Providing data protection using point-in-time images from multiple types of storage devices

摘要

In one aspect, a method includes receiving a request to restore data of a volume, determining if the data is stored at a first storage device or a second storage device, restoring the data of the volume by using a journal and a first snapshot of the volume stored at the first storage device if the data is stored at the first storage device and restoring the data of the volume by using a second snapshot of the volume stored at the second storage device if the data is stored at the second storage device.

主权项

1. A method comprising:
receiving a user protection policy which determines parameters for snapshots stored at a first storage device and a second storage device; storing, at the first storage device, snapshots of a first volume in accordance with the user protection policy; sending a portion of the snapshots of the first volume from the first storage device to the second storage device in accordance with the user protection policy, wherein the snapshots stored at the second storage device have less granularity than the snapshots stored at the first storage device; receiving a request to restore data of the first volume to a first point-in-time; in response to receiving the request, determining if the data at the first point-in-time is stored at the first storage device or at the second storage device; restoring the data of the first volume at the first point-in-time by using a journal and a first snapshot of the first volume stored at the first storage device if the data is stored at the first storage device; and restoring the data of the first volume at the first point-in-time by using a second snapshot of the volume stored at the second storage device if the data is stored at the second storage device and not stored at the first storage device.