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Thanks; I've received several suggestions for other metrics to collect that I
hope to implement soon, but you're right in that tracking per-peer pings is a
different type of metric than what I'm currently collecting. I actually noted
the lack of pong messages in a post I made a few weeks ago:
http://coinchomp.com/2014/04/27/peeking-hood-running-bitcoin-node/
Once I added metrics for sent messages, it validated my theory: my node has
never sent a single ping request to a peer and thus has never received a pong
message. I can't even add sent pings or received pongs to this chart because
they don't exist in my graphite instance.
http://statoshi.info:8080/render/?width=1548height=883_salt=1400066995.622target=stats.message.received.pingtarget=stats.message.sent.ponglineMode=connectedbgcolor=00fgcolor=FF
I guess my question regarding ping stats is how useful that information would
be - it seems to me that if we are trying to quantify the cohesiveness of the
network, we should instead be observing the message propagation times. Though
that's outside the scope of my project; there are other people who are doing
just that.
http://bitcoinstats.com/network/propagation/
Jameson
On 05/13/2014 01:48 PM, Josh Lehan wrote:
I agree, it looks very slick. Well done.
While on the subject of connected peers, what about the idea of adding the
ping time from this node to other peers? The problem with fitting that
information into the current design is that the graphs seem to be comprised
of overall statistics for this node, not per-peer statistics that can vary
between peers (such as ping time). If a line were to be added to a graph to
represent each peer's ping time, the number of lines (statistics) on the
graph would have to vary in real time as peers are added or removed, which
would be a challenge.
I earlier added the ping feature to bitcoind, and it works to measure the
ping time, however this feature is on-demand: it won't ping other nodes
unless requested. So, something would have to send the ping RPC command on
a regular schedule, to ensure the graph is updated with new information.
Also, there is currently no support for overlapping pings (although that
would be easy to add), so if a peer is slow enough to not respond at all to
the first ping request, and a second ping request goes out in the meantime,
any late response from the first ping request would then be discarded.
Great graphs, and these are just brainstorms for future ideas :)
Josh Lehan
Sent from my iPad
On May 13, 2014, at 4:43, Wladimir laa...@gmail.com wrote:
Hello Jameson,
On Sun, May 11, 2014 at 7:14 PM, Jameson Lopp jameson.l...@gmail.com
wrote:
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Since it seems unlikely that we'll be able to ship an integrated stats /
monitoring feature in the short term, I went ahead and set up a public
Statoshi instance and threw a nicer interface on top of it.
http://statoshi.info
Must say it looks very nice.
One comment about the graphs: in the 'connected peers' chart you
visualize some larger quantities (especially knownAddresses) and some
very small ones (peer.(dis)connect). This makes the latter invisible
due to scale.
Some random stats may be useful as well:
- Number of connected peers that are SPV clients or full nodes (NODE_NETWORK)
- Current block height (so that it's possible to detect stuck nodes)
- Number of transactions in mempool
- Number of transactions in UTXO set
- Maybe some fee statistics,
https://github.com/bitcoin/bitcoin/pull/3959 would be useful here
- Number of orphan blocks/orphan transactions
Wladimir
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