Teradata to Hadoop data movement

[#1]

Hi - We are planning to migrate 20 TB of data from Teradata 15 to HDP 2.5.0.

1 - Pls suggest best way to achive this - Teradata connector Vs Sqoop

2 - How to estimate the time it will take to process this data migration in a 100Mbps network speed to Text format and then to ORC.

Any inputs will help a lot.

Thanks, BaniPrasad