SYSTEMS, METHODS, AND COMPUTER PROGRAM PRODUCTS PROVIDING AN ELASTIC SNAPSHOT REPOSITORY

摘要

A system, method, and computer program product for the provision of an elastic snapshot repository is disclosed. A snapshot repository with a particular size stores snapshot images. As the used capacity of the snapshot repository exceeds a predetermined threshold, another volume is added from a pool of available volumes. When the used capacity of the snapshot repository is at, or falls below, a lower threshold, a second snapshot repository is created. The schedule associated with the first snapshot repository is transferred to the second snapshot repository. The snapshot images in the first snapshot repository remain available to meet a minimum history requirement. New snapshot images are stored to the second snapshot repository until there are enough snapshot images in the second snapshot repository, alone, to meet the minimum history requirement. The first snapshot repository is deleted in response and the associated volumes released to the pool.

主权项

1. A method, comprising:
storing a snapshot image of a base volume to a first repository volume in a snapshot repository, the snapshot repository being configured to maintain a minimum number of snapshot images according to a pre-determined history amount; detecting, in response to storage of the snapshot image, that a used capacity of the snapshot repository has exceeded an upper threshold of available space in the snapshot repository; and concatenating, in response to the detecting, a second repository volume from a pool of available repository volumes to the first repository volume in the snapshot repository.