diff --git a/doc/release-notes.md b/doc/release-notes.md index a29094b51..9aac2a137 100644 --- a/doc/release-notes.md +++ b/doc/release-notes.md @@ -4,3 +4,21 @@ release-notes at release time) Notable changes =============== +Reduce upload traffic +--------------------- + +A major part of the outbound traffic is caused by serving historic blocks to +other nodes in initial block download state. + +It is now possible to reduce the total upload traffic via the `-maxuploadtarget` +parameter. 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). +Moreover, any SPV peer is disconnected when they request a filtered block. + +This option can be specified in MiB per day and is turned off by default +(`-maxuploadtarget=0`). +The recommended minimum is 144 * MAX_BLOCK_SIZE (currently 144MB) per day. + +A more detailed documentation about keeping traffic low can be found in +[/doc/reducetraffic.md](/doc/reducetraffic.md).