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author | Jonas Schnelli <dev@jonasschnelli.ch> | 2015-11-10 13:40:39 +0100 |
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committer | Jonas Schnelli <dev@jonasschnelli.ch> | 2015-11-11 13:28:08 +0100 |
commit | 6a776faff930986be8c25f28c667b2b41d86aad1 (patch) | |
tree | de04a0a749de25605b1ec1a1845389111357eb76 /doc | |
parent | de7d4591a7ce064ba64c36ccb729f1d94c21aa90 (diff) |
[doc] add documentation how to reduce traffic
Diffstat (limited to 'doc')
-rw-r--r-- | doc/reducetraffic.md | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/doc/reducetraffic.md b/doc/reducetraffic.md new file mode 100644 index 0000000000..085da1a287 --- /dev/null +++ b/doc/reducetraffic.md @@ -0,0 +1,36 @@ +REDUCE TRAFFIC +============== + +Some node operators need to deal with bandwith cap given 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). + +The default settings can result in relatively significant traffic consumption. + + +Ways to reduce traffic: + +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). +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). +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`) + +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. + +3. Reduce maximal 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. |