GGSCI????LAG?? ????????????????Oracle?redo????online redo logfile? ? Replicat????????????????? ????????
????,?????????????????LAG; ????????????????REPLICAT??apply???????????? OGG????RANGE??????????,????????REPLICATE??APPLY? OGG??MAXTRANSOPS????????
LAG?????????:
?Extract?????redolog????TRAIL?REMOTE HOST
????datapump???extract trail????????????REMOTE HOST
?collector?????????????????LOCAL TRAIL
?REPLICAT??LOCAL TRAIL????????
?????????GGSCI?INFO?STATUS??????LAG,???SEND ???,LAG?????LAG?????:
INFO??????LAG???SEND???????????
INFO?????LAG???MANAGER????????checkpoint
SEND <OBJECT>, lag???LAG???<OBJECT>????????????
LAG?????????????????Kilobytes???
????LAG??? ????????????? ? EXTRACT/PUMP/REPLICAT???????? ?2?????????, ???? LAG???EXTRACT???????
??EXTRACT/PUMP/REPLICAT??????????????? REAL TIME,???LAG????? ?????????????? ????????REDO LOG?????????,?LAG???ER???????,??????????????
??????,STOP EXTRACT?????????????????LAG,????EXTRACT?????,??EXTRACT????????? ????REDO LOG???? ?EXTRACT???????????????????
GGSCI (XIANGBLI-CN) 27> stop load2
Sending STOP request to EXTRACT LOAD2 …
Request processed.
GGSCI (XIANGBLI-CN) 28> start load2
Sending START request to MANAGER …
EXTRACT LOAD2 starting
GGSCI (XIANGBLI-CN) 31> info load2
EXTRACT LOAD2 Last Started 2012-09-18 20:26 Status RUNNING
Checkpoint Lag 00:04:34 (updated 00:00:08 ago)
Log Read Checkpoint Oracle Redo Logs
2012-09-18 20:21:32 Seqno 44, RBA 13750272
SCN 0.1845479 (1845479)
GGSCI (XIANGBLI-CN) 35> lag load2
Sending GETLAG request to EXTRACT LOAD2 …
Last record lag: 130 seconds.
At EOF, no more records to process.
GGSCI (XIANGBLI-CN) 36> info load2
EXTRACT LOAD2 Last Started 2012-09-18 20:26 Status RUNNING
Checkpoint Lag 00:00:00 (updated 00:00:02 ago)
Log Read Checkpoint Oracle Redo Logs
2012-09-18 20:27:33 Seqno 44, RBA 13817856
SCN 0.1845671 (1845671)
?????? Last record lag ? Checkpoint Lag ????
EXTRACT/PUMP/REPLICAT ?????????????(catch up), ???? ?????????????GB?redo???,??????EXTRACT/PUMP/REPLICAT ?????????
???INFO?LAG???checkpoint?,????????????Long Running Transactions (LRTs),??????????COMMIT? ????????????????????????COMMIT?????? ????EXTRACT/PUMP/REPLICAT???????????????????????commit????? ??REPLICAT????MAXTRANSOPS ?????LAG?