Fast database failover

Details Fast database failover Fast database failover

1997-07-25

1999-09-14

Hua, Ly V.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

714 6, 714 11, 714 13, 714 20, G06F 1300

Patent

active

059516950

ABSTRACT:
A database system facilitates quick failover. The database system includes a primary node, a standby node and a fast interconnect between the primary node and the standby node. The primary node includes a primary buffer pool which stores pages of the database information, and a log storage which receives a log of updates for the pages within the primary buffer pool. When a page is to be updated by a primary node, the primary node sends a copy of a before update image of the page to the standby node. When the primary log writes logs of updates to the log storage, the primary node also forwards the logs of updates to the standby node.

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