Method and system for dirty time logging

• US 20070106869A1
• Filed: 04/19/2006
• Published: 05/10/2007
• Est. Priority Date: 11/04/2005
• Status: Active Grant

• Current Assignee: Oracle America, Inc. (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Moore, William, Bonwick, Jeffrey
• Granted Patent: US 7,925,827 B2
• Time in Patent Office: Days
• US Class Current: 711/170
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0614 Improving the reliability of storage systems
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0683 Plurality of storage devices

Abstract

A method for storing a block in a file system includes attempting to store the block at a location on a disk, where the block is associated with a birth time and is selected from a group consisting of a data block and an indirect block, and updating a dirty time log (DTL) with the birth time if the block is not stored successfully on the disk.

Claims

1. A method for storing a block in a file system, comprising:

attempting to store the block at a location on a disk, wherein the block is associated with a birth time and is one selected from a group consisting of a data block and a first indirect block; and

updating a dirty time log (DTL) with the birth time if the block is not stored successfully on the disk.

2. The method of claim 1, wherein the birth time corresponds to a transaction group associated with an input/output (I/O) request to store the block.

3. The method of claim 1, wherein the first indirect block comprises the birth time of the data block and a location of the data block.

4. The method of claim 1, wherein the first indirect block comprises a birth time of a second indirect block and a location of the second indirect block.

5. The method of claim 1, wherein the DTL is associated with the disk.

6. The method of claim 1, wherein the DTL is associated with a storage pool comprising the disk, and wherein updating the DTL comprises storing the birth time and an identifier of the disk.

7. The method of claim 1, wherein the block is associated with a file in the file system.

8. A system comprising:

a disk configured to store a block, wherein the block is associated with a birth time and is one selected from a data block and a first indirect block;

a storage pool allocator configured to store the block on the disk; and

a dirty time log (DTL) associated with a file system and configured to store the birth time if the block is not stored successfully.

9. The system of claim 8, wherein the birth time corresponds to a transaction group associated with an input/output (I/O) request to store the block.

10. The system of claim 8, wherein the first indirect block comprises the birth time of the data block and a location of the data block.

11. The system of claim 8, wherein the first indirect block comprises a birth time of a second indirect block and a location of the second indirect block.

12. The system of claim 8, wherein the DTL is associated with the disk.

13. The system of claim 8, wherein the DTL is associated with a storage pool comprising the disk, and is further configured to store an identifier of the disk if the block is not stored successfully.

14. The system of claim 8, wherein the block is associated with a file in the file system.

15. A computer readable medium comprising executable instructions for storing a block in a file system by:

attempting to store the block at a location on a disk, wherein the block is associated with a birth time and is one selected from a data block and a first indirect block; and

updating a dirty time log (DTL) with the birth time if the block is not stored successfully on the disk.

16. The computer readable medium of claim 15, wherein the birth time corresponds to a transaction group associated with an input/output (I/O) request to store the block.

17. The computer readable medium of claim 15, wherein the first indirect block comprises the birth time of the data block and a location of the data block.

18. The computer readable medium of claim 15, wherein the first indirect block comprises a birth time of a second indirect block and a location of the second indirect block.

19. The computer readable medium of claim 15, wherein the DTL is associated with the disk.

20. The computer readable medium of claim 15, wherein the DTL is associated with a storage pool comprising the disk, and wherein updating the DTL comprises storing the birth time and an identifier of the disk.