US 2026/0099409 A1Published application

Capturing snapshots in a storage system

AssigneeHewlett Packard Enterprise Development LP

InventorsXiali He, Matthew S. Gates, Alex Veprinsky, Lee L. Nelson, Monica Jane Kinney

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Abstract

Example implementations relate to operations in a storage system. An example implementation includes receiving a write of a first data unit to a first address in a volume, and populating a first volume entry, in a base volume table, with a reference to a first version table. The example implementation also includes, in response to detecting a snapshot trigger event, generating a first snapshot table and a second version table, where the first snapshot table is a copy of the base volume table. The example implementation also includes, subsequent to generating the first snapshot table, receiving a write of a second data unit to a second address in the volume, and populating a second volume entry, in the base volume table, with a reference to a second version table.

Claims20

Dependent claims

A computing device comprising:

a processor;
a memory;
and
a machine-readable storage storing instructions, the instructions executable by the processor to:
receive a write of a first data unit to a first logical address in a volume;
in response to a receipt of the write of the first data unit, populate a first base entry, in a base table, with a reference to a first version table, wherein the base table comprises a plurality of base entries that are indexed to different logical addresses of the volume, and wherein the first version table comprises a first plurality of version entries that are indexed to different logical addresses of the volume;
in response to a detection of a snapshot trigger event, generate a first snapshot table and a second version table, wherein the first snapshot table is a copy of the base table;
subsequent to a generating the first snapshot table, receive a write of a second data unit to a second logical address in the volume;
and
in response to receiving the write of the second data unit, populate a second base entry, in the base table, with a reference to the second version table.

7 more elements

A non-transitory machine-readable medium storing instructions that upon execution cause a processor to:

receive a write of a first data unit to a first logical address in a volume;
in response to a receipt of the write of the first data unit, populate a first base entry, in a base table, with a reference to a first version table, wherein the base table comprises a plurality of base entries that are indexed to different logical addresses of the volume, and wherein the first version table comprises a first plurality of version entries that are indexed to different logical addresses of the volume;
in response to a detection of a snapshot trigger event, generate a first snapshot table and a second version table, wherein the first snapshot table is a copy of the base table;
subsequent to a generating the first snapshot table, receive a write of a second data unit to a second logical address in the volume;
and
in response to receiving the write of the second data unit, populate a second base entry, in the base table, with a reference to the second version table.

3 more elements

Dependencies are inferred from the claim text.