Amazon Technologies, Inc.

Qu Chen

Kevin Robert McGehee

Gourav Roy

Rajib Dugar

Aseem Cheema

Juan Carlos Gomez

Abhishek Kumar

Suraj Narkhede

Jan Raak

Itay Maoz

Allen Robert Samuels

Ahmed Hesham Salem

A database management system maintains a collection of data using a log-based storage structure. In response to a request to store data items (key-value pairs), the database management system stores mapping information to a data item in an in-memory data structure while the data items are stored on the log-based storage structure. The hash of the key includes information to identify an index entry that comprises information that maps to the location of the data item stored on the log-based storage structure.

Database with in-memory data stores

Data within a database partition that is being migrated may be made available for access. Data within a database partition may be selected for migration. Writes to the selected data may be prevented while the data is being migrated. Writes to other data, or read access any of the partition, may be allowed during the migration of the selected data. Rollback events may be detected for a database partition that is being migrated, halting the further selection of data for migration and deleting the successfully migrated data at the copy of the database partition being created.

Providing access to data within a migrating data partition

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Seattle, WA, United States of America

Qu Chen