All, We are planning to use rman convert to switch platform for a 2 TB 10.2.0.4 database from AIX to OE Linux . This is a datawarehouse database . the datafiles are 8GB- 12GB size . I am looking for some idea over how long it might take to convert a 800GB tablespace . and also if there is any parameters that can be used .btw we are planning to use parallelism set at 16. appreciate any pointers or suggestion Thanks . Kar