×

Method of optimizing the space and improving the write performance of volumes with multiple virtual copies

  • US 6,996,687 B1
  • Filed: 12/20/2002
  • Issued: 02/07/2006
  • Est. Priority Date: 12/20/2002
  • Status: Expired due to Term
First Claim
Patent Images

1. A computer readable medium comprising instructions executable by a computer system, wherein the computer system implements a method in response to executing the instructions, the method comprising:

  • creating a primary data volume;

    creating a first virtual copy of the primary data volume;

    modifying first data of the primary data volume after creation of the first virtual copy thereof;

    creating a second virtual copy of the primary data volume after modification of the first data thereof;

    generating a write-data transaction for modifying second data of the primary data volume, wherein the write-data transaction is generated after creation of the second virtual copy;

    copying the second data of the primary data volume to memory allocated to store data of the second virtual copy;

    modifying the second data of the primary data volume after the second data is copied to the memory allocated to store data of the second virtual copy;

    copying a third virtual copy of the primary data volume after modification of the second data thereof;

    wherein, before the second data of the primary volume is modified, the second data is copied only to the memory allocated to store data of the second virtual copy.

View all claims
  • 9 Assignments
Timeline View
Assignment View
    ×
    ×