IBM Mainframe Forum Index
 
Log In
 
IBM Mainframe Forum Index Mainframe: Search IBM Mainframe Forum: FAQ Register
 

Why DB2 is supporting only LDS and not any other


IBM Mainframe Forums -> DB2
Post new topic   Reply to topic
View previous topic :: View next topic  
Author Message
usha.ushaa

New User


Joined: 12 Dec 2006
Posts: 2
Location: Trivandrum

PostPosted: Mon Jun 04, 2007 4:00 pm
Reply with quote

Can anyone explain why DB2 is supporting only LDS and not any other
VSAM datasets.
Thanks in Advance,
Usha
Back to top
View user's profile Send private message
usha.ushaa

New User


Joined: 12 Dec 2006
Posts: 2
Location: Trivandrum

PostPosted: Mon Jun 04, 2007 4:03 pm
Reply with quote

Actually tablespace is an LDS and an index is also an LDS . How these
two are correlated(for eg: if I delete a table the index is also deleted)
how this happens?
Back to top
View user's profile Send private message
dick scherrer

Moderator Emeritus


Joined: 23 Nov 2006
Posts: 19245
Location: Inside the Matrix

PostPosted: Mon Jun 04, 2007 10:18 pm
Reply with quote

Hello,

What you are asking about is the IBM design of DB2. These are not something dba/programmer/etc people have any control over.

There is no good reason for these - it is just they way db2 was implemented.

DB2 is designed to only work on "tables" and the other types ov files are not db2 tables. . .

If this is not what you wanted, please let us know.
Back to top
View user's profile Send private message
Craq Giegerich

Senior Member


Joined: 19 May 2007
Posts: 1512
Location: Virginia, USA

PostPosted: Mon Jun 04, 2007 11:43 pm
Reply with quote

If you don't like the way DB2 operates you can always write your own version.
Back to top
View user's profile Send private message
pavchau1

New User


Joined: 05 Jul 2019
Posts: 3
Location: india

PostPosted: Wed Jul 17, 2019 10:39 pm
Reply with quote

Hi Dick Scherrer,

Yeah I understand Db2 is designed in such way so it uses only LDS, but back in old days, Db2 used ESDS and now LDS is standard, so my question is what is the reason so Db2 switched to LDS from ESDS. LDS has any benefit over ESDS or something else?


Thanks,
Pavan Chauhan
Back to top
View user's profile Send private message
dneufarth

Active User


Joined: 27 Apr 2005
Posts: 319
Location: Inside the SPEW (Cincinnati OH USA)

PostPosted: Wed Jul 17, 2019 11:15 pm
Reply with quote

I believe Mr Scherrer passed away.
Back to top
View user's profile Send private message
pavchau1

New User


Joined: 05 Jul 2019
Posts: 3
Location: india

PostPosted: Wed Jul 17, 2019 11:38 pm
Reply with quote

i am sorry
Back to top
View user's profile Send private message
pavchau1

New User


Joined: 05 Jul 2019
Posts: 3
Location: india

PostPosted: Wed Jul 17, 2019 11:39 pm
Reply with quote

anyone else can answer my question?
Back to top
View user's profile Send private message
Robert Sample

Global Moderator


Joined: 06 Jun 2008
Posts: 8569
Location: Dubuque, Iowa, USA

PostPosted: Wed Jul 17, 2019 11:42 pm
Reply with quote

Yes, Mr. Scherrer passed away about 5 years ago.

IBM does not provide any rationales for why they do things, but I would guess the byte-oriented nature of LDS and its lack of record structure compared to ESDS may have something to do with why they switched. However, unless you work for IBM's DB2 group it is EXTREMELY unlikely that you will ever find out the precise reasons for the change.
Back to top
View user's profile Send private message
Rohit Umarjikar

Global Moderator


Joined: 21 Sep 2010
Posts: 2569
Location: NYC,USA

PostPosted: Thu Jul 18, 2019 5:58 pm
Reply with quote

Pavan, Btw it’s DB2 and not Db2 unless yours belongs to IbM.

www.redbooks.ibm.com/redpapers/pdfs/redp4187.pdf
Back to top
View user's profile Send private message
John Poulakos

Active User


Joined: 13 Jun 2012
Posts: 180
Location: United States

PostPosted: Thu Jul 18, 2019 9:47 pm
Reply with quote

ESDS datasets are extremely unstable and don't follow standards dictated by the Access Control Block architecture.
Back to top
View user's profile Send private message
vasanthz

Global Moderator


Joined: 28 Aug 2007
Posts: 1689
Location: Tiruppur, India

PostPosted: Fri Jul 19, 2019 1:41 am
Reply with quote

Quote:
Pavan, Btw it’s DB2 and not Db2 unless yours belongs to IbM.


It is Db2 not DB2 anymore. IBM rebranded a lot of stuff - www-01.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/7/899/ENUSLP18-0047/index.html&request_locale=en

Db2 is correct.
Back to top
View user's profile Send private message
Rohit Umarjikar

Global Moderator


Joined: 21 Sep 2010
Posts: 2569
Location: NYC,USA

PostPosted: Sat Jul 20, 2019 4:13 am
Reply with quote

No more old school philosophy, that’s great to know thanks
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic View Bookmarks
All times are GMT + 6 Hours
Forum Index -> DB2

 


Similar Topics
Topic Forum Replies
No new posts Syncsort version supporting FINDREP c... SYNCSORT 9
Search our Forums:

Back to Top