128 lines
5.9 KiB
ReStructuredText
128 lines
5.9 KiB
ReStructuredText
=======================
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Use incremental backups
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=======================
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Incremental backups let you chain together a series of backups. You
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start with a regular backup. Then, when you want to create a subsequent
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incremental backup, you specify the parent backup.
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Restoring a database instance from an incremental backup is the same as
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creating a database instance from a regular backup—the Database service
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handles the complexities of applying the chain of incremental backups.
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This example shows you how to use incremental backups with a MySQL
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database.
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**Assumptions.** Assume that you have created a regular
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backup for the following database instance:
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- Instance name: ``guest1``
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- ID of the instance (``INSTANCE_ID``):
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``792a6a56-278f-4a01-9997-d997fa126370``
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- ID of the regular backup artifact (``BACKUP_ID``):
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``6dc3a9b7-1f3e-4954-8582-3f2e4942cddd``
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Create and use incremental backups
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#. **Create your first incremental backup**
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Use the :command:`trove backup-create` command and specify:
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- The ``INSTANCE_ID`` of the database instance you are doing the
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incremental backup for (in this example,
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``792a6a56-278f-4a01-9997-d997fa126370``)
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- The name of the incremental backup you are creating: ``backup1.1``
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- The ``BACKUP_ID`` of the parent backup. In this case, the parent
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is the regular backup, with an ID of
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``6dc3a9b7-1f3e-4954-8582-3f2e4942cddd``
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.. code-block:: console
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$ trove backup-create INSTANCE_ID backup1.1 --parent BACKUP_ID
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+-------------+--------------------------------------+
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| Property | Value |
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+-------------+--------------------------------------+
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| created | 2014-03-19T14:09:13 |
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| description | None |
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| id | 1d474981-a006-4f62-b25f-43d7b8a7097e |
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| instance_id | 792a6a56-278f-4a01-9997-d997fa126370 |
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| locationRef | None |
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| name | backup1.1 |
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| parent_id | 6dc3a9b7-1f3e-4954-8582-3f2e4942cddd |
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| size | None |
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| status | NEW |
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| updated | 2014-03-19T14:09:13 |
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+-------------+--------------------------------------+
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Note that this command returns both the ID of the database instance
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you are incrementally backing up (``instance_id``) and a new ID for
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the new incremental backup artifact you just created (``id``).
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#. **Create your second incremental backup**
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The name of your second incremental backup is ``backup1.2``. This
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time, when you specify the parent, pass in the ID of the incremental
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backup you just created in the previous step (``backup1.1``). In this
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example, it is ``1d474981-a006-4f62-b25f-43d7b8a7097e``.
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.. code-block:: console
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$ trove backup-create INSTANCE_ID backup1.2 --parent BACKUP_ID
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+-------------+--------------------------------------+
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| Property | Value |
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+-------------+--------------------------------------+
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| created | 2014-03-19T14:09:13 |
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| description | None |
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| id | bb84a240-668e-49b5-861e-6a98b67e7a1f |
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| instance_id | 792a6a56-278f-4a01-9997-d997fa126370 |
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| locationRef | None |
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| name | backup1.2 |
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| parent_id | 1d474981-a006-4f62-b25f-43d7b8a7097e |
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| size | None |
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| status | NEW |
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| updated | 2014-03-19T14:09:13 |
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+-------------+--------------------------------------+
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#. **Restore using incremental backups**
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Now assume that your ``guest1`` database instance is damaged and you
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need to restore it from your incremental backups. In this example,
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you use the :command:`trove create` command to create a new database
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instance called ``guest2``.
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To incorporate your incremental backups, you simply use the
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:option:`--backup` parameter to pass in the ``BACKUP_ID`` of your most
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recent incremental backup. The Database service handles the
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complexities of applying the chain of all previous incremental
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backups.
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.. code-block:: console
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$ trove create guest2 10 --size 1 --backup BACKUP_ID
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+-------------------+-----------------------------------------------------------+
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| Property | Value |
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+-------------------+-----------------------------------------------------------+
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| created | 2014-03-19T14:10:56 |
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| datastore | {u'version': u'mysql-5.5', u'type': u'mysql'} |
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| datastore_version | mysql-5.5 |
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| flavor | {u'id': u'10', u'links': |
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| | [{u'href': u'https://10.125.1.135:8779/v1.0/ |
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| | 626734041baa4254ae316de52a20b390/flavors/10', u'rel': |
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| | u'self'}, {u'href': u'https://10.125.1.135:8779/ |
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| | flavors/10', u'rel': u'bookmark'}]} |
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| id | a3680953-eea9-4cf2-918b-5b8e49d7e1b3 |
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| name | guest2 |
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| status | BUILD |
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| updated | 2014-03-19T14:10:56 |
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| volume | {u'size': 1} |
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+-------------------+-----------------------------------------------------------+
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