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Boris_Rubarth
Product and Topic Expert
Product and Topic Expert
2,888





Do not complain about insufficient migration rate if you use a 1 GBit network card!

Do your Mathematic Obligations and check your network for performance prior to DMO.

 

Boris Rubarth

Product Management Software Logistics, SAP SE

 




 

P.S. Sorry, yes, the blog above is short and rude, but I had to draw your attention on the network side of housekeeping:

You have to check the network performance before starting with DMO: check the througput between source DB and PAS (on which SUM and R3load processes are running), and between PAS and target DB. One network tool that I am aware of is iPerf: "iPerf3 is a tool for active measurements of the maximum achievable bandwidth on IP networks."  (http://iPerf.fr). But even ftp can provide a first insight: transfer a large file, and check the throughput. Measurements like this can detect a wrong configuration of network cards, a transfer limitation due to firewalls, or other hurdles.

And network card size matters! Using a 1 Gbit network card means a maximum throughput of 439 GB / hour theoretically, practically ~ 350 GB / hour. [The math is: 1 Gbit card means 1000 MBits per second, this is 125 MByte per second, this is 439 GB per hour.]  DMO can do more, if you let it  ... see Optimizing DMO Performance So you should rather use a 10 Gbit network card.


Feel free to add your favorite network tool as comment for this blog.

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