From c3dc87eac021fdb6c942a512429ed6ca973e32b0 Mon Sep 17 00:00:00 2001 From: Douglas Bagnall Date: Tue, 14 Apr 2015 10:12:48 +1200 Subject: [PATCH] KCC: (doc) explain intrasite max edge count a bit better Signed-off-by: Douglas Bagnall Reviewed-by: Garming Sam Reviewed-by: Andrew Bartlett --- source4/scripting/bin/samba_kcc | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/source4/scripting/bin/samba_kcc b/source4/scripting/bin/samba_kcc index 72d58345bef..28c4dfe4918 100755 --- a/source4/scripting/bin/samba_kcc +++ b/source4/scripting/bin/samba_kcc @@ -1903,6 +1903,14 @@ class KCC(object): 50 48 4903 :param node_count: total number of nodes in the replica graph + + The intention is that there should be no more than 3 hops + between any two DSAs at a site. With up to 7 nodes the 2 edges + of the ring are enough; any configuration of extra edges with + 8 nodes will be enough. It is less clear that the 3 hop + guarantee holds at e.g. 15 nodes in degenerate cases, but + those are quite unlikely given the extra edges are randomly + arranged. """ n = 0 while True: