Practice Free 1z0-499 Oracle ZFS Storage Appliance 2017 Implementation Essentials Exam Questions Answers With Explanation

The Synchronous Write Bias setting controls the behavior when servicing synchronous writes. By default, the system optimizes synchronous writes for latency, which leverages the log devices to provide fast response times. In a system with multiple disjointed filesystems, this can cause contention on the log devices that can increase latency across all consumers. Even with multiple filesystems requesting synchronous semantics, it may be the case that some filesystems are more latency-sensitive than others.

References: https://docs.oracle.com/cd/E51475_01/html/E52872/shares__shares__general__synchronous_write_bias.html

Four Advantages of Application Storage Consolidation and the Sun ZFS Storage Appliance:

• Storage efficiency features such as Compression, De-Duplication and Thin Provisioning
• Instant Backup and Recovery through Snapshots and Clones
• Disaster Recovery features through the use of Replication
• Reduces the amount of storage devices

Incorrect: Answers

A: Oracle ZFS Storage Appliance implements a Hybrid Storage Pool architecture designed to work with multiple tiers of storage media to maximize the performance for the virtualized environment

References: http://www.oracle.com/us/products/servers-storage/storage/unified-storage/zfs-storage-app-storage-appliance-173104.pdf

B: The transactional log and database elements of ZFS send synchronous writes that require acknowledgment from persistent media. For this reason, Write Flash Acceleration SSDs greatly improve the write performance of the ZFS Storage appliance.

E: The implementation of Exchange 2010 and 2007 on the Sun ZFS Storage 7420 can use both iSCSI and Fibre Channel target modes.

Double parity RAID is RAID in which each stripe contains two parity disks. As with triple mirroring, this yields high availability, as data remains available with the failure of any two disks. Double parity RAID is a higher capacity option than the mirroring options and is intended either for high-throughput sequential-access workloads (such as backup) or for storing large amounts of data with low random-read component.

Note: RAIDZ (single parity), Z2 (double parity), Z3 (triple parity)

Block size is included Share properties.

Volume Block Size is the native block size for LUNs. This can be any power of 2 from 512 bytes to 1M, and the default is 8K.

References: Oracle ZFS Storage Appliance Administration Guide (June 2014), page 281