docs/interop/bitmaps.rst

14 incremental or differential backup regimens.
46 QEMU uses these bitmaps when making incremental backups to know which sections
276 - An incremental backup created from an empty bitmap will copy no data, as if
497 #. At a later point, issue incremental backups from ``bitmap0``.
500 incremental backups made from this point forward would be correctly aligned to
503 This is not particularly useful if we decide we want to start incremental
513 #. At a later point, issue incremental backups from ``bitmap0``.
516           drive backup, incremental backups can still be authored from this
539 from the point in time at which the incremental backup was issued.
544 full and incremental backups.
554 create a new incremental backup chain attached to a drive.
722 #. Create a destination image for the incremental backup that utilizes the
725    - Let's assume the new incremental image is named ``drive0.inc0.qcow2``:
750 #. Issue an incremental backup command:
760            "sync": "incremental"
785 reflect the "incremental" backup regimen, which only copies out new changes
786 from each incremental backup.
792           that the next incremental backup can copy them out.
797 #. Create a new destination image for the incremental backup that points to
823 #. Issue a new incremental backup command. The only difference here is that we
834            "sync": "incremental"
856 Because the first incremental backup from the previous example completed
858 we use ``bitmap0`` again to create a new incremental backup that targets the
869 Each new incremental backup re-synchronizes the bitmap to the latest backup
920 #. Issue a new incremental backup command. Apart from the new destination
931            "sync": "incremental"
1088 #. Later, create new destination images for each of the incremental backups
1130 #. Issue a multi-drive incremental push backup transaction:
1143                  "sync": "incremental",
1152                  "sync": "incremental",
1209 against is kept at the issuance of the last successful incremental backup,
1213 on the destination), the incremental backup command can be retried with the
1247 #. Attempt to create an incremental backup via QMP:
1257            "sync": "incremental"
1340            "sync": "incremental"
1381 to delete any incremental backups that were created successfully in this
1400                "sync": "incremental",
1409                "sync": "incremental",
1470 deleted. If a VM-wide incremental backup of all drives at a point-in-time is
1472 account that a new incremental backup for drive0 needs to be based on top of
1475 For this example, an incremental backup for ``drive0`` was created, but not
1484 To repair this, issue a new incremental backup across both drives. The result
1507 Regardless of if a participating incremental backup job failed or was
1515 #. Issue the multi-drive incremental backup transaction:
1531                "sync": "incremental",
1540                "sync": "incremental",