Patent attributes
Sending log records from a first system instance's log buffer to a second system instance is disclosed. Both instances may be instances of a database system. A method may create a log record within the buffer. The record contains actual log information, such as descriptions of transactions. A flag corresponding to the record is set in memory other than the buffer. The flag indicates whether the record has been sent to the second instance, and/or whether the second instance has received the record. The method may further embed non-log information within a simulated log record having a format identical to the log record's format. The non-log information, which may not include actual transactions to be committed, is embedded in a body section of the simulated record. At least one otherwise unused bit of a metadata section of the simulated record is set, indicating that the simulated record is simulated.
