Hello, every one.

I am a rrd users.

now i encount one problem about adjust the DS of the rrd file which owning 
existed datas.

My question is as follows:

filename : cpu.rrd

the image before adjustment :
-----------------------------------------------------------------------------------
DS1        DS2         DS3        DS4       DS5
  ↓           ↓            ↓          ↓           ↓
in use     in use       in use     not use     not use
-----------------------------------------------------------------------------------

My nees is as follows:
1. discard the existed data of DS1.
2. move the existed data of DS2 to DS1.
3. move the existed data of DS3 to DS2.

the image after adjustment :
-----------------------------------------------------------------------------------
  
DS1       DS2         DS3        DS4        DS5
  ↓           ↓            ↓          ↓           ↓
in use    in use       not use    not use    not use    
-----------------------------------------------------------------------------------
  

Any one have the above experience?

If the only method is to modify the dumped xml file, Any one could teach me 
that the details about modification in XML file.?

Thanks a lot.

Best Regards.

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