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Exam Oracle ZFS Storage Appliance 2017 Implementation Essentials
Number 1z0-499
File Name Oracle.1z0-499.Prep4Sure.2018-12-21.37q.vcex
Size 1 MB
Posted Dec 21, 2018
Download Oracle.1z0-499.Prep4Sure.2018-12-21.37q.vcex

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Demo Questions

Question 1

Identify two classes of resources within the Oracle ZFS Appliance cluster.


  1. network
  2. storage
  3. cache
  4. memory
Correct answer: AB



Question 2

A customer wants to enable compression for a performance-sensitive application with greater compute resource utilization. What should you use to achieve this goal?


  1. SHA-1
  2. GZIP
  3. LZJB
  4. GZIP-9
Correct answer: C
Explanation:
Data compression (compression): Off for performance-optimized systems, LZJB or gzip-2 for capacity-optimized systems.References:  Oracle ZFS Storage Appliance Administration Guide (June 2014), page 434
Data compression (compression): Off for performance-optimized systems, LZJB or gzip-2 for capacity-optimized systems.
References:  Oracle ZFS Storage Appliance Administration Guide (June 2014), page 434



Question 3

How do you disable a specific version of NFS in a ZFS Storage Appliance?


  1. Reduce the maximum number of concurrent NFS requests allowed.
  2. Disable the NFSv4 delegation.
  3. Set another NFS version number (the same version number) on both NFS minimum and maximum versions.
  4. Enable iSNS discovery.
Correct answer: C
Explanation:
NFS Service properties include:Minimum supported version - Use this to control which versions of NFS the appliance supports. Maximum supported version - Use this to control which versions of NFS the appliance supports. Setting the NFS minimum and maximum versions to the same value causes the appliance to only communicate with clients using that version. This may be useful if you find an issue with one NFS version or the other (such as the performance characteristics of an NFS version with your workload), and you want to force clients to only use the version that works best. Incorrect Answers:B: Enable NFSv4 delegation - Select this property to allow clients to cache files locally and make modifications without contacting the server. This option is enabled by default and typically results in better performance; but in rare circumstances it can cause problems. You should only disable this setting after careful performance measurements of your particular workload and after validating that the setting has a measurable performance benefit. This option only affects NFSv4.0 and NFSv4.1 mounts.References: https://docs.oracle.com/cd/E79446_01/html/E79457/gokih.html
NFS Service properties include:
Minimum supported version - Use this to control which versions of NFS the appliance supports. 
Maximum supported version - Use this to control which versions of NFS the appliance supports. 
Setting the NFS minimum and maximum versions to the same value causes the appliance to only communicate with clients using that version. This may be useful if you find an issue with one NFS version or the other (such as the performance characteristics of an NFS version with your workload), and you want to force clients to only use the version that works best. 
Incorrect Answers:
B: Enable NFSv4 delegation - Select this property to allow clients to cache files locally and make modifications without contacting the server. This option is enabled by default and typically results in better performance; but in rare circumstances it can cause problems. You should only disable this setting after careful performance measurements of your particular workload and after validating that the setting has a measurable performance benefit. This option only affects NFSv4.0 and NFSv4.1 mounts.
References: https://docs.oracle.com/cd/E79446_01/html/E79457/gokih.html



Question 4

A storage administrator wants to configure a cache profile. Which is a valid configuration type?


  1. single-parity raid, narrow stripes
  2. mirrored
  3. double-parity raid
  4. triple mirrored
  5. striped
Correct answer: E
Explanation:
For cache devices, the profile is always striped, as shown under Cache Profile. References: https://docs.oracle.com/cd/E78901_01/html/E78912/goozt.html
For cache devices, the profile is always striped, as shown under Cache Profile. 
References: https://docs.oracle.com/cd/E78901_01/html/E78912/goozt.html



Question 5

A storage administrator wants to configure a snapshot in a ZFS Storage Appliance. 
Which action must the administrator perform to ensure application consistency?


  1. Schedule snapshots to occur at a specific time each day.
  2. Quiesce, sync, or shut down the application and then take a snapshot of the master LUN.
  3. Quiesce, sync, or shut down the application before taking a snapshot of the project defined for the application.
  4. Schedule project snapshots to occur periodically. This way, the storage administrator is sure to get all open files by the end of the day.
Correct answer: D
Explanation:
Scheduling Snapshots. Automatic snapshots can be taken half-hourly, hourly, daily, weekly, or monthly and are named. Automatic snapshots can be set on a project or a share, but not both. Otherwise, overlapping schedules and retention policies would make it impossible to guarantee both schedules. References: https://docs.oracle.com/cd/E78901_01/html/E78912/gprhe.html
Scheduling Snapshots. Automatic snapshots can be taken half-hourly, hourly, daily, weekly, or monthly and are named. Automatic snapshots can be set on a project or a share, but not both. Otherwise, overlapping schedules and retention policies would make it impossible to guarantee both schedules. 
References: https://docs.oracle.com/cd/E78901_01/html/E78912/gprhe.html



Question 6

When an operation lacks sufficient disk space, which three configurations can make available on a ZFS Storage Appliance?


  1. thin provisioning
  2. hybrid columnar compression
  3. deduplication
  4. hybrid storage pool
  5. Dtrace Analytics
Correct answer: ABC
Explanation:
Thin Provisioned Controls whether space is reserved for the volume. This property is only valid for LUNs. By default, a LUN reserves exactly enough space to completely fill the volume. This ensures that clients will not get out-of-space errors at inopportune times. This property allows the volume size to exceed the amount of available space. When set, the LUN will consume only the space that has been written to the LUN. Hybrid Columnar Compression is an Oracle Database compression technology which enables the highest levels of data compression and provides enterprises with cost savings and performance improvements due to reduced I/O. Hybrid Columnar Compression can be enabled on Oracle Databases residing on dNFS shares without ASM on an Oracle ZFS Storage Appliance beginning with Oracle Database Enterprise Edition 11.2.0.3. If your data does contain duplicates, enabling Data Deduplication will both save space by storing only one copy of a given block regardless of how many times it occurs. Incorrect Answers:E: The ZFS Storage Appliance includes a comprehensive performance analysis tool called DTrace Analytics. DTrace Analytics is a framework that monitors important subsystem performance accounting statistics. A subset of the available accounting statistics should be monitored to provide comprehensive data on the effectiveness and performance of Oracle RMAN backup and restore workloads.References: Oracle ZFS Storage Appliance Administration Guide (June 2014), page 304http://www.oracle.com/technetwork/server-storage/sun-unified-storage/documentation/problemsolver-hcc-52014-2202692.pdf
Thin Provisioned 
Controls whether space is reserved for the volume. This property is only valid for LUNs. By default, a LUN reserves exactly enough space to completely fill the volume. This ensures that clients will not get out-of-space errors at inopportune times. This property allows the volume size to exceed the amount of available space. When set, the LUN will consume only the space that has been written to the LUN. 
Hybrid Columnar Compression is an Oracle Database compression technology which enables the highest levels of data compression and provides enterprises with cost savings and performance improvements due to reduced I/O. Hybrid Columnar Compression can be enabled on Oracle Databases residing on dNFS shares without ASM on an Oracle ZFS Storage Appliance beginning with Oracle Database Enterprise Edition 11.2.0.3. 
If your data does contain duplicates, enabling Data Deduplication will both save space by storing only one copy of a given block regardless of how many times it occurs. 
Incorrect Answers:
E: The ZFS Storage Appliance includes a comprehensive performance analysis tool called DTrace Analytics. DTrace Analytics is a framework that monitors important subsystem performance accounting statistics. A subset of the available accounting statistics should be monitored to provide comprehensive data on the effectiveness and performance of Oracle RMAN backup and restore workloads.
References: Oracle ZFS Storage Appliance Administration Guide (June 2014), page 304
http://www.oracle.com/technetwork/server-storage/sun-unified-storage/documentation/problemsolver-hcc-52014-2202692.pdf



Question 7

Which type of I/O workload benefits the most from read SSDs?


  1. sequential write
  2. random write
  3. random read
  4. sequential read
  5. mixed random and sequential write
Correct answer: C



Question 8

Identify three valid thresholds used by the Status Dashboard.


  1. Sunny
  2. Rainy
  3. Monsoon
  4. Cat-5 Hurricane
  5. Thunderstorm
Correct answer: ABD
Explanation:
Use the Thresholds screen to configure the dashboard activity weather icons. The defaults provided are based on heavy workloads and may not be suitable for your environment.     References: https://docs.oracle.com/cd/E56021_01/html/E55851/goosp.html
Use the Thresholds screen to configure the dashboard activity weather icons. The defaults provided are based on heavy workloads and may not be suitable for your environment. 
  
References: https://docs.oracle.com/cd/E56021_01/html/E55851/goosp.html



Question 9

Which three features of the Oracle ZFS Storage Appliance are ideal for virtualization?


  1. The ZFS Storage Appliance browser user interface (BUI): It is a graphical tool for administration of the appliance.
  2. DRAM-centric architecture: It dramatically increases the number of virtual machines (VMs) that you can deploy per system, lowering costs and increasing efficiency.
  3. Oracle Key Manager: It can be used for Oracle ZFS Storage Appliance encryption.
  4. True symmetric multiprocessing (SM) OS: It prevents the system from being overwhelmed by VM threads.
  5. DTrace Analytics: It provides VM-level visibility into business-critical workloads to resolve performance issues.
Correct answer: BDE



Question 10

What happens when the thin provisioning property is set for a LUN?


  1. A share reserves exactly enough space to completely fill the share.
  2. This property allows volume size to exceed the amount of available space.
  3. Thin provisioning allows the storage administrator to divide the pool capacity into evenly sized LUNs.
  4. A ZFS file system is created by setting quota and reservation to the same value.
Correct answer: B
Explanation:
Thin Provisioning controls whether space is reserved for the volume. This property is only valid for LUNs. By default, a LUN reserves exactly enough space to completely fill the volume. This ensures that clients will not get out-of-space errors at inopportune times. This property allows the volume size to exceed the amount of available space. When set, the LUN will consume only the space that has been written to the LUN. References: https://docs.oracle.com/cd/E37831_01/html/E52872/shares__shares__general__space_usage.html
Thin Provisioning controls whether space is reserved for the volume. This property is only valid for LUNs. By default, a LUN reserves exactly enough space to completely fill the volume. This ensures that clients will not get out-of-space errors at inopportune times. This property allows the volume size to exceed the amount of available space. When set, the LUN will consume only the space that has been written to the LUN. 
References: https://docs.oracle.com/cd/E37831_01/html/E52872/shares__shares__general__space_usage.html









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