If you are taken the backup of Local & central repository in form of database of ATL/XML then no need to take a backup of Batch Jobs, Datastores etc..
If you are creating a new job server then there is no use of DSConfig.txt.
DSConfig.txt: Contains Job Server Information related t particular server (machine).
Only be sure that if you are creating a job server with different name on same server please delete the old machine info from that local repository.
It will not harm any thing but unnecessary you can see in BODS Designer of Management console when you execute the batch job or real time job
Thanks,
Daya
