# Gavin Andresen # 2013-04-30 13:57:59 # https://bitcointalk.org/index.php?topic=189792.msg1985439#msg1985439 @s{quotedtext} @s{quotedtext} @p{brk} Network bandwidth is currently growing about 20% per year, or roughly doubling every four years. @p{par} Satoshi's original code had a 32MB block size limit, which he dropped to 1MB as part of a bunch of band-aid fixes to make denial-of-service attacks harder. @p{par} RE: density of full nodes: In my opinion, if it is affordable to run a full node (less than, say, $100 per month in server costs@p{--} that is a trivial monthly cost for most businesses and some individuals) then we'll continue to see tens of thousands of full nodes. @p{par} Median cost of a dedicated server with lots of bandwidth, disk and CPU is @p{(link}under $100/month these days@p{link)}, which would support a block size at least ten times the current maximum. @p{par} And all of THAT is before even starting to think about possible optimizations (e.g. figure out how to mitigate the "insert malicious data" problem@p{--} maybe Peter Todd's security bonds would be helpful@p{--} and a shared DHT storing all valid transactions combined with bloom filters on connections could make it cheap for any one machine to be a fully validating node). @p{par} Please, don't listen to all of the FUD being thrown around about raising the block size even before there is any solid proposal for what should be done. @p{par}