編輯:關於android開發
- SQL> col BANNER for a90
- SQL> select * from v$version;
- BANNER CON_ID
- ------------------------------------------------------------------------------------------ ----------
- Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production 0
- PL/SQL Release 12.1.0.2.0 - Production 0
- CORE 12.1.0.2.0 Production 0
- TNS for Linux: Version 12.1.0.2.0 - Production 0
- NLSRTL Version 12.1.0.2.0 - Production 0
- primary:
- alter system set log_archive_dest_2='';
- alter system set log_archive_dest_3='';
- fay sync:
- alter system set log_archive_dest_2='';
- standby:
- alter system set log_archive_dest_2='';
- alter system set log_archive_dest_3='';
- DGMGRL> create configuration dg12c_broker as primary database is dg12cpy connect identifier is xxxx;
- Error: ORA-16698: LOG_ARCHIVE_DEST_n parameter set for object to be added
- Failed.
- 錯誤說明:
- dg12c@dgpy /home/oracle$ oerr ora 16649
- 16649, 0000, "possible failover to another database prevents this database from being opened"
- // *Cause: An attempt to open the primary database was made either after
- // a failover occurred, or when it was likely to have occurred as
- // the result of the primary being isolated from the fast-start
- // failover target standby database and from the fast-start failover
- // observer.
- // *Action: Check if a failover did occur. If fast-start failover is enabled,
- // and a failover did not occur, ensure that connectivity exists
- // between the primary database and either the observer or the
- // target standby database. Then, try opening the database again.
- SQL> alter system set dg_broker_start=true scope=both;
- DGMGRL> create configuration dg12c_broker as primary database is dg12cpy connect identifier is dg12cpy;
- Configuration "dg12c_broker" created with primary database "dg12cpy"
- DGMGRL> add database dg12csd as connect identifier is dg12csd maintained as physical;
- Database "dg12csd" added
- DGMGRL> enable configuration
- Enabled.
- DGMGRL> show configuration
- Configuration - dg12c_broker
- Protection Mode: MaxPerformance
- Members:
- dg12cpy - Primary database
- dg12csd - Physical standby database
- Fast-Start Failover: DISABLED
- Configuration Status:
- SUCCESS (status updated 20 seconds ago)
- DGMGRL> show database verbose 'dg12csd'
- Database - dg12csd
- Role: PHYSICAL STANDBY
- Intended State: APPLY-ON
- Transport Lag: 0 seconds (computed 1 second ago)
- Apply Lag: 0 seconds (computed 1 second ago)
- Average Apply Rate: 20.00 KByte/s
- Active Apply Rate: 1.05 MByte/s
- Maximum Apply Rate: 3.18 MByte/s
- Real Time Query: ON
- Instance(s):
- dg12c
- Properties:
- DGConnectIdentifier = 'dg12csd'
- ObserverConnectIdentifier = ''
- LogXptMode = 'ASYNC'
- RedoRoutes = ''
- DelayMins = '0'
- Binding = 'optional'
- MaxFailure = '0'
- MaxConnections = '1'
- ReopenSecs = '300'
- NetTimeout = '30'
- RedoCompression = 'DISABLE'
- LogShipping = 'ON'
- PreferredApplyInstance = ''
- ApplyInstanceTimeout = '0'
- ApplyLagThreshold = '0'
- TransportLagThreshold = '0'
- TransportDisconnectedThreshold = '30'
- ApplyParallel = 'AUTO'
- StandbyFileManagement = 'AUTO'
- ArchiveLagTarget = '0'
- LogArchiveMaxProcesses = '4'
- LogArchiveMinSucceedDest = '1'
- DbFileNameConvert = ''
- LogFileNameConvert = ''
- FastStartFailoverTarget = ''
- InconsistentProperties = '(monitor)'
- InconsistentLogXptProps = '(monitor)'
- SendQEntries = '(monitor)'
- LogXptStatus = '(monitor)'
- RecvQEntries = '(monitor)'
- StaticConnectIdentifier = '(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dgsd)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=dg12csd_DGMGRL)(INSTANCE_NAME=dg12c)(SERVER=DEDICATED)))'
- StandbyArchiveLocation = '/opt/oracle/oradata/dg12c/archive'
- AlternateLocation = ''
- LogArchiveTrace = '0'
- LogArchiveFormat = 'arch_%r_%t_%s.dbf'
- TopWaitEvents = '(monitor)'
- Database Status:
- SUCCESS
- DGMGRL> ENABLE DATABASE 'dg12csd'
- Enabled.
- DGMGRL> show database 'dg12csd'
- Database - dg12csd
- Role: PHYSICAL STANDBY
- Intended State: APPLY-ON
- Transport Lag: 0 seconds (computed 0 seconds ago)
- Apply Lag: 0 seconds (computed 0 seconds ago)
- Average Apply Rate: 20.00 KByte/s
- Real Time Query: ON
- Instance(s):
- dg12c
- Database Status:
- SUCCESS
- DGMGRL> ENABLE FAR_SYNC dg12cfy;
- Enabled.
- DGMGRL> show configuration;
- Configuration - dg12c_broker
- Protection Mode: MaxPerformance
- Members:
- dg12cpy - Primary database
- dg12csd - Physical standby database
- dg12cfy - Far sync instance
- Fast-Start Failover: DISABLED
- Configuration Status:
- SUCCESS (status updated 7 seconds ago)
查看配置:
- DGMGRL> EDIT DATABASE 'dg12cpy' SET PROPERTY 'RedoRoutes'='(LOCAL : dg12cfy SYNC)';
- Property "RedoRoutes" updated
- DGMGRL> EDIT FAR_SYNC 'dg12cfy' SET PROPERTY 'RedoRoutes'='(dg12cpy : dg12csd ASYNC )';
- Property "RedoRoutes" updated
- DGMGRL> SHOW CONFIGURATION;
- Configuration - dg12c_broker
- Protection Mode: MaxPerformance
- Members:
- dg12cpy - Primary database
- dg12cfy - Far sync instance
- dg12csd - Physical standby database
- Fast-Start Failover: DISABLED
- Configuration Status:
- SUCCESS (status updated 23 seconds ago)
- DGMGRL> EDIT CONFIGURATION SET PROTECTION MODE AS MaxAvailability;
- Succeeded.
- DGMGRL> SHOW CONFIGURATION;
- Configuration - dg12c_broker
- Protection Mode: MaxAvailability
- Members:
- dg12cpy - Primary database
- dg12cfy - Far sync instance
- dg12csd - Physical standby database
- Fast-Start Failover: DISABLED
- Configuration Status:
- SUCCESS (status updated 30 seconds ago)
- DGMGRL> show configuration when primary is 'dg12cpy';
- Configuration when dg12cpy is primary - dg12c_broker
- Members:
- dg12cpy - Primary database
- dg12cfy - Far sync instance
- dg12csd - Physical standby database
- SQL> alter session set container=pdb1;
- Session altered.
- SQL> create table t2 as select * from t1 where 1=0;
- Table created.
- SQL> insert into t2(id,name) values (1,'dfrt');
- 1 row created.
- SQL> commit;
- Commit complete.
- SQL> select * from t2;
- ID NAME
- ---------- ------------------------------------------------------------
- 1 dfrt
- SQL> alter session set container=pdb1;
- Session altered.
- SQL> select * from t2;
- no rows selected
- SQL> select * from t2;
- ID NAME
- ---------- ------------------------------------------------------------
- 1 dfrt
Android群英傳筆記系列一view的介紹,android群英 學習完第一行代碼後,繼續學習Android群英傳,希望能堅持下去,好好學習完這本書,並及時做好相關筆記
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