[Virtualization practice] storage design 4 Local Storage

Author: Fan Jun Frank Fan) Sina Weibo: @ frankfan7: frankfan7

Problem description:

Local Storage has received more and more attention in the virtualization Architecture Design in recent years. SAN Local Storage costs are much lower. Whether local storage is suitable for your environment requires a detailed analysis of the problem. This article uses only one case to help you understand the advantages and disadvantages of local storage.

Requirements:

The customer runs a virtual desktop environment, which currently has approximately500Virtual desktops are expected to be extended to a maximum1000.

The main user of a VM is the call center's customer service staff. Because all users use standardized applications and PooledDesktop. The RTORecoveryTime Objective of the virtual machine is required to be 1 hour. That is to say, if a virtual machine goes down, the user can reconnect to a virtual desktop within one hour.

The customer's budget is low. If the storage device costs a lot, it may lead to a loss of the project.

Hypothesis:

N/

Restrictions:

Currently, the available capacity of shared storage cannot fully meet the needs of virtual desktop projects.

Architecture Design tendency:

Users tend to consider low-cost solutions

Recommended architecture solutions:

Select Local Storage andFilerHybrid mode. FromABrief History of Desktop Storage ArchitectureArticle

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HostDASD (Host Direct Access Storage Device) refers to the local Storage of ESXi Host.

CorporateFiler is used to store applications and user data.

Because this case is Pooled Desktop, there is no User Persona, so SAN will not be used.

Other options:

FC/iSCSI/NFS Storage

Reason:

1Local Storage can greatly reduce the initial investment

2Because yesPooled Desktop, Virtual desktops and their running applications are completely standardized. Users cannot save personalized settings. Assuming that the host where a virtual desktop is located is down, the user can immediately connect to the virtual desktop running on other hosts.

In this caseHA,VMotionIt is not necessary.

3Customers can adopt some processes to balance virtual desktops running on all hosts.DRSNot required.

4Is500-1000The virtual desktop environment is relatively easy to control. When you need to maintain the host, you can use manualChange ManagementMethod.Call CenterEachShiftThe working time is also fixed. You can arrange the maintenance period in advance to inform the user before MaintenanceLog Off

Impact of this design decision:

1. Comprehensive CapacityPlanning is required to ensure that local storage can meet the performance and capacity requirements of virtual desktops.

2. When the IOPS demand is high, SSD and other low-cost types can be considered. Or consider Flash Memory such as Fusion-IO.

3. Complete Change Management is required. Because host maintenance requires ChangeManagement, the O & M costs are relatively high.

Refer:

VDIstorage shocould be local!

ABrief History of Desktop Storage Architecture

This article from "sit up and watch the cloud" blog, please be sure to keep this source http://frankfan.blog.51cto.com/6402282/1211576