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transacter_test.go |
README.md
tm-bench
Tendermint blockchain benchmarking tool:
For example, the following:
tm-bench -T 10 -r 1000 localhost:26657
will output:
Stats Avg StdDev Max Total
Txs/sec 818 532 1549 9000
Blocks/sec 0.818 0.386 1 9
Quick Start
Install Tendermint
This currently is setup to work on tendermint's develop branch. Please ensure
you are on that. (If not, update tendermint
and tmlibs
in gopkg.toml to use
the master branch.)
then run:
tendermint init
tendermint node --proxy_app=kvstore
tm-bench localhost:26657
with the last command being in a seperate window.
Usage
tm-bench [-c 1] [-T 10] [-r 1000] [-s 250] [endpoints]
Examples:
tm-bench localhost:26657
Flags:
-T int
Exit after the specified amount of time in seconds (default 10)
-c int
Connections to keep open per endpoint (default 1)
-r int
Txs per second to send in a connection (default 1000)
-s int
Size per tx in bytes
-v Verbose output
How stats are collected
These stats are derived by having each connection send transactions at the specified rate (or as close as it can get) for the specified time. After the specified time, it iterates over all of the blocks that were created in that time. The average and stddev per second are computed based off of that, by grouping the data by second.
To send transactions at the specified rate in each connection, we loop through the number of transactions. If its too slow, the loop stops at one second. If its too fast, we wait until the one second mark ends. The transactions per second stat is computed based off of what ends up in the block.
Note that there will be edge effects on the number of transactions in the first and last blocks. This is because transactions may start sending midway through when tendermint starts building the next block, so it only has half as much time to gather txs that tm-bench sends. Similarly the end of the duration will likely end mid-way through tendermint trying to build the next block.
Each of the connections is handled via two separate goroutines.
Development
make get_vendor_deps
make test