EMC D-VPX-OE-A-24 Exam With Confidence Using Practice Dumps

Based on the information provided in the image, here is the explanation:

Storage Volume 1 (OB): This volume is listed with a capacity of 79.99 GB, health status OK, and status OK. Its use is indicated as ‘meta-data’, which typically means it is reserved for system or metadata use and not available for creating extents.

Storage Volume 2 (OA): This volume has a capacity of 6.00 GB, health status OK, and status OK. Its use is indicated as ‘unclaimed’, which suggests that it has not been allocated for any specific purpose yet and could potentially be used for creating an extent.

Storage Volume 3 (OD): This volume also has a capacity of 6.00 GB, health status OK, and status OK. However, its use is indicated as ‘claimed’, meaning it has already been allocated and is not available for creating new extents.

Storage Volume 4 (OC): The final volume has a capacity of 27.00 GB, health status OK, and status OK. Its use is indicated as ‘used’, which implies that it is currently in use and not available for creating new extents.

Based on the above analysis, the storage volume that is available to be used for the creation of an extent isStorage Volume 2 (OA). It is the only volume marked as ‘unclaimed’ and therefore available for new configurations such as creating extents.

The graph provided in the exhibit shows a high level of ‘Sent’ bandwidth usage, which remains consistently near the upper limit of the chart. This suggests that there is a significant amount of data being sent over the WAN link. In a Dell VPLEX environment, if virtual volumes created on distributed devices experience performance problems, one possible reason could be that I/O demands exceed available WAN COM (WAN Communication) bandwidth.

Here’s a detailed explanation:

High ‘Sent’ Bandwidth Usage: The graph indicates that the ‘Sent’ bandwidth is consistently high, nearing the chart’s maximum capacity.

Impact on Performance: When the I/O of a distributed device exceeds the available WAN COM bandwidth, it can cause a bottleneck, resulting in performance issues such as increased latency or slower response times for write operations.

VPLEX Distributed Architecture: In a VPLEX distributed environment, data must be written to both clusters before an acknowledgment is sent to the host. If the WAN link is saturated, this process is delayed, affecting overall performance.

Monitoring Tools: VPLEX provides monitoring tools that can help identify such issues. The graph in the exhibit likely comes from such a tool, illustrating the system-wide WAN link usage and pinpointing potential performance bottlenecks.

Resolution: To resolve this issue, a storage administrator might need to consider increasing the WAN COM bandwidth, optimizing the data flow, or redistributing the workload to reduce the strain on the WAN link.

References:

Dell EMC VPLEX documentation regarding system performance considerations discusses factors affecting virtual volume performance, including network constraints.

Best practices for VPLEX suggest monitoring WAN link usage and ensuring it aligns with the expected performance levels for distributed devices.

By analyzing the WAN COM bandwidth usage and understanding its impact on distributed device performance, storage administrators can take appropriate actions to mitigate any issues and maintain optimal performance levels.

The SNMP management station connects to the VPLEX Management Server to gather statistics. The Management Server acts as the central point for managing and monitoring the VPLEX environment, including the collection of SNMP statistics.

Management Server Role: The VPLEX Management Server provides a centralized interface for system administration and monitoring.It is responsible for managing the VPLEX clusters and all associated components1.

SNMP Statistics Collection: SNMP (Simple Network Management Protocol) is used for collecting performance and health data from networked devices.The VPLEX Management Server supports SNMP and can be configured to send SNMP traps to a management station1.

Configuration: To enable SNMP monitoring, the VPLEX administrator must configure the Management Server with the appropriate SNMP settings, including the community string and the remote host (management station) details1.

Monitoring with SNMP: Once configured, the SNMP management station can connect to the VPLEX Management Server to collect statistics, which can include a wide range of metrics such as CPU utilization, memory usage, and I/O rates1.

Troubleshooting: If there are issues with SNMP data collection, such as the inability to ping the remote host from the VPLEX Management Server, the administrator may need to check network configurations, such as firewall settings, to ensure proper connectivity1.

By connecting to the VPLEX Management Server, the SNMP management station can effectively gather statistics for monitoring the health and performance of the VPLEX system.