Protocol for communicating data block copies in an error recovery environment

• US 7,360,113 B2
• Filed: 08/30/2005
• Issued: 04/15/2008
• Est. Priority Date: 08/30/2004
• Status: Active Grant

• Current Assignee: Veritas Technologies, LLC (Whitehouse Group Ltd.)
• Original Assignee: Mendocino Software, Inc.
• Inventors: Woychowski, John P., Anderson, Curtis
• Primary Examiner(s): Beausoliel; Robert
• Assistant Examiner(s): Manoskey; Joseph D
• Application Number:
  US11/216,439
• Publication Number:
  US 20060047932A1
• Time in Patent Office: 959 Days
• Field of Search: 714/4, 714/5, 714/6, 714/42, 714/44
• US Class Current: 714/5.1
• CPC Class Codes: G06F 11/1469 Backup restoration techniques

Abstract

The present invention provides an exemplary system and method for storing information for later recovery. One or more first memory addresses within a recovery storage are assigned to one or more data blocks. One or more second memory addresses within a primary storage associated with the one or more data blocks and the one or more first memory addresses are sent to the recovery server. The one or more data blocks are copied to the one or more first memory addresses within the recovery storage.

Claims

1. A system for storing information for later recovery, the system comprising:

a data interceptor configured to receive a freelist command, the freelist command comprising one or more first memory addresses within a recovery storage medium, send an envelopes command, the envelopes command comprising the one or more first memory addresses and one or more second memory addresses within a primary storage, and a store data command, the store data command comprising an operation to copy one or more data blocks to the one or more first memory addresses;

a recovery server configured to receive the envelopes command; and

a recovery storage comprising the recovery storage medium and configured to receive the store data command.

2. The system recited in claim 1, wherein the recovery server is configured to send a freelist command comprising the one or more first memory addresses to the data interceptor.

3. The system recited in claim 2, wherein the freelist command comprises at least one of a universally unique identifier field, a base of data region of segment field, a length of data region of segment field, a base of metadata region of segment field, a length of metadata region of segment field, a generation stamp field, a segment group number field, and a segment number field.

4. The system recited in claim 1, wherein the store data command also comprises the one or more second memory addresses.

5. The system recited in claim 1, wherein the recovery storage is further configured to receive the envelopes command.

6. The system recited in claim 1, wherein the recovery server is further configured to receive the store data command.

7. The system recited in claim 1, wherein the envelopes command comprises at least one of a segment group number field, a segment number field, an offset in segment field, a timestamp field, a length field, and a sequence number field.

8. The system recited in claim 1, wherein at least one of the one or more first memory addresses is within at least one other recovery storage.

9. The system recited in claim 1, wherein the envelopes command further comprises a flag field configured to identify a region recovery.

10. The system recited in claim 1, wherein the data interceptor is further configured to identify a logical query command that overwrites data within the primary storage.

11. The system recited in claim 1, wherein the data interceptor is further configured to identify a structured query language command that overwrites data within the primary storage.