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NEW QUESTION # 61
What is a consideration when using VPLEX RecoverPoint enabled consistency groups?
Answer: A
Explanation:
When using VPLEX with RecoverPoint enabled consistency groups, it is important to ensure that local copy volumes and production volumes are placed in separate consistency groups. This separation is crucial for maintaining the integrity of the data replication and recovery processes.
* Consistency Group Configuration: Consistency groups in VPLEX are logical groupings of virtual volumes that VPLEX treats as a single unit for operations such as data mobility and recovery. When RecoverPoint is enabled, these groups also align with RecoverPoint consistency groups for replication purposes1.
* Separation of Volumes: Keeping local copy volumes (volumes used for local replication) and production volumes (active volumes serving data to hosts) in separate consistency groups helps to prevent any potential conflicts or issues with replication and ensures that the local copies are consistent and usable for recovery1.
* RecoverPoint Replication: RecoverPoint provides continuous data protection and replication for recovery to any point in time. The separation of volumes into different consistency groups helps to manage and maintain the replication process effectively1.
* Operational Management: By separating these volumes into different consistency groups, administrators can manage operations such as replication, failover, and recovery with greater precision and control1.
* Best Practices: This separation is part of the best practices recommended by Dell EMC when configuring VPLEX with RecoverPoint, ensuring that the system operates efficiently and that data is protected in case of any failures1.
In summary, when using VPLEX with RecoverPoint enabled consistency groups, local copy volumes and production volumes must be placed in separate consistency groups to ensure proper replication and recovery processes.
NEW QUESTION # 62
LUNs are being provisioned from active/passive arrays to VPLEX. What is the path requirement for each VPLEX director when connecting to this type of array?
Answer: A
Explanation:
When provisioning LUNs from active/passive arrays to VPLEX, it is essential that each VPLEX director has at least two paths to both the active and passive controllers of each array. This requirement ensures high availability and redundancy for the storage volumes being managed by VPLEX1.
* Active/Passive Arrays: Active/passive arrays have one controller actively serving I/O (active) and
* another on standby (passive). The VPLEX system must have paths to both controllers to maintain access to the LUNs in case the active controller fails1.
* Path Redundancy: Having at least two paths to both controllers from each VPLEX director provides redundancy. If one path fails, the other can continue to serve I/O, preventing disruption to the host applications1.
* VPLEX Configuration: In the VPLEX configuration, paths are zoned and masked to ensure that the VPLEX directors can access the LUNs on the storage arrays. Proper zoning and masking are critical for the paths to function correctly1.
* Failover Capability: The dual-path configuration allows VPLEX to perform an automatic failover to the passive controller if the active controller becomes unavailable, ensuring continuous data availability1.
* Best Practices: Following the path requirement as per Dell EMC's best practices ensures that the VPLEX system can provide the expected level of service and data protection for the provisioned LUNs1.
In summary, the path requirement for each VPLEX director when connecting to active/passive arrays is to have at least two paths to both the active and passive controllers of each array, providing the necessary redundancy and failover capabilities.
NEW QUESTION # 63
What is an EMC best practice for connecting VPLEX to back-end arrays?
Answer: B
Explanation:
EMC recommends specific best practices for connecting VPLEX to back-end storage arrays to ensure high availability and optimal performance. One of these best practices is that each VPLEX director should have four active paths to every back-end array storage volume.
* Multiple Paths: Having multiple active paths from each VPLEX director to the storage volumes ensures that there is no single point of failure. If one path fails, the other paths can continue to provide connectivity1.
* Load Balancing: Multiple paths also allow for load balancing of I/O operations across the different paths, which can improve performance and reduce the risk of bottlenecks1.
* Path Redundancy: Path redundancy is crucial for maintaining continuous availability, especially in environments where the VPLEX is used for mission-critical applications1.
* Configuration: The configuration of the paths should be done in accordance with EMC's best practices, which include proper zoning and masking in the SAN environment1.
* Documentation: Detailed guidelines and best practices for VPLEX SAN connectivity, including back-end array connections, are available in EMC's documentation, which provides comprehensive instructions for setting up and managing these connections1.
In summary, EMC's best practice for connecting VPLEX to back-end arrays is to ensure that each VPLEX director has four active paths to every back-end array storage volume. This setup provides the necessary redundancy and performance for a robust and reliable storage environment.
NEW QUESTION # 64
A RAID-C device has been built from a 100 GB extent and a 30 GB extent. How can this device be expanded?
Answer: D
Explanation:
To expand a RAID-C device that has been built from extents of unequal sizes, such as a 100 GB extent and a
30 GB extent, concatenation can be used. Concatenation allows for the addition of another extent to the existing RAID-C device, thereby increasing its overall size.
* Understanding RAID-C: RAID-C is a type of RAID configuration used in VPLEX that allows for concatenation, which is the process of linking multiple storage extents to create a larger logical unit1.
* Adding an Extent: To expand the RAID-C device, a new extent of the desired size can be added to the existing device. This new extent is concatenated to the end of the current extents, increasing the total capacity of the RAID-C device1.
* VPLEX CLI Commands: The expansion is performed using VPLEX CLI commands. The specific command to add an extent to a RAID-C device would be similar to the storage-volume expand command, which instructs the system to include the new extent in the RAID-C device1.
* Resizing Back-End Storage: If necessary, the back-end storage volumes (the physical storage on the array) that correspond to the extents may need to be resized to match the new configuration1.
* Verification: After the expansion, it's important to verify that the RAID-C device reflects the new size and that all extents are properly concatenated and functioning as expected1.
In summary, a RAID-C device built from extents of unequal sizes can be expanded by using concatenation to add another extent to the device. This method allows for flexibility in managing storage capacity within a VPLEX environment.
NEW QUESTION # 65
You are troubleshooting performance issues on a Microsoft SQL Server application hosted on a VPLEX virtual volume. You discover the volume is involved in a data mobility job with a transfer rate of 32 MB. It has been recommended to change this setting.
Which transfer rate will help improve the performance of the Microsoft SQL Server application?
Answer: C
Explanation:
When troubleshooting performance issues on a Microsoft SQL Server application hosted on a VPLEX virtual volume, adjusting the data mobility job transfer rate can have a significant impact on the application's performance. A higher transfer rate can help improve performance by allowing data to be moved more quickly, reducing the impact on the application's I/O operations.
* Assessing Current Performance: The current transfer rate of 32 MB may be insufficient for the workload of the SQL Server application, leading to performance issues1.
* Recommended Transfer Rate: Increasing the transfer rate to 120 MB can help alleviate these performance issues by accelerating the data mobility process, thus minimizing the time during which the SQL Server application's performance is impacted1.
* Implementing the Change: To change the transfer rate, the administrator would use the VPLEX CLI to adjust the settings for the data mobility jB. This involves modifying the transfer rate parameter to the new value of 120 MB1.
* Monitoring the Impact: After making the change, it's important to monitor the SQL Server application's performance to ensure that the new transfer rate is having the desired effect and not causing any additional issues1.
* Best Practices: It is recommended to follow best practices for data mobility and performance tuning as outlined in the Dell VPLEX documentation, which includes considering the impact of data mobility jobs on application performance1.
In summary, changing the data mobility job transfer rate to 120 MB is recommended to help improve the performance of the Microsoft SQL Server application hosted on a VPLEX virtual volume.
NEW QUESTION # 66
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