Perform Nessie Maintenance

This topic provides usage information for the dremio-admin nessie-maintenance CLI command.

note

Automatic Nessie maintenance and the manual CLI command are available in Dremio 21.4.0+ and 22.1.1+. Because Nessie maintenance is performed automatically, it is not likely that you will need to run the CLI command unless advised by Dremio Support.

Requirements

• Perform a backup before running the command (see Backup for more information).

• Shut down all cluster nodes completely before running the command (see Startup/Shutdown for more information).

Syntax

Syntax for Nessie maintenance command

dremio-admin nessie-maintenance [args...]

Arguments

Arguments for Nessie maintenance command

--compact-global-log
Compact Nessie's global log file (legacy data).

--dry-run
Test repository maintenance activities without making any changes. This is useful for estimating the amount of maintenance work that would be performed.

-h, --help
Show usage and exit.

--list-keys
List live keys without making any changes or performing any maintenance.

--progress
Report process every Nth maintenance event, such as deleting an entity. This entry is ignored if not a positive integer value.
Default: 0 (ignored)

--purge-key-lists
Purge obsolete key lists.

Examples

This section provides examples for performing Nessie maintenance.

Compact Global Log

Compacts embedded Nessie's global log file.

Compact Global Log

dremio-admin nessie-maintenance --compact-global-log

Purge Obsolete Key Lists

Purges key-value entries that are no longer used.

Purge Key Lists

dremio-admin nessie-maintenance --purge-key-lists