Throttle replication speed in case of datanode failure

[Brennon Church]

Hello,

Is there a way to throttle the speed at which under-replicated blocks 
are copied across a cluster?  Either limiting the bandwidth or the 
number of blocks per time period would work.

I'm currently running Hadoop v1.0.1.  I think the 
dfs.namenode.replication.work.multiplier.per.iteration option would do 
the trick, but that is in v1.1.0 and higher.

Thanks.

--Brennon