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Why data access is faster in RRDS

 
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sand
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Joined: 20 Nov 2005
Posts: 19

PostPosted: Tue Jan 03, 2006 11:25 pm    Post subject: Why data access is faster in RRDS
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Hi All,
In comparison to ESDS and KSDS why data access is faster in
RRDS?????

Thanks & Regards.
Sand.
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khamarutheen

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Joined: 23 Aug 2005
Posts: 680
Location: NJ

PostPosted: Wed Jan 04, 2006 11:40 am    Post subject: RRDS
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Hi Sand,

When compared to ESDS and KSDS, RRDS is faster since the RRN is alternative reason and in RRDS the entire data set is a string of fixed length slots. Record in an RRDS may be inserted,retrived,updated and deleted both sequentially and randomly. In general RRDS is like a Direct File.
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sand
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Posts: 19

PostPosted: Mon Jun 19, 2006 3:40 am    Post subject: How RRDS files are faster?????
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Hi All,

Suppose ESDS/RRDS/KSDS all 3 files are having same 10 records.
I want to get the 5th record (for KSDS by the key value/for RRDS by the RRN/for ESDS by RBA).Which file will access the 5th record faster & how????????

Thanks
Sand.
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dpkeee

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Joined: 19 Jun 2006
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PostPosted: Mon Jun 19, 2006 7:14 am    Post subject: fetching data with partial key in vsam
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Hi,

I have a vsam file, with key as store po and store name.
I know only the store PO.
So i want to use partial key concept of vsam files to do it. Can any body tell me where can i get the code for this.

Thanks,
dpkeee
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khamarutheen

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Joined: 23 Aug 2005
Posts: 680
Location: NJ

PostPosted: Tue Jun 20, 2006 4:40 pm    Post subject: KSDS & RRDS
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Sand,

Quote:
Which file will access the 5th record faster & how????????


By practical we will be using KSDS & RRDS only. Mostly the familiar one is KSDS with most of the users. SO as per me i think there may be bit difference i dont think there will be much diff in time so when compared to that KSDS will do. The speed of record fetching for 10 rec is not a matter . When we go for millions of records the speed talks. KSDS will do..... icon_smile.gif but i m not sure.
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