Oracle OCP 1Z0 053 Q659(ASM Rebalance Trigger)

659.Which two commands never trigger an implicit rebalancing within the disk group?. (Choose two.)
A. ALTER DISKGROUP misc MOUNT;
B. ALTER DISKGROUP misc DROP DISK misc2;
C. ALTER DISKGROUP misc CHECK ALL NOREPAIR;
D. ALTER DISKGROUP misc RESIZE ALL SIZE 1023m;
E. ALTER DISKGROUP dgroupA ADD DISK '/devices/A*';
Answer: AC

Rebalance operation

Disk group rebalance is triggered automatically on ADD, DROP and RESIZE disk operations and on moving a file between hot and cold regions.

摘自：http://asmsupportguy.blogspot.jp/2011/11/rebalancing-act.html

這裡的意思是，只有當ADD, DROP, RESIZE操作才會觸發rebalance

參考：http://blog.csdn.net/rlhua/article/details/14553885

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