system_tablet_backup_config

The system tablet backup mechanism provides incremental copying of cluster metadata — such as Hive, BSController, and SchemeShard — to the local file system of cluster hosts. The backup behavior is configured in the system_tablet_backup_config section of the YDB configuration.

Syntax

system_tablet_backup_config:
    filesystem:
        path: "/path/to/backup/directory"
    exclude_tablet_ids:
        - 72057594037968897
    max_backups_limit: 3

Parameters

Parameter	Default value	Description
`filesystem.path`	—	Absolute path to a directory on the host's local file system for storing backups. The directory must be writable by the YDB process on each host where system tablets run. Only local file systems are supported; network file systems such as NFS are not supported.
`exclude_tablet_ids`	—	List of system tablet identifiers to exclude from backup, for example, to reduce disk load or save space.
`max_backups_limit`	`3`	Maximum number of backups of a single tablet stored on the host. After a new copy is successfully created, the oldest one is automatically deleted when the limit is exceeded.

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