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Chen Qian

Chen Qian

Senior Software Engineer, OceanBase

Chen Qian is a senior engineer on OceanBase's transaction-engine team, where he designs and hardens the distributed-transaction that keep thousands of production clusters correct and available. His work spans MVCC, commit and crash-recovery protocols, and LSM-tree storage — including [contributions to MaLT, the framework behind OceanBase's constant-time commits]. He focuses on turning hard concurrency-control problems into mechanisms that are fast, correct, and operable at scale.

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Committing a 1 TB Transaction as Fast as 1 MB — How MaLT Makes Commit, Rollback, and Recovery Constant-Time
ENGINEERING

Committing a 1 TB Transaction as Fast as 1 MB — How MaLT Makes Commit, Rollback, and Recovery Constant-Time

MaLT embeds transaction metadata into LSM-tree, making commit, rollback, and recovery constant-time regardless of size. Bulk import of 2.5M rows speeds up 23.9%; recovery stays under 25s.

Chen Qian
Chen QianJune 24, 2026