Greg Ferro


Upcoming Events

Where the Cloud Touches Down: Simplifying Data Center Infrastructure Management

Thursday, July 25, 2013
10:00 AM PT/1:00 PM ET

In most data centers, DCIM rests on a shaky foundation of manual record keeping and scattered documentation. OpManager replaces data center documentation with a single repository for data, QRCodes for asset tracking, accurate 3D mapping of asset locations, and a configuration management database (CMDB). In this webcast, sponsored by ManageEngine, you will see how a real-world datacenter mapping stored in racktables gets imported into OpManager, which then provides a 3D visualization of where assets actually are. You'll also see how the QR Code generator helps you make the link between real assets and the monitoring world, and how the layered CMDB provides a single point of view for all your configuration data.

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A Network Computing Webinar:
SDN First Steps

Thursday, August 8, 2013
11:00 AM PT / 2:00 PM ET

This webinar will help attendees understand the overall concept of SDN and its benefits, describe the different conceptual approaches to SDN, and examine the various technologies, both proprietary and open source, that are emerging. It will also help users decide whether SDN makes sense in their environment, and outline the first steps IT can take for testing SDN technologies.

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WAN Acceleration Slows Down

A variety of forces are arrayed against the WAN acceleration/ optimization market, including falling bandwidth costs, new IT funding models, better-designed applications, and more. These forces won't kill the WAN acceleration market, but I believe they will keep it from growing.

A recent Infonetics report on ADCs and WAN optimization bears this out. The report stated "WAN optimization sales got a temporary bump in 2Q13, but the segment remains on an overall downward trajectory, declining 11% from 2Q12."

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Last year I wrote a report, The Next-Gen WAN (registration required), that drew from an InformationWeek survey of IT professionals. While 51% of respondents said they use WAN optimization on either most connections or a few key connections, I also stated "the value of this technology may fade in the years ahead." Here's why.

Bandwidth is Cheap

The easiest way to improve a WAN connection is to buy more bandwidth, and that option becomes more feasible as the price of WAN bandwidth continues to drop. But there are other factors that make bandwidth even cheaper.

The first is the slow but gradual growth of Virtual Desktop Infrastructure (VDI). In the last five years, VDI has moved from "sort of works" to "works well enough" to gain wider acceptance. Besides reducing bandwidth consumption, VDI has other values, including improved security and simpler desktop administration.

[Storage plays a key role in VDI. Find out how to put the latest storage advances to work for you in "Solving VDI Problems with SSDs and Data Deduplication."]

The second factor is the increasing use of Internet connections as primary bandwidth to replace traditional WAN services. VPN technology has traditionally been complex and hard to operate, but recent enhancements have made this choice more attractive. Internet connectivity is many times cheaper than WAN and readily available in any geography.

There is an interesting business condition here as bandwidth moves to Internet connections and consumes the majority of resources. As that trend continues, dedicated WAN costs will become more expensive. This will count against WAN optimization in the long term.

Capital and Operations

Companies are reluctant to invest large amounts of capital to reduce operating expenses. The current trend is to move IT charges into operating expenses. WAN acceleration is both capital intensive and operationally expensive due to its high purchase cost and ongoing support and maintenance costs (including the IT personnel to manage the product).

While many WAN optimization companies are providing virtual appliances to reduce costs, you still need to provision each remote location with at least a physical server, hypervisor and the virtual appliance.

These days, IT funding models aim to incur costs on a monthly or quarterly basis to match ROI; a technology deployment such as WAN optimization that requires a year or more to show ROI is likely a non-starter.

Some analysts and engineers believe WAN acceleration has a future in hybrid cloud applications, which could perhaps justify capital and operational expenses. But I think dynamic bursting between private and public clouds is an edge case at best, not a mass-market play. Hybrid cloud rarely survives a close technical inspection.

New Protocols and Applications

Another less visible trend is that software vendors are becoming conscious of network efficiency. Although a decade overdue, new protocols such as SPDY and Microsoft's SMB 3.0, as well as more efficient programming, are improving the network response times for applications. WAN acceleration has always been a workaround for poor technology, so any concerted to improve application efficiency makes the entire WAN optimization industry less relevant.

While the business case is against WAN acceleration, we won't see the end of this market in the next decade. Locations that have poor telecommunications infrastructure have specific needs that WAN acceleration can meet.

That said, overall it's hard to see that WAN acceleration will grow. It's time to focus on structural change in IT infrastructure and move past minor (but operationally expensive) tweaks to efficiency in the WAN.

[QoS can help make the best use of available bandwidth. Get a deep dive on how to take advantage of QoS at Interop New York in the workshop "How To Set Up Network QoS for Voice, Video & Data."] Click the link for details.


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