DB2: What's the fast way to drop a big partitioned table? We got a partitioned table with 100000000+ rows, when I drop it it takes 10+ hours and finally failed.

how to speed drop command up ?
You could issue a TRUNCATE against the table. Or detach the partitions and do the same. 

There are also some pointers from DB2 veteran Ember Crooks about deleting data in one of her blog entries. I find her tips and tricks quite helpful.