ORACLE ASM, 如果一个DiskGroup下面,创建了两个FailGroup,然后是normal 冗余,其中一个FailGroup损坏了会怎样
ORACLE ASM, 如果一个DiskGroup下面,创建了两个FailGroup,然后是normal 冗余,其中一个FailGroup损坏了会怎样.
这是ocp中的一道题, C 答案说,control1 FG坏了, 会把数据转移到另一个FG, 可是 都坏了,还怎么转移啊????
求解答
我不理解,很不理解, 求解答.
QUESTION 38
A database instance is using an Automatic Storage Management (ASM) instance, which has a diskgroup,
DGROUP1, created as follows:
SQL> CREATE DISKGROUP dgroup1 NORMAL REDUNDANCY
FAILGROUP controller1 DISK '/devices/diska1', '/devices/diska2'
FAILGROUP controller2 DISK '/devices/diskb1', '/devices/diskb2' ;
What happens when the whole CONTROLLER1 Failure group is damaged?
A. The transactions that use the diskgroup will halt.
B. The mirroring of allocation units occurs within the CONTROLLER2 failure group.
C. The data in the CONTROLLER1 failure group is shifted to the CONTROLLER2 failure group and implicit
rebalancing is triggered.
D. The ASM does not mirror any data and newly allocated primary allocation units (AU)are stored in the
CONTROLLER2 failure group.
Answer: C