ibdsim

README

ibdsim

This simulates initial block download (IBD) using the utreexo accumulator. There are 2 things it can do depending on which function is called or commented out in main(): buildProofs() or runIBD(). In both cases, a txo file with all of the outpoints and their durations is read. For buildProofs() a levelDB folder is created with proofs for every block. For runIBD() that DB folder is read, and the proofs are used to simulate a utreexo node syncing process. Important performance data about the sync process can be obtained & optimized.

example output: Block 546000 add 854493089 del 804238642 pol nl 50254447 tops 18 he 6718011979 re 608922796 ow 2145511834 plus 1164.54 total 25214.65

This simulation has reached block height 546000. 854493089 txos have been added, and 804238642 txos have been removed. The pollard has 50254447 leaves (nl = NumLeaves). (this should be the difference between adds and removes) There are 18 treetops, as 50254447 in binary has 18 1-bits. 6718011979 hashes have been performed through the sync process (this number is probably off) (he = hashes ever). 608922796 txos have been "remembered" or cached (re = remember). 2145511834 hashes have been sent over the wire (ow = over wire) during the sync simulation (or would have been sent over the wire since this is all on one machine). With 32 byte hashes, that would be around 68GB of total proof data.

Documentation

Index

• func BuildProofs(ttlfn string, sig chan bool) error
• func Histogram(ttlfn string, sig chan bool) error
• func MemStatString(fname string) string
• func RunIBD(ttlfn string, schedFileName string, sig chan bool) error
• type TxoTTL

Functions

func BuildProofs

func BuildProofs(ttlfn string, sig chan bool) error

build the bridge node / proofs

func Histogram

func Histogram(ttlfn string, sig chan bool) error

func MemStatString

func MemStatString(fname string) string

func RunIBD

func RunIBD(ttlfn string, schedFileName string, sig chan bool) error

run IBD from block proof data we get the new utxo info from the same txos text file the deletion data and proofs though, we get from the leveldb which was created by the bridge node.

Types

type TxoTTL

type TxoTTL struct {
	utreexo.Hash
	ExpiryBlock int32
}