# reth db checksum Calculates the content checksum of a table ```bash $ reth db checksum --help Usage: reth db checksum [OPTIONS] Arguments:
The table name Options: --start-key The start of the range to checksum --end-key The end of the range to checksum --limit The maximum number of records that are queried and used to compute the checksum --instance Add a new instance of a node. Configures the ports of the node to avoid conflicts with the defaults. This is useful for running multiple nodes on the same machine. Max number of instances is 200. It is chosen in a way so that it's not possible to have port numbers that conflict with each other. Changes to the following port numbers: - `DISCOVERY_PORT`: default + `instance` - 1 - `AUTH_PORT`: default + `instance` * 100 - 100 - `HTTP_RPC_PORT`: default - `instance` + 1 - `WS_RPC_PORT`: default + `instance` * 2 - 2 [default: 1] -h, --help Print help (see a summary with '-h') Logging: --log.stdout.format The format to use for logs written to stdout [default: terminal] Possible values: - json: Represents JSON formatting for logs. This format outputs log records as JSON objects, making it suitable for structured logging - log-fmt: Represents logfmt (key=value) formatting for logs. This format is concise and human-readable, typically used in command-line applications - terminal: Represents terminal-friendly formatting for logs --log.stdout.filter The filter to use for logs written to stdout [default: ] --log.file.format The format to use for logs written to the log file [default: terminal] Possible values: - json: Represents JSON formatting for logs. This format outputs log records as JSON objects, making it suitable for structured logging - log-fmt: Represents logfmt (key=value) formatting for logs. This format is concise and human-readable, typically used in command-line applications - terminal: Represents terminal-friendly formatting for logs --log.file.filter The filter to use for logs written to the log file [default: debug] --log.file.directory The path to put log files in [default: /logs] --log.file.max-size The maximum size (in MB) of one log file [default: 200] --log.file.max-files The maximum amount of log files that will be stored. If set to 0, background file logging is disabled [default: 5] --log.journald Write logs to journald --log.journald.filter The filter to use for logs written to journald [default: error] --color Sets whether or not the formatter emits ANSI terminal escape codes for colors and other text formatting [default: always] Possible values: - always: Colors on - auto: Colors on - never: Colors off Display: -v, --verbosity... Set the minimum log level. -v Errors -vv Warnings -vvv Info -vvvv Debug -vvvvv Traces (warning: very verbose!) -q, --quiet Silence all log output ```