pg_upgrade question

Hi PostgreSQL Admin,

I am trying to find out if there is any step by step instruction to reconcile old data dir and upgraded data dir after using "-link" option to do an upgrade.

I ran this to do an upgrade from 11.5 to 12.1: pg_upgrade -d /hostname/pg/dev115/data -D /hostname/pg/dev121upg/data --link -b /pgdbadevbal800/pg/PostgreSQL-11.5/bin -B /pgdbadevbal800/pg/PostgreSQL-12.1/bin -p 1432 -P 2432 -v

postgresdbad:dev115:pgdbadevbal800:> pwd
/hostname/pg

postgresdbad:dev115:pgdbadevbal800:> du -sh dev121upg
2.3G dev121upg

postgresdbad:dev115:pgdbadevbal800:> du -sh dev115
22G dev115

My goal is to be able to do an in place upgrade from 11.5 to 12.1 using the same data dir "/hostname/pg/dev115/data". Without the "-link" option I need to double up the space usage for the instance. What is the easiest way to accomplish this task?

Thanks so much for your help.

Dan

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