offsite in your case is remote DD or really offsite like tape volume which later on moved away from premisses?

it is a remote DD sir.

if using via GUI, what do you mean by PRE-COMP REMAINING?what does the value mean?

If using application aware replication (via DD Boost), nothing - it is all handled automatically.  If not, you need to create replication context and initiate it (can be done via GUI).

no..im just asking because currently running mtree replication.

ranstorm wrote: if using via GUI, what do you mean by PRE-COMP REMAINING?what does the value mean?

? Where did I say that?

filesys show compression

[...]

Key:                                                         

       Pre-Comp = Data written before compression            

       Post-Comp = Storage used after compression            

       Global-Comp Factor = Pre-Comp / (Size after de-dupe)  

       Local-Comp Factor = (Size after de-dupe) / Post-Comp  

       Total-Comp Factor = Pre-Comp / Post-Comp              

       Reduction % = ((Pre-Comp - Post-Comp) / Pre-Comp) * 100

do you have any idea what would be the best bandwidth speed in terms of data domain replication?

ahh okay..thank you so much.

Not sure what best bandwidth means - the fastest?  Replication speed depends on couple of things like how busy DD is and how much data there is, how small and unique data is and so on. Bandwidth is usually sized based also on multiple inputs and EMC has nice tool for sizing.  You can ask your EMC contact for that and they will collect data and get you figures.