UPDATING GDG genaration file

che · New User Joined: 31 Mar 2005 Posts: 6 Location: Chennai

Problem goes like this

I am reading some data from a table and writing on to a generation of GDG.When write fails i keep track of the count and rewrite records to the same generation using restart logic.

say i have commit count = 10 and write fails in 14 th record.

how do i rewrite failed records as well as update records from 11.

Is it a good practice to do so.Suggestions are welcome.

Thanks in advance for all replies from fellow Forum mates.

withnams · New User Joined: 06 Jul 2005 Posts: 26 Location: Chennai

Its not a good programming practise. The process is to commit after 'n' records and write those 'n' records into the file.
This way you can avoid the issue.

che · New User Joined: 31 Mar 2005 Posts: 6 Location: Chennai

mr.chokalingam,

issue is whatif write fails in between. If u read the problem again u wud
have seen commit count is 10 records.

whatif write fails between 10 and 20.

how do i write data on to the same generation with new fetch of data from the table. without deleting records already written.

nspreddy · New User Joined: 29 Jul 2005 Posts: 1

Pls clear abt this topic

shivashunmugam Muthu · Posted: Fri Jul 29, 2005 3:08 pm

My suggestioin is

1. Create GDG new version with Disp as (Mod,Catlg,Keep)

2. Have 10 LRCL restart file with value as 000000000 & open it in I-O mode & update the counter (Commit-write) in the periodic interval.

3. Make the pgm to read restartfile, if its zero start process from 1. Else jus read infile till read count > commit count

Hope it shd works...

Correct me if I am wrong.