US 2026/0219911 A1 · EXTENDING UNCHANGED REGIONS OF FILESYSTEM RECIPES CONSTRAINED BY FIXED CHANGED BLOCK TRACKING (CBT) GRANULARITY

Abstract

Optimizing filesystem recipes for VM backups using variable size segmenting (VSS) by identifying a region of a VM to be copied having an unchanged data area bounded by left and right regions of real changed data. A changed block tracking (CBT) process marks a CBT region as changed data, but this area is greater than the regions of real changed data. A process identifies areas within respective CBT regions that have unchanged data but that is marked as changed data by the CBT process. It extends a recipe specifying unchanged data of a base file for replication to include the identified areas so as to prevent replication of data that is actually unchanged but marked as changed by the CBT process.

Claims20

Dependent claims

A computer-implemented method of optimizing a filesystem recipe for virtual machine (VM) backups using variable size segmenting (VSS), comprising:

identifying a region of a VM to be copied having an unchanged data area bounded by left and right regions of real changed data;
applying a changed block tracking (CBT) process to mark a CBT region as changed data, wherein the regions of real changed data are subsets of respective CBT regions;
identifying areas within the respective CBT regions that have unchanged data that is marked as changed data by the CBT process;
and
extending a recipe specifying unchanged data of a base file for replication to include the identified areas so as to prevent replication of data that is actually unchanged but marked as changed by the CBT process.

2 more elements

A computer-implemented method of optimizing a filesystem recipe for virtual machine (VM) backups using variable size segmenting (VSS), comprising:

generating a recipe to copy a region of a VM having a unchanged data area bounded by regions of real changed data, wherein the region comprises a plurality of segments and the changed data is detected and marked by a changed block tracking (CBT) process that defines a changed data region as a superset of a real changed data region;
copying the VM from an original VM to a copied VM using a deduplication backup program that produces fingerprints for each segment by hashing data in each respective segment;
performing a fingerprint comparison to first identify areas within the changed data region that have unchanged data;
and
first extending the recipe to include the first identified areas in an extended recipe.

2 more elements

A system optimizing a filesystem recipe for virtual machine (VM) backups using variable size segmenting (VSS), comprising:

a first component generating a recipe to copy a region of a VM having a unchanged data area bounded by regions of real changed data, wherein the region comprises a plurality of segments and the changed data is detected and marked by a changed block tracking (CBT) processing component that defines a changed data region as a superset of a real changed data region;
a deduplication backup server copying the VM from an original VM to a copied VM using a backup process that produces fingerprints for each segment by hashing data in each respective segment;
a second component performing a fingerprint comparison to first identify areas within the changed data region that have unchanged data, and first extending the recipe to include the first identified areas in an extended recipe.

Dependencies are inferred from the claim text.

Extending unchanged regions of filesystem recipes constrained by fixed changed block tracking (cbt) granularity

Life of this patent

Extending unchanged regions of filesystem recipes constrained by fixed changed block tracking (cbt) granularity

Life of this patent

Abstract

Claims20