Free Oracle text unload utility (ociuldr) was used to extract Oracle data from OLTP system and then load them into their OLAP system by alibaba company (Taobao). They get a really fast unload speed these days.
0 rows exported at 2007-11-28 06:00:04
153163818 rows exported at 2007-11-28 06:19:14
Totally 1140 seconds for 153163818 rows, 134354 rows per second, the table size is 79GB, 69MB per second. This is really a fast record. Due to powerful machine, and well tuned SQL, and well tuned ociuldr parameters.
Another company (Tencent/QQ), did not get this speed when unloading.
Update: Alibaba doubled the unload speed by running ociuldr at database server side.
0 rows exported at 2007-11-28 15:43:09
171135273 rows exported at 2007-11-28 15:53:04
How robust their database host is!