Cosmos-Pruner

The goal of this project is to be able to prune a tendermint data base of blocks and an Cosmos-sdk application DB of all but the last X versions. This will allow people to not have to state sync every x days.

This tool works with a subset of modules (store keys). They are automatically detected based on the stored data.

WARNING

Due to inefficiencies of iavl and the simple approach of this tool, it can take ages to prune the data of a large node.

We are working on integrating this natively into the Cosmos-sdk and Tendermint

How to use

Cosmprund works of a data directory that has the same structure of a normal cosmos-sdk/tendermint node. By default it will prune all but 10 blocks from tendermint, and all but 10 versions of application state.

Note: Application pruning can take a very long time dependent on the size of the db.

# clone & build cosmprund repo
git clone https://github.com/binaryholdings/cosmprund
cd cosmprund
make build

# stop daemon/cosmovisor
sudo systemctl stop cosmovisor

# run cosmprund 
./build/cosmprund prune ~/.gaiad/data --cosmos-sdk=false

Flags:

• data-dir: path to data directory if not default
• blocks: amount of blocks to keep on the node (Default 10)
• versions: amount of app state versions to keep on the node (Default 10)
• cosmos-sdk: If pruning a non cosmos-sdk chain, like Nomic, you only want to use tendermint pruning or if you want to only prune tendermint block & state as this is generally large on machines(Default true)
• tendermint: If the user wants to only prune application data they can disable pruning of tendermint data. (Default true)

Note

To use this with RocksDB you must:

go install -ldflags '-w -s -X github.com/cosmos/cosmos-sdk/types.DBBackend=rocksdb' -tags rocksdb ./...