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公开(公告)号：US20180189336A1
公开(公告)日：2018-07-05
申请号：US15877126
申请日：2018-01-22
Applicant: Amazon Technologies, Inc.
CPC classification number: G06F16/219 , G06F12/12 , G06F16/172 , G06F16/182 , G06F16/1873
Abstract: A distributed storage system may store data object instances in persistent storage and may cache keymap information for those data object instances. The system may cache a latest symbolic key entry for some user keys of the data object instances. When a request is made for the latest version of stored data object instances having a specified user key, the latest version may be determined dependent on whether a latest symbolic key entry exists for the specified user key, and keymap information for the latest version may be returned. When storing keymap information, a flag may be set to indicate that a corresponding latest symbolic key entry should be updated. The system may delete a latest symbolic key entry for a particular user key from the cache in response to determining that no other requests involving the keymap information for data object instances having the particular user key are pending.
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公开(公告)号：US09928247B2
公开(公告)日：2018-03-27
申请号：US14727651
申请日：2015-06-01
Applicant: Amazon Technologies, Inc.
CPC classification number: G06F17/3015 , G06F11/1448 , G06F17/30117 , G06F17/3023
Abstract: Systems and methods for providing object versioning in a storage system may support the logical deletion of stored objects through the use of delete marker objects. In response to a delete operation specifying a key, but not a version identifier, the storage system may create a delete marker object that is stored as the latest object version of the key. In response to performing a subsequent mutating operation, or at pre-determined time intervals, the storage system may perform a local and/or a global analysis of the delete marker objects stored in the system (and/or metadata associated with those delete marker objects) to determine whether any of them are no longer needed to ensure correct operation of the system. The analysis may apply one or more reap conditions to delete marker objects and/or metadata to identify extraneous delete marker objects, removing those that meet one or more reap conditions from storage.
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公开(公告)号：US09875262B2
公开(公告)日：2018-01-23
申请号：US14733897
申请日：2015-06-08
Applicant: Amazon Technologies, Inc.
CPC classification number: G06F17/30309 , G06F12/12 , G06F17/30132 , G06F17/30194 , G06F17/3023
Abstract: A distributed storage system may store data object instances in persistent storage and may cache keymap information for those data object instances. The system may cache a latest symbolic key entry for some user keys of the data object instances. When a request is made for the latest version of stored data object instances having a specified user key, the latest version may be determined dependent on whether a latest symbolic key entry exists for the specified user key, and keymap information for the latest version may be returned. When storing keymap information, a flag may be set to indicate that a corresponding latest symbolic key entry should be updated. The system may delete a latest symbolic key entry for a particular user key from the cache in response to determining that no other requests involving the keymap information for data object instances having the particular user key are pending.
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公开(公告)号：US20160124870A1
公开(公告)日：2016-05-05
申请号：US14992915
申请日：2016-01-11
Applicant: Amazon Technologies, Inc.
IPC: G06F12/14
CPC classification number: G06F12/1466 , G06F3/0608 , G06F3/0619 , G06F3/0622 , G06F3/0652 , G06F3/067 , G06F3/0671 , G06F3/0673 , G06F11/1435 , G06F11/1453 , G06F17/30117 , G06F17/3023 , G06F17/30356 , G06F2201/80 , G06F2201/84 , G06F2212/1052
Abstract: Systems and methods for providing object versioning in a storage system may support the logical deletion of stored objects. In response to a delete operation specifying both a user key and a version identifier, the storage system may permanently delete the specified version of an object having the specified key. In response to a delete operation specifying a user key, but not a version identifier, the storage system may create a delete marker object that does not contain object data, and may generate a new version identifier for the delete marker. The delete marker may be stored as the latest object version of the user key, and may be addressable in the storage system using a composite key comprising the user key and the new version identifier. Subsequent attempts to retrieve the user key without specifying a version identifier may return an error, although the object was not actually deleted.
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