Beginning at 02:00 on Thurs. morning, the DB is planning on being on strike through Sunday until early Monday. This includes all passenger trains, S-bahns and freight trains. U-bahns, buses and trams will be running. They will be full and probably run late if this strike is like the last one as every one tries to take alternative routes to work.
If you are expecting to take a train sometime during these 4 days, they probably will not be running, though the DB said they hoped to have every 3rd train run. Yeah, right. Tell that to those who have planned vacations using the trains.
http://www.thelocal.de/20141104/german-train-drivers-to-strike-for-four-days-gdl
Long distance buses are going to be your friend.