Invention Grant
- Patent Title: Distributed transactions with redo-only write-ahead log
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Application No.: US14716834Application Date: 2015-05-19
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Publication No.: US11294864B2Publication Date: 2022-04-05
- Inventor: Wenguang Wang
- Applicant: VMware, Inc.
- Applicant Address: US CA Palo Alto
- Assignee: VMware, Inc.
- Current Assignee: VMware, Inc.
- Current Assignee Address: US CA Palo Alto
- Main IPC: G06F16/00
- IPC: G06F16/00 ; G06F16/17 ; G06F9/455

Abstract:
Examples perform transactions across a distributed system of elements, such as nodes, computing devices, objects, and virtual machines. The elements of the distributed system maintain data (e.g, tables) which include information on transactions previously received and the source of the transactions. A first element of the distributed system transmits a transaction, the identifier (ID) of the first element, and a transaction ID to a plurality of second elements. The second elements compare the transaction ID to the maximum transaction ID associated with the first element and stored in the tables to determine whether the transaction is the most recent and should be performed, or whether the transaction has already been performed and should not be re-performed. In this manner, undo logs are not needed.
Public/Granted literature
- US20160342616A1 DISTRIBUTED TRANSACTIONS WITH REDO-ONLY WRITE-AHEAD LOG Public/Granted day:2016-11-24
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