使用增量备份¶

创建和使用增量备份¶

1. 创建您第一个增量备份

   使用：命令’ trove backup-create ‘ 并且指定：

   • 您正在进行增量备份的数据库实例的``INSTANCE_ID``， (比如, 792a6a56-278f-4a01-9997-d997fa126370)
   • 你正在创建增量备份的名字: backup1.1
   • 父备份的’BACKUP_ID’。即然这样，标识编码为‘6dc3a9b7-1f3e-4954-8582-3f2e4942cddd’的父备份是常规备份。

   $ trove backup-create INSTANCE_ID backup1.1  --parent BACKUP_ID
   
   +-------------+--------------------------------------+
   |   Property  |                Value                 |
   +-------------+--------------------------------------+
   |   created   |         2014-03-19T14:09:13          |
   | description |                 None                 |
   |      id     | 1d474981-a006-4f62-b25f-43d7b8a7097e |
   | instance_id | 792a6a56-278f-4a01-9997-d997fa126370 |
   | locationRef |                 None                 |
   |     name    |              backup1.1               |
   |  parent_id  | 6dc3a9b7-1f3e-4954-8582-3f2e4942cddd |
   |     size    |                 None                 |
   |    status   |                 NEW                  |
   |   updated   |         2014-03-19T14:09:13          |
   +-------------+--------------------------------------+
   

   注意，这个命令返回的包括你逐步创建的数据库实例的备份标识编码（instance——id）以及你刚新创建的增量备份器的标识编码（id）

2. 创建您的第二个增量备份

   第二个增量备份的名字``backup1.2``。此时，当您指定父节点，传递您上一个步骤刚创建增量(backup1.1)备份ID。在这个例子中，它是``1d474981-a006-4f62-b25f-43d7b8a7097e``.

   $ trove backup-create INSTANCE_ID  backup1.2  --parent BACKUP_ID
   
   +-------------+--------------------------------------+
   |   Property  |                Value                 |
   +-------------+--------------------------------------+
   |   created   |         2014-03-19T14:09:13          |
   | description |                 None                 |
   |      id     | bb84a240-668e-49b5-861e-6a98b67e7a1f |
   | instance_id | 792a6a56-278f-4a01-9997-d997fa126370 |
   | locationRef |                 None                 |
   |     name    |              backup1.2               |
   |  parent_id  | 1d474981-a006-4f62-b25f-43d7b8a7097e |
   |     size    |                 None                 |
   |    status   |                 NEW                  |
   |   updated   |         2014-03-19T14:09:13          |
   +-------------+--------------------------------------+
   

3. 使用增量备份恢复

   现在假设您的``guest1``数据库实例被销毁了，您需要从增量备份中恢复过来。在这个例子中，您使用命令:trove create`创建一个新的数据库实例``guest2`.

   To incorporate your incremental backups, you simply use the –backup` parameter to pass in the BACKUP_ID of your most recent incremental backup. The Database service handles the complexities of applying the chain of all previous incremental backups.

   $ trove create guest2 10 --size 1 --backup BACKUP_ID
   
   +-------------------+-----------------------------------------------------------+
   |      Property     |                       Value                               |
   +-------------------+-----------------------------------------------------------+
   |      created      |                  2014-03-19T14:10:56                      |
   |     datastore     |         {u'version': u'mysql-5.5', u'type': u'mysql'}     |
   | datastore_version |                      mysql-5.5                            |
   |       flavor      | {u'id': u'10', u'links':                                  |
   |                   | [{u'href': u'https://10.125.1.135:8779/v1.0/              |
   |                   |  626734041baa4254ae316de52a20b390/flavors/10', u'rel':    |
   |                   |  u'self'}, {u'href': u'https://10.125.1.135:8779/         |
   |                   |  flavors/10', u'rel': u'bookmark'}]}                      |
   |         id        |         a3680953-eea9-4cf2-918b-5b8e49d7e1b3              |
   |        name       |                      guest2                               |
   |       status      |                      BUILD                                |
   |      updated      |                  2014-03-19T14:10:56                      |
   |       volume      |                   {u'size': 1}                            |
   +-------------------+-----------------------------------------------------------+