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* avoid stalled sourcetv10 hours1-0/+3
| | | | | | | | | | | | | A source given up for not answering our sync messages could become the source again straight away. Whoever asks first after the reset takes the role, and that's often the same peer, which would then stall for another delivery limit. Now, a stalled source isn't chosen again for one more delivery_limit. If it's the only candidate, catching up waits that long and then tries it again. Before, a retry with that peer couldn't have helped any sooner anyway: a source is only given up after a whole delivery limit without a sync message, and that clock restarts when it is chosen again.
* MYCELIUM_DELIVERY_LIMIT -> Timing::delivery_limittv10 hours1-0/+6
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* make sync reply timeout part of timingtv10 hours1-9/+32
| | | | This enables upcoming lossy-links tests.
* recompute neighbours whenever topology changestv10 hours1-0/+3
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* require catch-up source to make progresstv12 hours1-0/+6
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* late messages don't flip peer's epoch backtv12 hours1-1/+16
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* allow to persist documenttv12 hours1-0/+2
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* add files module to consistently track statstv19 hours1-0/+2
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* add state filetv21 hours1-0/+2
| | | | | This allows storing the swarm ID and additionally discovered seeds, which prevents a formerly genesis node to start a new document.
* fix wording around swarm key admissiontv35 hours1-2/+2
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* coalesce announcementstv37 hours1-0/+3
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* cache headstv37 hours1-13/+20
| | | | To reduce the number of write locks, heads are now cached.
* follow and download from ready members onlytv37 hours1-2/+6
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* only protocol-writers may modify _continuumtv38 hours1-0/+3
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* put remake content into blobstv39 hours1-8/+20
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* add chunked download and use it during rejointv41 hours1-0/+24
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* add API and CLI to print effective configtv42 hours1-0/+3
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* introduce majority voting on remakestv44 hours1-0/+4
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* add electoratetv44 hours1-0/+2
| | | | | For an upcoming change in remake coordination, nodes now maintain their self-assessed liveness in the document.
* add node aliasestv2 days1-0/+2
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* add throughput statstv2 days1-1/+14
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* add propagation statstv2 days1-1/+6
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* add per peer incident statstv2 days1-2/+38
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* add swarm statstv2 days1-0/+2
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* add traffic countertv2 days1-0/+2
| | | | | | | | | | This introduces a new wrapper that counts messages and payload bytes per peer, split by kind (hello, helloReply, sync, ping, pong), each sent, received and refused. The traffic counter goes around the firewall, which means messages dropped outbound are still counted as sent, and messages dropped inbound don't count as received.
* assess swarm stabilitytv2 days1-0/+2
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* record RTT sampling instanttv2 days1-0/+6
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* prefer closer sources to catch uptv2 days1-0/+6
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* record RTT from keepalive messagestv2 days1-6/+9
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* pull missing changestv2 days1-0/+2
| | | | | | Nodes push changes to their neighbours but don't relay them directly. In a partial mesh, nodes can learn about missing changes via keepalive messages and can pull them from their neighbours.
* find reachable neighbourstv2 days1-0/+30
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* sync with neighbourstv2 days1-0/+18
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* use nonce in handshaketv2 days1-0/+3
| | | | | To prevent stale hello replies to cause joins and thus stale sessions, each run gets a random ID, which used as nonce in the handshake.
* consolidate backoff codetv2 days1-20/+25
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* retry using fresh messagestv2 days1-11/+52
| | | | | Don't store encoded messages but retry using a newly generated one. That way any accumulated changes can be delivered at once.
* heal from noticed divergencetv2 days1-6/+27
| | | | | Wait 2*keepalive but at least 20 s to trigger resync so that lost messages can be resent first.
* heal after reply timeouttv2 days1-0/+3
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* drop stall breaker; resend needed changestv2 days1-17/+0
| | | | | | The stall breaker was superseded by regular re-handshaking Re-handshaking also gets triggered, when a node needs some of the heads its peer believes it has already sent. In that case the peer now resends what's needed.
* both sides may open sync after resettv2 days1-121/+26
| | | | | | | | | | Ready nodes will leave the first message to the pear that isn't ready. Hello and hello reply now carry ready, so readiness is known from the very first contact, before any sync. Together with the sync messages and keepalives, reports_ready is always current. After epoch switch, pings go to everyone except ready members already on the new epoch, these learn from the lagging peer's opening.
* perform handshake in one round triptv2 days1-5/+0
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* drop pre-membership sync messagestv2 days1-4/+0
| | | | | The handshake resets the session anyway, and the sender's reply timeout resends what still matters.
* bump number of heads in keepalive messagestv2 days1-0/+4
| | | | | Instead of arbitrarily limiting the number to 16, allow filling keepalive messages as long as they don't cause mycelium to chunk it.
* probe sync source during catch-uptv2 days1-3/+14
| | | | This allows changing sources without the fixed 30 s stall duration.
* enrich keepalive contenttv2 days1-5/+9
| | | | | | | Add ready and syncs_with_you flags as well as actual heads, so the peer - ready: same meaning as in the sync message - syncs_with_you: sender counts recipient as member and in same epoch - heads: allows to tell who's behind or if both sides have changes
* use only ready peers as sync sourcetv2 days1-0/+4
| | | | | | Sync messages now carries a ready flag, telling whether the sending peer itself is joined or is itself still (re-)joining. In the latter case, the peer won't be used as sync source.
* catch up with a single source onlytv3 days1-0/+15
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* introduce announce opening varianttv3 days1-6/+14
| | | | | This prevents a fall back to the 3 s grace period if a reset happens between the epoch switch and our opening went out.
* record the cause that started a sync sessiontv3 days1-6/+59
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* merge sync_reset_at and epoch_unannounced into openingtv3 days1-47/+64
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* introduce sync sessiontv3 days1-81/+90
| | | | SyncSession holds all fields that get reset by reset_sync()
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