GG Useful Commands and Checkpoints

Viewing extract/replicat's read/write position and whether it's in recovery - must be in running:

send xxx status

Whether or not extract/replicat has processed all the records from the source

send xxx logend

Show checkpoint details

info xxx showch

TRANLOGOPTIONS ASMUSER SYS@<ASM_instance>, ASMPASSWORD <password>

使用ASM管理存储时必须加上该命令。 常规的DBUSER也不能省略。

Startup checkpoints: The first checkpoint that is made in the data source when the process starts.

Recovery checkpoints: The position in the data source of the record containing the oldest transaction not yet processed by Extract.

Current checkpoint: The position of the last record read by Extract in the data source. This should match the Log Read Checkpoint statistic shown in the summary and in the basic INFO EXTRACT command without options.

HANDLECOLLISIONS

replicat的参数文件用到，GG将尝试解决重复/丢失记录的问题。