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Archive for the ‘Virtualization’ Category

 

The benefits of virtualization are clear cut – massive financial savings in the long run. Virtualization enables organizations to use inexpensive hardware as terminals for multiple desktops which lowers costs in energy, hardware, maintenance and licensing. From a daily user’s standpoint, the convenience of accessing their personal desktops from any device effectively accelerates their time-to-value. However, the transition to virtualization can be costly and companies have to cough up now to achieve the benefits later.

Virtualization enables users to access distributed enterprise applications securely from any remote client device — when it works. If the network fails to perform against defined standards, end users of virtual applications and desktop sessions experience sluggish performance, system freezes and often outright disconnects. Regardless if Virtual Desktop Infrastructure (VDI)  is hosted in your own data center, or remotely, all performance issues – and finger pointing – will come down hard on an IT team.

While occasionally hosted on the LAN, VDI is more commonly reached over a WAN connection. If the performance of this link cannot be ensured, there is no point in virtualizing. Due to the nature of virtualization, a majority of stalls occur when employees are accessing their desktops over the WAN. Critical VDI links can become compromised during peak usage and need to be continuously monitored.

While we all know the frustration that slow applications produce, end users have zero patience for latency or poor performance when it comes to their entire desktop. VDI carries the highest sensitivity level of all applications and its success rating is directly dependent on user satisfaction.

IT professionals who do not pre-asses the network before virtualizing, put their jobs on the line. It is common to underestimate how much data is cycling weekly until there are attempts to move it, and taking an accurate reading of the WAN link is critical. Virtual software providers offer bandwidth requirements – but can the network guarantee that that bandwidth is available? Even during peak utilization? Is there space left to grow?

Requirements for a Successful VDI deployment

• Insight into the critical links while continuously monitoring the performance of VDI from the perspective of your remote site end users.

• Understanding of the measurement from the connection of end users back to the server and the ability to compare real-time against the key performance indicators needed by VDI services to perform properly.

• Alerting and reporting on network issues affecting system and virtualized application performance for pro-active troubleshooting.

Current tools used to monitor VDI include Xangati, Liquid Labs and Lakeside. These solutions are critical for monitoring the health and state of the virtual machines or locations where the application is being consumed. This means that the connection between end users and the virtualized servers is often left unsupervised. There may be green lights showing for all the devices, yet the phone is bright red with complaints. When polling devices produce a summary every few minutes, seconds of latency can be invisible on a monitoring screen, but it won’t be to the engineer who receives the phone call. VDI performance is dependent on the links between remote users and servers.

PathView Cloud offers the ability to assess, monitor and remotely troubleshoot performance from a virtual or physical system to any other target across LANs, WANs, even segments you don’t own or manage.

Want to learn more? Visit AppNeta or start a free trial on your network today!

Desktop and application virtualization offer a more efficient approach to PC management, offering reduced administrative, hardware and energy costs, along with stronger security. Virtual desktop infrastructure (VDI) can also improve productivity, by enabling users to access distributed applications remotely from any client device.

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The expanding virtual workforce, growing popularity of mobile devices, and ongoing IT belt-tightening have combined to make VDI one of the most critical IT services for organizations of all sizes. But, in order to realize the benefits of virtual desktops, you must be able to ensure the performance of the access network that connects remote clients to the virtual infrastructure. Most applications that are being virtualized were not designed for remote access in the first place. So when network performance   falters below acceptable thresholds, applications become sluggish, freeze and finally disconnect – leaving users aggravated and unproductive.

Unfortunately, many VDI deployments are hampered by frustrating and hard-to-identify network performance problems. SNMP-based network management tools can only provide information on the devices that a company manages directly, rendering them unhelpful with troubleshooting network performance issues along the VDI service path. Traditional “netflow analysis” solutions are costly, difficult to deploy and manage, and consume massive amounts of bandwidth, making them unsuitable for remote sites.

What is required for managing network performance for VDI deployments is the ability to assess, continuously monitor and remotely  troubleshoot network performance from a virtual or physical system to any other target – across LANs (wired or wireless…), WANs and even public networks. Application engineers must be able to:

  1. Pre-Assess the customer network to understand if the current network is ready (or not) for VDI deployment in order to set expectations and resolve any issues proactively.  The assessment needs to understand the specific operational requirements of the selected VDI vendor.
  1. While assessments are a key first step, they are only good for a given point in time and networks are very dynamic in nature.  Therefore to assure success, continuous monitoring of key network performance indicators (KPIs) that are critical to the successful delivery of VDI services is essential. These include total, consumed and available capacity, network utilization, latency, packet loss and jitter.   It’s vital that the monitoring be able to understand the network in totality (i.e., in the same way the VDI infrastructure will leverage the network…) and not affect production VDI network traffic.
  2. Compare real-time network performance with the KPI values that virtual desktop services need to function properly, in order to ensure overall Quality of Service.  When differences do appear, alert key operations staff to any SLA violations and enable intelligent diagnostics to understand the where and the why in order to reduce meantime to repair. AppNeta has the experience and expertise to know the exact performance thresholds needed for all major vendors to assure success with the VDI performance.

How can network engineers gain a real-time view into network performance between remote users and virtualized servers – and respond more quickly to their frustrated end users? AppNeta’s PathView Cloud technology offers instant value and immediate insight to identify whether the cause of poor performance resides along the network or within the VDI. By enabling the proactive monitoring of access networks against KPIs, PathView Cloud lets you troubleshoot and pinpoint the performance problems of virtualized applications at remote sites so you can ensure QoS for users.

Want to learn more? Check out the Live Demo or start a FREE trial today!


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