dhconfig checkpoint
Checkpoint files are special files written by Deephaven to periodically record the state of tables on disk. These files allow the system to efficiently recover or reconstruct table data after a restart or failure, by resuming from the last checkpoint rather than replaying all historical data. Checkpoints are particularly important for large or persistent tables, as they significantly reduce recovery time and resource usage. Administrators may need to examine checkpoint files to verify table persistence, troubleshoot data issues, or audit system state.
The checkpoint configuration data type of the dhconfig tool is used to examine table checkpoint files on disk. Authentication options do not apply to this command; the executing user must have read access to the files to be examined. Checkpoint files are named table.size by default. File arguments may be the checkpoint file itself, or the directory containing table.size.
checkpoint has only one action: list. list lists checkpoint configurations to a file or to stdout. The --help argument provides detailed information on list's available options and arguments:
...followed by a description of all of the subcommand's options and some usage examples.
list examples
Display a specific checkpoint file:
Display all checkpoint files starting at a directory (recursively searching):
Display a summary of all checkpoint files starting at a directory in CSV format:
Display a summary of all checkpoint files in a list file in CSV format:
Examples with output:
Output:
Output: