CTDB scaling?

[Richard Sharpe]

Hi folks,

In Tridge's 2007 paper:

he claims the following performance scaling:
https://www.samba.org/~tridge/sambaxp-07/ctdb.pdf

NEW (CTDB) approach
1 node 42 Mbytes/sec
2 nodes 168 MBytes/sec
3 nodes 211 MBytes/sec
4 nodes 243 MBytes/sec

This seems counter intuitive. 2 nodes gets four times what one node
gets and four nodes gets almost six times what 1 node does?

What is the explanation for that?

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)