Understanding the scope of db2trc command in DPF environment

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1. By default, that is to say turning on db2trc without any location-options, the scope is the current host on which the db2trc command is issued, accordingly db2trc is turned on all partitions in the current host.

2. To turn on/off db2trc for all partitions including the partitions on remote host(s), you can use rah:  
^{rah "db2trc on"
rah "db2trc off"}

You can also use location-option '-global' to reach the same goal:
_{db2trc on -global}
Note that option '-global' is deprecated in DB2 Version 9.7 Fix Pack 4 and later fix packs.

3. To turn on/off db2trc for all partitions on the specified host or hosts, you can use the option '-host':
_{db2trc on -host hostname1
db2trc on -host hostname1,hostname2}  

4. To turn on/off db2trc for specified partition or partitions, you can use the option '-member member_number | member_range':
_{db2trc on -member 0}      (turn on db2trc for partition 0)
_{db2trc on -member 0,1,2}  (turn on db2trc for partitions 0,1 and 2)
_{db2trc on -member all}    (turn on db2trc for all partitions defined in db2nodes.cfg.)