It depends..... are they simply spinning up an AIX or Linux server, installing one DB2 instance and moving all of the different SQL Server dbs to it that are on multiple machines?

Back in 2011 we finished up a project that eliminated our AIX DB2 Data Warehouse and our Mainframe DB2 systems and moved it all to Oracle and a little of it to SQL Server. The justification was to sunset an outdated Mainframe and AIX server and to 'modernize' our data center along with a ton of cost savings. Well, honestly we got an Oracle ExaData server and most of it moved there. If any of you have dealt with Oracle the word inexpensive is never in a conversation. It costed MORE! The one thing it did do though was take us from four different platforms down to two and eliminated the Mainframe of which very few people left here knew anything about it. It also allowed them to eliminate 9 IT positions. Sad because the Mainframe is by far the most reliable and highest up time system we ever have had here.