You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
2.4 KiB
57 lines
2.4 KiB
3 years ago
|
Reduce Traffic
|
||
|
|
==============
|
||
|
|
|
||
|
|
Some node operators need to deal with bandwidth caps imposed by their ISPs.
|
||
|
|
|
||
|
|
By default, Bitcoin Core allows up to 125 connections to different peers, 10 of
|
||
|
|
which are outbound. You can therefore, have at most 115 inbound connections.
|
||
|
|
Of the 10 outbound peers, there can be 8 full-relay connections and 2
|
||
|
|
block-relay-only ones.
|
||
|
|
|
||
|
|
The default settings can result in relatively significant traffic consumption.
|
||
|
|
|
||
|
|
Ways to reduce traffic:
|
||
|
|
|
||
|
|
## 1. Use `-maxuploadtarget=<MiB per day>`
|
||
|
|
|
||
|
|
A major component of the traffic is caused by serving historic blocks to other nodes
|
||
|
|
during the initial blocks download phase (syncing up a new node).
|
||
|
|
This option can be specified in MiB per day and is turned off by default.
|
||
|
|
This is *not* a hard limit; only a threshold to minimize the outbound
|
||
|
|
traffic. When the limit is about to be reached, the uploaded data is cut by no
|
||
|
|
longer serving historic blocks (blocks older than one week).
|
||
|
|
Keep in mind that new nodes require other nodes that are willing to serve
|
||
|
|
historic blocks.
|
||
|
|
|
||
|
|
Peers with the `download` permission will never be disconnected, although their traffic counts for
|
||
|
|
calculating the target.
|
||
|
|
|
||
|
|
## 2. Disable "listening" (`-listen=0`)
|
||
|
|
|
||
|
|
Disabling listening will result in fewer nodes connected (remember the maximum of 10
|
||
|
|
outbound peers). Fewer nodes will result in less traffic usage as you are relaying
|
||
|
|
blocks and transactions to fewer nodes.
|
||
|
|
|
||
|
|
## 3. Reduce maximum connections (`-maxconnections=<num>`)
|
||
|
|
|
||
|
|
Reducing the maximum connected nodes to a minimum could be desirable if traffic
|
||
|
|
limits are tiny. Keep in mind that bitcoin's trustless model works best if you are
|
||
|
|
connected to a handful of nodes.
|
||
|
|
|
||
|
|
## 4. Turn off transaction relay (`-blocksonly`)
|
||
|
|
|
||
|
|
Forwarding transactions to peers increases the P2P traffic. To only sync blocks
|
||
|
|
with other peers, you can disable transaction relay.
|
||
|
|
|
||
|
|
Be reminded of the effects of this setting.
|
||
|
|
|
||
|
|
- Fee estimation will no longer work.
|
||
|
|
- It sets the flag "-walletbroadcast" to be "0", only if it is currently unset.
|
||
|
|
Doing so disables the automatic broadcasting of transactions from wallet. Not
|
||
|
|
relaying other's transactions could hurt your privacy if used while a wallet
|
||
|
|
is loaded or if you use the node to broadcast transactions.
|
||
|
|
- If a peer has the forcerelay permission, we will still receive and relay
|
||
|
|
their transactions.
|
||
|
|
- It makes block propagation slower because compact block relay can only be
|
||
|
|
used when transaction relay is enabled.
|