Most Recent Dell EMC D-XTR-DY-A-24 Exam Dumps

The largest size supported for each volume in a new XtremIO X2-S single X-Brick cluster, as per the Official Dell XtremIO Deploy Achievement documents, is 64 TB. This information is verified through the official documentation which outlines the capabilities and specifications of the XtremIO X2 systems. The documents provide a detailed description of the critical components, features, and implementation solutions in customer environments, which includes the storage capacity specifications for XtremIO systems1.

In a heterogeneous environment where multiple storage arrays are connected to VMware vSphere along with XtremIO X2, it is recommended to set the Disk.SchedNumReqOustanding parameter to 32. This setting determines the maximum number of I/O operations that can be queued to the storage array. A value of 32 is often recommended to balance performance with resource utilization.

The Disk.SchedNumReqOustanding parameter is part of the VMware vSphere's advanced settings and can be adjusted to optimize the performance of the storage arrays connected to the ESXi hosts. The setting of 32 is a starting point and may need to be adjusted based on the specific workload and storage array capabilities1.

To create an iSCSI portal using the XtremIO X2 XMS WebUI, an administrator would start the configuration process in the ''Configuration'' section. Here's how the process typically unfolds:

Log into XMS WebUI: The administrator logs into the XtremIO Management Server (XMS) Web User Interface (WebUI).

Navigate to Configuration: Within the WebUI, the administrator navigates to the ''Configuration'' tab. This section contains settings and options for managing and configuring the storage array.

Access iSCSI Options: Under the ''Configuration'' tab, the administrator locates the options for iSCSI settings. This may involve expanding menus or selecting specific sub-options related to iSCSI.

Create iSCSI Portal: Once in the iSCSI settings area, the administrator can create a new iSCSI portal. This involves specifying details such as IP addresses, port numbers, and access controls.

Save and Apply: After entering all necessary information, the administrator saves the configuration and applies it to make the iSCSI portal active.

Verify Connectivity: Finally, the administrator verifies that the iSCSI portal is functioning correctly by connecting to it from an iSCSI initiator.

For detailed instructions and best practices, always refer to the official Dell XtremIO Deploy Achievement document1. This document provides comprehensive guidance on all aspects of setting up and managing XtremIO X2 arrays, including the creation of iSCSI portals.

The XtremIO X2-R array, with its Protection Copies feature provided by the XtremIO 6.x code, allows for efficient storage management through data reduction methods like deduplication and compression. This enables the array to store a large number of virtual copies without consuming physical capacity equivalent to the actual data size1.

Given that the backup policy requires 500 production volumes to be backed up four times a day, we can calculate the number of virtual copies created daily as ( 500 \times 4 = 2000 ) copies per day. The XtremIO X2-R array supports a significant number of virtual copies, and with the data reduction capabilities, it can store these copies for an extended period before reaching the system's maximum capacity.

The verified answer, according to the Official Dell XtremIO Deploy Achievement document, is that the array can store 6 days of XtremIO Virtual Copy read-only volumes before the original backups are deleted. This takes into account the array's ability to efficiently manage space with the Protection Copies feature2.

For a VMware VM running on vSphere 6.5 that will reside on a datastore provisioned from an XtremIO volume, the disk should be presented to the guest as Thick Provisioned, Eager Zero (EZT). This is recommended for the best performance and efficient capacity usage.

Thick Provisioning, Eager Zero: This type of provisioning allocates all the space required for the virtual disk upfront and marks all the space as zeroed. This means that the physical space is reserved and zeroed on the storage array, ensuring that the VM does not have to wait for space to be allocated or zeroed before writing data. This can lead to better performance, especially for I/O-intensive applications1.

XtremIO and EZT: XtremIO arrays are particularly well-suited for EZT because they use inline deduplication and never actually have to zero out physical media. The metadata is kept in memory, and writes are journaled to memory before being saved to SSDs. XtremIO uses VAAI (vStorage APIs for Array Integration) to accelerate zeroing operations, so hosts do not have to write zeros, and the allocation of EZT virtual disks is a very quick operation1.

Performance Considerations: For applications that require low latency, such as databases, using EZT reduces overall latency for the application. Since XtremIO arrays are designed to handle such operations efficiently, the initial zeroing process with EZT, which could take a long time on traditional storage architectures, is significantly faster1.

In conclusion, for ensuring proper performance and capacity usage for a VM on vSphere 6.5 with an XtremIO volume, Thick Provisioned, Eager Zero is the recommended method of disk presentation.