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What are the Type of Datasets

 
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jeevajeeva

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Joined: 13 May 2006
Posts: 17

PostPosted: Tue May 16, 2006 2:56 pm    Post subject: What are the Type of Datasets
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hi,

can anyone give me a clear Idea about datasets and the types of the same.

regards,
jeeva
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Vijaya Baskar

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Joined: 18 May 2006
Posts: 8
Location: Chennai

PostPosted: Mon May 29, 2006 9:47 am    Post subject:
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Hi,

MVS Datasets can be broadly classified into Physical Sequential (PS) datasets, Partitioned Datasets (PDS) and VSAM Datasets. A Physical Sequential datasets can be compared to files, where the data is stored as records. The data can be a source code or application data. PDS can be compared to a folder, which has different members that contain data. Here again, each member can have a source code or application data as records.These are the only ones that can be allocated using ISPF/PDF.
VSAM datasets are special access method datasets that contain business application data. These datasets can be created to contain entry sequenced or key sequenced data as required by the application. These datasets are maintained by VSAM (Virtual Storage Access Method) and cannot be directly accessed from MVS. IDCAMS utility is used to work with these datasets.

Hope this information will give you an insight into Datasets.
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prasanth_thavva

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Joined: 28 Jul 2005
Posts: 86
Location: Chennai

PostPosted: Mon May 29, 2006 7:54 pm    Post subject: is there any speciality of using vsam rather sequential
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hi vijay,

what is advantage that vsam have over physical sequential file.

which one is more faster processing capable ?

thanks & regards,
venkata prasanth
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dneufarth

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Joined: 27 Apr 2005
Posts: 252
Location: Cincinnati OH USA

PostPosted: Tue May 30, 2006 12:06 am    Post subject:
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and if tou want more detail try

http://publib.boulder.ibm.com/cgi-bin/bookmgr/FRAMESET/dgt2d410/1.1?SHELF=dgt2bk13&DT=20020122112221&CASE=
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