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公开(公告)号：US10331516B2
公开(公告)日：2019-06-25
申请号：US15636454
申请日：2017-06-28
摘要： A method for avoiding recovery and storage of useless data is disclosed. The operations comprise: determining that a subset of data fragments out of a plurality of data fragments have become unavailable, the plurality of data fragments forming a data chunk, wherein the plurality of data fragments are protected by additional redundancy data; determining whether all of data that were stored in the unavailable subset of data fragments when the unavailable subset of data fragments were available would be useless if recovered using remaining available data fragments of the data chunk and the redundancy data; and in response to determining that all of the data that were stored in the unavailable subset of data fragments would be useless if recovered, generating new redundancy data for protecting the remaining available data fragments of the data chunk without recovering the data that were stored in the unavailable subset of data fragments.
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公开(公告)号：US20180181466A1
公开(公告)日：2018-06-28
申请号：US15636454
申请日：2017-06-28
CPC分类号： G06F11/1076 , G06F3/0608 , G06F3/064 , G06F3/067 , H03M13/154 , H03M13/373 , H03M13/3761 , H03M13/616
摘要： One embodiment is related to a method for avoiding recovery and storage of useless data, comprising: determining whether all of one or more unavailable data fragments of a data chunk correspond only to useless data; and in response to determining that all of the one or more unavailable data fragments of the data chunk correspond only to useless data, generating redundancy data for protecting available data fragments of the data chunk without recovering content of the one or more unavailable data fragments.
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公开(公告)号：US10579490B2
公开(公告)日：2020-03-03
申请号：US15636470
申请日：2017-06-28
摘要： One embodiment is related to a method for remote replication recovery, comprising: determining that a damaged data chunk at a first zone of a cloud storage system is not recoverable locally; determining one or more data fragments of the damaged data chunk that are to be recovered with remote replication recovery based on data stored at a second zone and at a third zone of the cloud storage system, wherein the damaged data chunk comprises a plurality of data fragments; recovering the one or more data fragments of the damaged data chunk with remote replication recovery based on the data stored at the second zone and at the third zone of the cloud storage system; and repairing the damaged data chunk with the recovered data fragments at the first zone.
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公开(公告)号：US20180181475A1
公开(公告)日：2018-06-28
申请号：US15636470
申请日：2017-06-28
摘要： One embodiment is related to a method for remote replication recovery, comprising: determining that a damaged data chunk at a first zone of a cloud storage system is not recoverable locally; determining one or more data fragments of the damaged data chunk that are to be recovered with remote replication recovery based on data stored at a second zone and at a third zone of the cloud storage system, wherein the damaged data chunk comprises a plurality of data fragments; recovering the one or more data fragments of the damaged data chunk with remote replication recovery based on the data stored at the second zone and at the third zone of the cloud storage system; and repairing the damaged data chunk with the recovered data fragments at the first zone.
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