Alibaba Group Holding Limited

Gui Huang

Zhenkun Yang

Dengcheng He

Canfang Shang

A data processing method including: acquiring information of multiple first data blocks of a first level to be merged and information of multiple second data blocks of a second level to be merged, wherein each of the first data blocks of the first level has the same first size, and each of the second data blocks of the second level has the same second size; performing, according to the information of the multiple first data blocks and the information of the multiple second data blocks, data comparison on each of the first data blocks and each of the second data blocks; and performing, according to a comparison result, data compaction on the first level and the second level. The embodiments of the present disclosure effectively reduce system overheads caused by I/O data read and write and data comparison, thereby improving the system throughput.

Data processing method, apparatus, electronic device, and computer storage medium

The present application describes techniques for managing primary and secondary databases. One example method includes determining whether a lock held by a primary database expires, wherein the primary database and the secondary databases share the lock; in response to determining that the lock held by the primary database has expired, determining whether a lock renewal request of the primary database has been received; and in response to determining that the lock renewal request of the primary database has not been received, selecting a particular secondary database from the secondary databases as a new primary database, and controlling the primary database to be switched to the particular secondary database.

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Hanzghou, China

Gui Huang