Hadoop property precedence

[Shalish VJ]

Hi,
 
 
    Suppose block size set in configuration file at client side is 64MB,
block size set in configuration file at name node side is 128MB and block size 
set in configuration file at datanode side is something else.
Please advice, If the client is writing a file to hdfs,which property would be 
executed.
 
Thanks,
Shalish.