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[doc] Improve lanaguge in reducetraffic.md

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fanquake 2015-11-11 18:53:48 +08:00 committed by Jonas Schnelli
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REDUCE TRAFFIC
Reduce Traffic
==============
Some node operators need to deal with bandwith cap given by their ISPs.
Some node operators need to deal with bandwith caps imposed by their ISPs.
By default, bitcoin-core allows up to 125 connections to different peers, 8 of
them outbound (and therefore 117 max inbound connections).
which are outbound. You can therefore, have at most 117 inbound connections.
The default settings can result in relatively significant traffic consumption.
Ways to reduce traffic:
1. Use `-maxuploadtarget=<MiB per day>`
## 1. Use `-maxuploadtarget=<MiB per day>`
A major part of the traffic is caused by serving historic blocks to other nodes
in initial blocks download state (syncing up a new node).
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 but a threshold to minimize the outbound
traffic. When the limit is about to be reached, the uploaded data is cut by not
serving historic blocks (blocks older than one week).
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. **The recommended minimum is 144 blocks per day (max. 144MB
per day)**
2. Disable "listening" (`-listen=0`)
## 2. Disable "listening" (`-listen=0`)
Disable listening will result in fewer nodes connected (remind the max of 8
outbound peers). Fewer nodes will result in less traffic usage because relaying
blocks and transaction needs to be passed to fewer nodes.
Disabling listening will result in fewer nodes connected (remember the maximum of 8
outbound peers). Fewer nodes will result in less traffic usage as you are relaying
blocks and transactions to fewer nodes.
3. Reduce maximal connections (`-maxconnections=<num>`)
## 3. Reduce maximum connections (`-maxconnections=<num>`)
Reducing the connected nodes to a miniumum can be desired in case traffic
limits are tiny. Keep in mind that bitcoin trustless model works best if you are
connected to a handfull of nodes.
Reducing the maximum connected nodes to a miniumum 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.