Migrating jobs from COBOL Mainframe system to UNIX system


 
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# 8  
Old 12-28-2019
The current system is a Mainframe IBM with Z/Os operating system with data/Jobs in cobol while the target system is an IBM system with Unix operating system on it and data/jobs in Oracle.
@vbe, was your port 1 to 1 through an FTP? How convenient can it be converting data from cobol to Oracle?
@jgt, making a common dataset for jobs in cobol to Oracle is the piece. Is it all about massaging data to the target system?
# 9  
Old 12-28-2019
The most difficult is not the conversion, once you know what is going on you can figure out how long it will take, its more if you are talking of production, negociating the downtime, the time to transfer the last state of all the data then converting and validating the lot, you can leave the system in readonly and lock the system for update but having people accessing will impact transfer time etc...
cobol / Oracle under unix means you are not using a transaction monitor, lots of chances you lets that to Oracle... So its more what/how good is the design of the new database, are you DBA sure of their table structures... I would say an indexed file = table ( easy...) but do you have I dont know the term in English, in french it was "fichier relatif", that could give you some headaches...
# 10  
Old 12-28-2019
Oh, for the system, ask how many concurrent users you had accessing the apps on the mainframe, be sure to have enough pseudottys, on the Unix, then remember the users once connected may well be always the same user under Unix under Oracle, so look at the params like nfile nproc per user limits and ajust them as needed my machine crashed the second day of production because i didnt know how many users... ( run out of TTYs ) good job I knew how to calculate in hexa and use mknod....
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