From 4c6604db27f26998b72fd815b6bd1de5a3b08780 Mon Sep 17 00:00:00 2001 From: tv Date: Thu, 5 Nov 2026 00:56:24 +0100 Subject: own tree shape --- docs/measurements.md | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'docs/measurements.md') diff --git a/docs/measurements.md b/docs/measurements.md index daf8008..81ca0fc 100644 --- a/docs/measurements.md +++ b/docs/measurements.md @@ -98,6 +98,9 @@ or caught up over many small messages. | `topology.view.stable` | `stable_members` | Members whose registry entry says `stable`. | | `topology.view.neighbours` | `neighbours` | Current neighbours: peers this node keeps alive and syncs with on its own. At least `k` (links chosen by either end count); well above `k` on a stable member that many others chose, bounded at about 8 × k. | | `topology.view.stableNeighbours` | `stable_neighbours` | Of those, stable members. | +| `topology.view.ownTree.members` | `own_tree_members` | Other members in this node's own writer's tree: what its writes go along ([`peers.md`](peers.md)), as this node computes it (what members beyond its neighbours reach is taken from the member list's graph). | +| `topology.view.ownTree.depth`, `.meanDepth` | `own_tree_depth`, `own_tree_mean_depth` | The most hops along it from this node to one of them, and the mean. | +| `topology.view.ownTree.offTree` | `own_tree_off_members` | Members it doesn't reach: no member they reach comes before them, they are below one such, or the member list's graph doesn't connect them to this node. They get its writes by announcement. | `view` is absent until the node is ready and knows the member list; until then everyone counts as a neighbour. @@ -105,7 +108,9 @@ everyone counts as a neighbour. **Interpretation.** `members − reachable − 1` is how many members are offline or unreachable from here; if it is half or more of the electorate, no remake can commit. `neighbours` far above `k` on one node means it is a hub (a stable member among few), -which is by design but costs it bandwidth. +which is by design but costs it bandwidth. A deep own tree, or members off it, means this node's +writes take long to reach everyone: a writer behind NAT (one member reached), or +transports bridged by few members. ## Stability -- cgit v1.3.1