How to configure Map/Reduce so that my Map function runs parallely?

In your script deployment, set the concurrency limit higher than 1

Thanks

Though, keep in mind that you are only setting an upper allowed limit. Netsuite will determine how many queues to assign to the Map phase.

I am trying to write the push below array as value for reduce stage i am not able the get values in reduce stage, when i retrieve context.values; i am facing an error unexpected u or unexpected L var x = [{"CUSID":"31","TN":"CUSTINVC204","AMT":"321.58","DD":"","TD":"1/14/2019","TT":"Invoice","DISC_AMT":"","ALT_NAME":null,"PAR_CUS":"000001 GOODYEAR EDI CUSTOMER ONLY"},{"CUSID":"31","TN":"CUSTINVC216","AMT":"233.68","DD":"","TD":"1/15/2019","TT":"Invoice","DISC_AMT":"","ALT_NAME":null,"PAR_CUS":"000001 GOODYEAR EDI CUSTOMER ONLY"},{"CUSID":"31","TN":"CUSTINVC222","AMT":"100.00","DD":"","TD":"1/15/2019","TT":"Invoice","DISC_AMT":"","ALT_NAME":null,"PAR_CUS":"000001 GOODYEAR EDI CUSTOMER ONLY"},{"CUSID":"31","TN":"CUSTINVC223","AMT":"100.00","DD":"","TD":"1/15/2019","TT":"Invoice","DISC_AMT":"","ALT_NAME":null,"PAR_CUS":"000001 GOODYEAR EDI CUSTOMER ONLY"}]

I'd probably need a little more context. Are you writing array x from your Map phase, to be processed in the Reduce phase? Or is x the array you are receiving in the Reduce phase's context.values ?

while using JSON.parse i am facing an issue Unexpected u or Unexpected L @scottvonduhn

I'd need to see the code for the reduce phase where it's doing the JSON.parse