To start a CDB instance,the current user must be a common user whose current container is the root. ##启动CDB,需要使用root用户 When you open a CDB,its PDBs are mounted. Use the ALTER PLUGGABLE DATABASE statement to modify the open mode of one or more PDBs. ##打开一个CDB,PDB确实mount,需要使用alter pluggable database 修改open模式
<roidb01:cdb1:/home/oracle>$sqlplus / as sysdba sql*Plus: Release 12.1.0.2.0 Production on Mon Mar 5 20:13:46 2018 copyright (c) 1982,2014,Oracle. All rights reserved. Connected to an idle instance. sql> startup ORACLE instance started. Total System Global Area 1174405120 bytes Fixed Size 2923680 bytes Variable Size 436208480 bytes Database Buffers 721420288 bytes Redo Buffers 13852672 bytes Database mounted. Database opened. sql> show con_name CON_NAME ------------------------------ CDB$ROOT sql> show pdbs CON_ID CON_NAME OPEN MODE RESTRICTED ---------- ------------------------------ ---------- ---------- 2 PDB$SEED READ ONLY NO 3 PDB11 MOUNTED sql> alter pluggable database all open; Pluggable database altered. sql> show pdbs; CON_ID CON_NAME OPEN MODE RESTRICTED ---------- ------------------------------ ---------- ---------- 2 PDB$SEED READ ONLY NO 3 PDB11 READ WRITE NO ##默认是读写的 sql>
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