DISTRIBUTED STORAGE ARRAY
First Claim
1. A method for asynchronous backup of virtual disks in a distributed storage array;
- comprising;
receiving an IO stream at the virtual disks in the distributed storage array;
writing data to one or more storage cells of the virtual disks in the distributed storage array, and logging completed writes in a first batch for each of the one or more storage cells;
establishing a consistency point in the IO stream;
terminating logging to the first batch for each of the one or more storage cells at the consistency point and logging completed writes after the consistency point to a new batch for each of the one or more storage cells; and
transferring writes logged in the first batch to at least one remote storage so that the at least one remote storage is crash consistent.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for asynchronous backup of virtual disks in a distributed storage array are disclosed. An exemplary method may comprise receiving an IO stream at the virtual disks in the distributed storage array, writing data to one or more storage cells of the virtual disks in the distributed storage array, and logging completed writes in a first batch for each of the one or more storage cells. The method also comprises establishing a consistency point in the IO stream, terminating logging to the first batch for each of the one or more storage cells at the consistency point and logging completed writes after the consistency point to a new batch for each of the one or more storage cells. The method also comprises transferring writes logged in the first batch to at least one remote storage so that the at least one remote storage is crash consistent.
33 Citations
21 Claims
-
1. A method for asynchronous backup of virtual disks in a distributed storage array;
- comprising;
receiving an IO stream at the virtual disks in the distributed storage array; writing data to one or more storage cells of the virtual disks in the distributed storage array, and logging completed writes in a first batch for each of the one or more storage cells; establishing a consistency point in the IO stream; terminating logging to the first batch for each of the one or more storage cells at the consistency point and logging completed writes after the consistency point to a new batch for each of the one or more storage cells; and transferring writes logged in the first batch to at least one remote storage so that the at least one remote storage is crash consistent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- comprising;
-
12. A system comprising:
-
a distributed storage array having a plurality of storage cells; a logging service operatively associated with the plurality of storage cells, the logging service; logging completed writes in a first batch for each of the storage cells, establishing a consistency point for terminating logging to the first batch, and logging completed writes for each of the one or more storage cells after the consistency point to a new batch; and a remote storage for recording writes logged in the first batch such that the remote storage is a mirror image of the plurality of storage cells as of the consistency point. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
-
19. A distributed storage array with asynchronous backup, comprising:
-
first hatch means for logging completed writes for each of a plurality of storage cells; means for terminating logging by the first batch means at a consistency point; second batch means for logging completed writes after the consistency point; and means for transferring the completed writes by the first batch means to a remote storage for maintaining a mirror image of the plurality of storage cells consistent to the consistency point. - View Dependent Claims (20)
-
-
21. A system comprising:
a logging service for operatively associating with a plurality of storage cells in a distributed storage array, the logging service comprising program code for; logging completed writes in a first batch for each of the storage cells, establishing a consistency point for terminating logging to the first batch, logging completed writes for each of the one or more storage cells after the consistency point to a new batch, and causing writes leased in the first batch to be sent to a remote storage for recording on the remote storage such that the remote storage is a mirror image of the plurality of storage cells as of the consistency point.
Specification