Load records via stored procedure or ??

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Load records via stored procedure or ??
I am looking for alternatives for a web application issuing 100,000+
inserts at a time into DB2 tables on OS/390. I have suggested that a
stored procedure bound to OS/390 write to a file instead of issuing the
inserts and load that file into DB2 using the load utility. I have
suggested possibly using stored procedure DSNUTILS to invoke the load
utility but not sure yet. Are there any shops out there that have done
this type of implementation and if so how? Did you see a big performance
gain? We are on DB2V7.1 and use WLM enabled environment for the stored
procedures.
Thanks,
Michelle