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Pradeep Thangapandy
New User
Joined: 22 Feb 2008
Posts: 12
Location: United Kingdom
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| When i try to read huge file having millions of records i could not do it using EXECIO command. Is there any approach for reading large files in REXX? |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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Yes, using EXECIO - but you need to process the file in sections.
There is an example on the forum that I posted some time ago. |
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ofer71
Global Moderator
Joined: 27 Dec 2005
Posts: 2358
Location: Israel
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Here's a rule-of-thumb for you: Reading large datasets in REXX is a bad idea. Not only the storage is exhausted, the process consumes a lot of CPU.
O. |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
FWIW - there is always a better way to process large files than to use rexx/execio. . .
Keep in mind that things that are bad performers originally will only get worse as volume increases (and it usually does). |
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