METHOD AND APPARATUS FOR FAST GENERATING A FULL SNAPSHOT, ELECTRONIC DEVICE AND STORAGE MEDIUM
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United States of America
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Issued Date -
Mar 13, 2025
app pub date -
Feb 22, 2023
filing date -
Feb 22, 2023
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Abstract
A method and apparatus for fast generating a full snapshot, an electronic device and a storage medium. The method includes the following: creating a source data volume and allocating a first-level data pointer table, where the first-level data pointer table records location information of multiple second-level data pointer tables; when data is written into the source data volume, determining, according to a written data offset, whether a target second-level data pointer table in which the written data is located exists and is valid; in response to determining that the target second-level data pointer table exist and is valid, writing the data into the source data volume and recording a write location of the data in the target second-level data pointer table; and when a snapshot is created, copying the first-level data pointer table as a first-level data pointer table for the snapshot.
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