Amount of open connections

Node Operators
1

Hey all,

I just went through my storagenode logs. One thing I noticed is the increasing number of ports used for sending data back to the satellite. Silly question, but isn’t there a think like TCP keep-alive? Correct me if I’m not getting this, but always opening a new connection brings a) overhead and is b) slower (latency)?

“Action”: “GET”, “Offset”: 0, “Size”: 2048, “Remote Address”: “172.17.0.1:43967”}
“Action”: “GET”, “Offset”: 0, “Size”: 7424, “Remote Address”: “172.17.0.1:43969”}
“Action”: “GET”, “Offset”: 0, “Size”: 7680, “Remote Address”: “172.17.0.1:43970”}
“Action”: “GET”, “Offset”: 0, “Size”: 11264, “Remote Address”: “172.17.0.1:43972”}
“Action”: “GET”, “Offset”: 0, “Size”: 11264, “Remote Address”: “172.17.0.1:43974”}

Regards

2

Node talks to customers. Customers talk to node. Each customer needs at least one connection. Many customers → many connections.

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3

And to extend @arrogantrabbit’s answer, even when a single consumer (as identified by IP in your case) is so busy that fetches many pieces from one node within a short period of time, this traffic is not easily predictable. Keep-alives in anticipation of another fetch would need to be maintained by a single consumer to basically most of the nodes in the world, which is not feasible from consumer’s perspective.

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4

The satellite does not act as a proxy for client data; all GET/PUT connections are made by clients (S3 gateways are also clients).
Repair workers (remote satellite parts distributed worldwide) execute GET_REPAIR/PUT_REPAIR requests.
Audit workers (remote distributed satellite parts) execute GET_AUDIT requests.
The only connections from the satellite occur during node check-in; this is typically a DRPC PING to the node’s external address using QUIC and TCP, which is provided during check-in. All other communications are statistics exchanges, which also occur after a successful check-in initiated by the node.
Another connection from the node to the satellite is to send signed completed orders (for usage payments).

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