硬链接的完整备份/还原

backup_restore_full_hardlink.ini

配置硬链接本地备份时，需满足以下要求：

在 [Transmission] 部分下，添加参数 hardLinkLocal：
```
hardLinkLocal = True
```
备份目录必须与数据库数据目录位于相同的文件系统中。
省略加密参数。如果配置文件将加密参数和 hardLinkLocal 参数都设置为 true，则 vbr 会发出警告并忽略加密参数。

; This sample vbr configuration file shows backup and restore using hard-links to data files on each database host for that host's backup.
; Section headings are enclosed by square brackets.
; Comments have leading semicolons (;) or pound signs (#).
; An equal sign separates options and values.
; Specify arguments marked '!!Mandatory!!' explicitly.
; All commented parameters are set to their default value.

; ------------------------------------------- ;
;;; BASIC PARAMETERS ;;;
; ------------------------------------------- ;

[Mapping]
; For each database node there must be one [Mapping] entry to indicate the directory to store the backup.
; !!Mandatory!! Backup host name (no default) and Backup directory (no default).
; node_name = backup_host:backup_dir
; Must use [] for hardlink backups
v_exampledb_node0001 = []:/home/dbadmin/backups
v_exampledb_node0002 = []:/home/dbadmin/backups
v_exampledb_node0003 = []:/home/dbadmin/backups
v_exampledb_node0004 = []:/home/dbadmin/backups

[Misc]
; !!Recommended!! Snapshot name.  Object and full backups should always have different snapshot names.
; Backups with the same snapshotName form a time sequence limited by restorePointLimit.
; Valid characters: a-z A-Z 0-9 - _
; snapshotName = backup_snapshot

[Transmission]
; !!Mandatory!! Identifies the backup as a hardlink style backup.
hardLinkLocal = True
; If copyOnHardLinkFailure is True, when a hard-link local backup cannot create links the data is copied instead.
copyOnHardLinkFailure = False

; ------------------------------------------- ;
;;; ADVANCED PARAMETERS ;;;
; ------------------------------------------- ;

[Database]
; !!Recommended!! If you have more than one database defined on this Vertica cluster, use this parameter to specify which database to backup/restore.
; dbName = current_database

; If this parameter is True, vbr prompts the user for the database password every time.
; If False, specify the location of password config file in 'passwordFile' parameter in [Misc] section.
; dbPromptForPassword = True

[Misc]
; The temp directory location on all database hosts.
; The directory must be readable and writeable by the dbadmin, and must implement POSIX style fcntl lockf locking.
; tempDir = /tmp/vbr

; Full path to the password configuration file
; Store this file in directory readable only by the dbadmin.
; (no default)
; passwordFile =

; Specifies the number of historical backups to retain in addition to the most recent backup.
; 1 current + n historical backups
; restorePointLimit = 1

; When enabled, Vertica confirms that the specified backup locations contain
; sufficient free space and inodes to allow a successful backup. If a backup
; location has insufficient resources, Vertica displays an error message explaining the shortage and
; cancels the backup. If Vertica cannot determine the amount of available space
; or number of inodes in the backupDir, it displays a warning and continues
; with the backup.
; enableFreeSpaceCheck = True

[Database]
; Vertica user name for vbr to connect to the database.
; This setting is rarely needed since dbUser is normally identical to the database administrator.
; dbUser = current_username