Amazon Technologies, Inc.

James Alexander Bornholt

Andrew Kent Warfield

Seth William Markle

Munif M Farhan

Keun Soo Jo

Andrew Christopher Schleit

Thomas Grant Slatton

Rajeev Joshi

An object storage data store may be implemented using storage devices providing multiple extents, where individual ones of the extents include multiple independently addressable, contiguous blocks and where updating an extent is performed by updating the respective independently addressable, contiguous blocks sequentially using a series of write operations. The storage devices may include shingled magnetic recording devices and may include conventional persistent storage devices. The key value data store may implement a superblock structure, index structure, and data store structure using respective portions of the multiple extents, where updates to each of the structures is performed sequentially using a series of write operations. The key value data store may further implement a cache for the index structure to minimize input-output (IO) density of the object storage data store.

Persistent object storage with sequential updates

Technologies are provided for supporting storage device write barriers. A host computer can be configured to transmit a write barrier command to a storage device to indicate that one or more data access commands should be processed before one or more other data access commands are processed. For example, a host computer can transmit one or more data access commands to a storage device. The host computer can then transmit a write barrier command to the storage device. The storage device can be configured to receive the write barrier command and to associate a write barrier with the one or more data access commands. The host computer can continue to transmit additional data access commands to the storage device. However, the storage device will not process the additional data access commands until after the one or more data access commands associated with the write barrier have been processed.

Storage device write barriers

Technologies are provided for supporting storage device write barriers. A storage device can be configured to associate a data access command with a write barrier. The write barrier can be used to indicate that one or more data access commands should be processed before one or more other data access commands are processed. For example, a host computer can transmit one or more data access commands to a storage device. The storage device can determine that the one or more data access commands are associated with a write barrier. The host computer can continue to transmit additional data access commands to the storage device. However, the storage device will not process the additional data access commands until after the one or more data access commands associated with the write barrier have been processed.

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James Alexander Bornholt