Disk Usage Optimization

Customize the configuration settings to lower the disk requirements for your validator node {synopsis}

Blockchain database tends to grow over time, depending e.g. on block speed and transaction amount. For Kynno, we are talking about close to 20GB of disk usage in first two weeks.

There are few configurations that can be done to reduce the required disk usage quite significantly. Some of these changes take full effect only when you do the configuration and start syncing from start with them in use.

Indexing

If you do not need to query transactions from the specific node, you can disable indexing. On config.toml set

indexer = "null"

If you do this on already synced node, the collected index is not purged automatically, you need to delete it manually. The index is located under the database directory with name data/tx_index.db/.

Configure pruning

By default every 500th state, and the last 100 states are kept. This consumes a lot of disk space on long run, and can be optimized with following custom configuration:

pruning = "custom"
pruning-keep-recent = "100"
pruning-keep-every = "0"
pruning-interval = "10"

Configuring pruning-keep-recent = "0" might sound tempting, but this will risk database corruption if the kynnod is killed for any reason. Thus, it is recommended to keep the few latest states.

Logging

By default the logging level is set to info, and this produces a lot of logs. This log level might be good when starting up to see that the node starts syncing properly. However, after you see the syncing is going smoothly, you can lower the log level to warn (or error). On config.toml set the following

log_level = "warn"

Also ensure your log rotation is configured properly.