About nas_replicate -i output

Does anybody know the meaning or relations below numbers when issueing  nas_replicate -i output?

Average Transfer Rate (KB/s)

Average Read Rate (KB/s) 

Average Write Rate (KB/s) 

I found doc explain each category but still not sure what this really means ..

The read rate is for total read rate for source FS for the session ? is there any document

stating this kind of infor ?

I have issued cmd from source/ target and resulted that above numbers are same on both side .

Souence

nasadmin@NX4-CS0 ~]$ nas_replicate -i -all

ID                             = 156_SL7E9102300057_0000_161_CK200043300733_0000

Name                           = riso_rep

Source Status                  = OK

Network Status                 = OK

Destination Status             = OK

Last Sync Time                 = Tue Feb 12 18:36:50 JST 2013

Replication Role               = source

Previous Transfer Rate (KB/s)  = 175

Previous Read Rate (KB/s)      = 2727

Previous Write Rate (KB/s)     = 303

Average Transfer Rate (KB/s)   = 208←

Average Read Rate (KB/s)       = 3623←

Average Write Rate (KB/s)      = 356←

Target

[nasadmin@NS700 ~]$ nas_replicate -i -all

ID                             = 156_SL7E9102300057_0000_161_CK200043300733_0000

Name                           = riso_rep

Source Status                  = OK

Network Status                 = OK

Destination Status             = OK

Last Sync Time                 = Tue Feb 12 18:36:50 JST 2013

Replication Role               = destination

Previous Transfer Rate (KB/s)  = 175

Previous Read Rate (KB/s)      = 2727

Previous Write Rate (KB/s)     = 303

Average Transfer Rate (KB/s)   = 208←

Average Read Rate (KB/s)       = 3623←

Average Write Rate (KB/s)      = 356←

can anybody knows ?

thanks