pm    Post subject:
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sorry ofer71

i am not getting much information from that manual can u pls tell me if u know that
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IQofaGerbil

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Joined: 05 May 2006
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Location: Scotland

PostPosted: Thu Aug 24, 2006 8:42 pm    Post subject: Re: What's the use of linear data set in vsam data set
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A linear data set is a VSAM data set with a control interval size of 4096 bytes to 32,768 bytes in increments of 4096 bytes. An LDS has no imbedded control information in its CI, that is, no record definition fields (RDFs) and no control interval definition fields (CIDFs). Therefore, all LDS bytes are data bytes. Logical records must be blocked and deblocked by the application program?but logical records do not exist from the point of view of VSAM.

IDCAMS is used to define a linear data set. An LDS has only a data component. An LDS data set is just a physical sequential VSAM data set comprised of 4 KB blocks, but with a revolutionary buffer technique called data-in-virtual (DIV).

LDS files are special files used by DB2 and IMS database management systems to store special types of data. They are not generally used on their own for storing business data directly.
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