---
name: "fsck-larch"
section: "1"
platform: "linux"
package: "python-larch"
version: "1.20151025-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/fsck-larch"
---

# fsck-larch(1)

verify that a larch B-tree is internally consistent

## NAME

fsck-larch - verify that a larch B-tree is internally consistent

## SYNOPSIS

**fsck-larch** \[**--config=*FILE***\] \[**--dump-config**\] \[**--dump-memory-profile=*METHOD***\] \[**--dump-setting-names**\] \[**--fix**\] \[**--generate-manpage=*TEMPLATE***\] \[**-h**\] \[**--help**\] \[**--help-all**\] \[**--list-config-files**\] \[**--log=*FILE***\] \[**--log-keep=*N***\] \[**--log-level=*LEVEL***\] \[**--log-max=*SIZE***\] \[**--log-mode=*MODE***\] \[**--memory-dump-interval=*SECONDS***\] \[**--no-default-configs**\] \[**--no-fix**\] \[**--output=*FILE***\] \[**--trace=*PATTERN***\] \[**--version**\] \[*FILE*\]...

## DESCRIPTION

**fsck-larch** reads an on-disk, committed B-tree created by the **larch** Python library, and verifies that it is internally consistent. It reports any problems it finds, but does not currently fix them.

## OPTIONS

- **--fix**

  fix problems found?

- **--generate-manpage**=*TEMPLATE*

  SUPPRESSHELP

- **-h**, **--help**

  show this help message and exit

- **--no-fix**

  - **--output**=*FILE*

  write output to FILE, instead of standard output

- **--trace**=*PATTERN*

  add PATTERN to trace patterns

- **--version**

  show program's version number and exit

### Configuration files and settings

- **--config**=*FILE*

  add FILE to config files

- **--dump-config**

  write out the entire current configuration

- **--dump-setting-names**

  SUPPRESSHELP

- **--help-all**

  show all options

- **--list-config-files**

  SUPPRESSHELP

- **--no-default-configs**

  clear list of configuration files to read

### Logging

- **--log**=*FILE*

  write log entries to FILE (default is to not write log files at all); use "syslog" to log to system log, or "none" to disable logging

- **--log-keep**=*N*

  keep last N logs (10)

- **--log-level**=*LEVEL*

  log at LEVEL, one of debug, info, warning, error, critical, fatal (default: debug)

- **--log-max**=*SIZE*

  rotate logs larger than SIZE, zero for never (default: 0)

- **--log-mode**=*MODE*

  set permissions of new log files to MODE (octal; default 0600)

### Peformance

- **--dump-memory-profile**=*METHOD*

  make memory profiling dumps using METHOD, which is one of: none, simple, or meliae (default: simple)

- **--memory-dump-interval**=*SECONDS*

  make memory profiling dumps at least SECONDS apart

## SEE ALSO

Larch home page (*http://liw.fi/larch/*).