something wrong with muti koji builder

[Robin YB(yang)]

I have a question here.
If I want to run koji in more than one host, how can I setup the configure file kojid.conf
in host other than the host where kojihub runs?
For example, if I setup the topdir in kojid.conf in kojibuilder2's host the same as
kojibuilder1's:

[kojid]
...

; The directory root where work data can be found from the koji hub
topdir=/localdir/koji
...

When kojibuilder2 works, it can not find the correct koji work directory.
Can anyone tell me how to setup kojid.conf ,or give me an example about this?


Best Regards