多选题Which two statements are true about variable extent size support for large ASM files?()AThe metadata used to track extents in SGA is reduced.BRebalance operations are completed faster than with a fixed extent sizeCAn ASM Instance automatically allocates an appropriate extent size.DResync operations are completed faster when a disk comes online after being taken offline.EPerformance improves in a stretch cluster configuration by reading from a local copy of an extent.

多选题
Which two statements are true about variable extent size support for large ASM files?()
A

The metadata used to track extents in SGA is reduced.

B

Rebalance operations are completed faster than with a fixed extent size

C

An ASM Instance automatically allocates an appropriate extent size.

D

Resync operations are completed faster when a disk comes online after being taken offline.

E

Performance improves in a stretch cluster configuration by reading from a local copy of an extent.


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多选题What are the advantages of variable extent size support for large ASM files?()AIt improves resync operations when the disk comes online after being taken offline for maintenance purposes.BIt improves performance in the extended cluster configuration by reading from a local copy of an extent.CFewer extent pointers are needed to describe the file and less memory is required to manage the extent maps in the shared pool.DThis feature enables faster file opens because of the reduction in the amount of memory that is required to store file extents.

多选题You are managing an Oracle 11g database with ASM storage, for which the COMPATIBLE initialization parameter is set to 11.1.0. In the ASM instance, the COMPATIBLE.RDBMS attribute for the disk group is set to 10.2 and the COMPATIBLE.ASM attribute is set to 11.1. Which two statements are true in this scenario for the features enabled for ASM? ()AThe ASM-preferred mirror read feature is enabled.BThe ASM supports variable sizes for extents of 1, 8, and 64 allocation units.CThe ASM disk is dropped immediately from a disk group when it becomes unavailable.DThe RDBMS always reads the primary copy of a mirrored extent of the ASM disk group.

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多选题You are managing an Oracle Database 11g ASM instance having three disks in a disk group with ASM compatibility attribute set to 11.1.0 and redundancy set to high. One of the disks in the disk group becomes unavailable because of power failure.  Which statements will be true in this scenario?()AThe disk is immediately dropped from the disk group.BThe ASM tracks the extents that are modified during the outaCThe ASM migrates the extents from the unavailable disk to the remaining disks.DThe disk automatically goes offline.

多选题You are managing an Oracle Database 11g instance and an Oracle Database 10g instance on the same machine. Both instances use the ASM instance as storage. Which statement regarding the ASM disk group compatibility attributes are true in this scenario?()AThe database-compatibility version settings for each instance must be greater than or equal to the RDBMS compatibility of all ASM disk groups used by that database instances.BRDBMS compatibility and the database version determines whether a database instance can mount the ASM disk group.CThe RDBMS compatibility settings for a disk group control the format of data structures for ASM metadata on the disk.DASM compatibility controls which features for the ASM will be enabled.