|By Lori MacVittie||
|April 3, 2013 10:00 AM EDT||
If you're immersed in the world of service providers (sometimes called carriers, telecoms, or carrier service providers) then you've probably heard the term "traffic steering."
Trafﬁc steering is the ability to control and direct data and voice trafﬁc to the best suitable cell layer and radio technology within any network. It becomes a key feature in LTE networks deployed over multiple layers, such as frequency layers and/or hierarchy layers as macro, pico or femtocells.Those networks make available resources from multiple layers to an end-user in a certain geographical area. Therefore, trafﬁc steering could optimise network capacity and user experience via an efﬁcient utilisation of the whole pool of available resources (e.g. radio,transport, backhaul).
A similar concept, HTTP Message Steering, is used in data center networks to provide this same type of capabilities with respect to routing HTTP requests and responses to services as determined to be appropriate based on operational and business requirements.
Now, more astute readers will immediately ask the question, "How is this different from content switching (or content steering, if we want to adopt modern nomenclature)?"
It's a good question, and one that deserves an answer. Content steering executes very similar logic in that it is able to determine how to route or handle HTTP requests based on the context of the request.
The thing with content steering (or page routing or whatever the nom de jour might be this year) is that it's self-contained. Whatever variables are used to determine how to route the request had better be either in the content, on the system, or able to be deduced from the connections between client and intermediary, intermediary and client.
HTTP Message Steering, like it's cousin traffic steering, implies the use of an external, off-the-box service to augment the data upon which the routing decision is made. If we take (again, because I like this use case) API metering, it is fairly obvious that the intermediate proxy is not going to be storing the data necessary to determine whether a given request will exceed a user's quota. Proxies store session-related data, but do not weight themselves down with the mechanisms and memory needed to store long term data. A failure, remember, means anything in memory necessarily disappears, and something like API usage metrics is not something you want lost. It's longer term, it exists outside any given session. It's persistent, in developer-speak, and thus requires a more permanent means of storage to ensure it continues to exist across sessions.
Thus, if an intermediate proxy requires persistent data to make a routing decision, we call it message steering to differentiate it from the more near-term, session-constrained content steering. The differentiation is necessary because it has architectural ramifications that need to be considered. If you want to be able to execute HTTP message steering then you are going to need a proxy. Period.
That's because only a true (full) proxy terminates (acts as the client destination) the underlying TCP connection. Because there is a clear separation between client-side and server-side, a proxy can steer a message in any direction - including to a third-party persistent data service. A solution that is not a true proxy can only perform content steering, because it doesn't have the mechanisms required to initiate a connection on its own; it's purely a seamstress, stitching up a connection between the client and the application service and maintaining the flow between them. A proxy intercedes, it intercepts, it inspects and redirects if necessary. It can take other action because technically it is the destination end-point.
HTTP Message Steering is a component of an application layer SDN; programmatically enabling the routing of requests and responses to services in the data center fabric based on policy. It is one of the core technologies comprising an application layer SDN and the underlying nature of a proxy-based application network service is the foundation upon which such solutions are built.
Monitoring of Docker environments is challenging. Why? Because each container typically runs a single process, has its own environment, utilizes virtual networks, or has various methods of managing storage. Traditional monitoring solutions take metrics from each server and applications they run. These servers and applications running on them are typically very static, with very long uptimes. Docker deployments are different: a set of containers may run many applications, all sharing the resource...
Dec. 3, 2016 02:15 PM EST Reads: 5,457
Join Impiger for their featured webinar: ‘Cloud Computing: A Roadmap to Modern Software Delivery’ on November 10, 2016, at 12:00 pm CST. Very few companies have not experienced some impact to their IT delivery due to the evolution of cloud computing. This webinar is not about deciding whether you should entertain moving some or all of your IT to the cloud, but rather, a detailed look under the hood to help IT professionals understand how cloud adoption has evolved and what trends will impact th...
Dec. 3, 2016 02:00 PM EST Reads: 2,463
Without lifecycle traceability and visibility across the tool chain, stakeholders from Planning-to-Ops have limited insight and answers to who, what, when, why and how across the DevOps lifecycle. This impacts the ability to deliver high quality software at the needed velocity to drive positive business outcomes. In his session at @DevOpsSummit 19th Cloud Expo, Eric Robertson, General Manager at CollabNet, showed how customers are able to achieve a level of transparency that enables everyone fro...
Dec. 3, 2016 01:45 PM EST Reads: 1,803
Internet of @ThingsExpo, taking place June 6-8, 2017 at the Javits Center in New York City, New York, is co-located with the 20th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. @ThingsExpo New York Call for Papers is now open.
Dec. 3, 2016 01:00 PM EST Reads: 1,852
The 20th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held June 6-8, 2017, at the Javits Center in New York City, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Containers, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal ...
Dec. 3, 2016 11:30 AM EST Reads: 2,068
You have great SaaS business app ideas. You want to turn your idea quickly into a functional and engaging proof of concept. You need to be able to modify it to meet customers' needs, and you need to deliver a complete and secure SaaS application. How could you achieve all the above and yet avoid unforeseen IT requirements that add unnecessary cost and complexity? You also want your app to be responsive in any device at any time. In his session at 19th Cloud Expo, Mark Allen, General Manager of...
Dec. 3, 2016 11:15 AM EST Reads: 1,627
"Dice has been around for the last 20 years. We have been helping tech professionals find new jobs and career opportunities," explained Manish Dixit, VP of Product and Engineering at Dice, in this SYS-CON.tv interview at 19th Cloud Expo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 3, 2016 09:30 AM EST Reads: 832
Application transformation and DevOps practices are two sides of the same coin. Enterprises that want to capture value faster, need to deliver value faster – time value of money principle. To do that enterprises need to build cloud-native apps as microservices by empowering teams to build, ship, and run in production. In his session at @DevOpsSummit at 19th Cloud Expo, Neil Gehani, senior product manager at HPE, discussed what every business should plan for how to structure their teams to delive...
Dec. 3, 2016 08:30 AM EST Reads: 1,359
Rapid innovation, changing business landscapes, and new IT demands force businesses to make changes quickly. In the eyes of many, containers are at the brink of becoming a pervasive technology in enterprise IT to accelerate application delivery. In this presentation, attendees learned about the: The transformation of IT to a DevOps, microservices, and container-based architecture What are containers and how DevOps practices can operate in a container-based environment A demonstration of how ...
Dec. 3, 2016 08:30 AM EST Reads: 729
As we enter the final week before the 19th International Cloud Expo | @ThingsExpo in Santa Clara, CA, it's time for me to reflect on six big topics that will be important during the show. Hybrid Cloud This general-purpose term seems to provide a comfort zone for many enterprise IT managers. It sounds reassuring to be able to work with one of the major public-cloud providers like AWS or Microsoft Azure while still maintaining an on-site presence.
Dec. 3, 2016 04:00 AM EST Reads: 2,722
Without lifecycle traceability and visibility across the tool chain, stakeholders from Planning-to-Ops have limited insight and answers to who, what, when, why and how across the DevOps lifecycle. This impacts the ability to deliver high quality software at the needed velocity to drive positive business outcomes. In his general session at @DevOpsSummit at 19th Cloud Expo, Phil Hombledal, Solution Architect at CollabNet, discussed how customers are able to achieve a level of transparency that e...
Dec. 3, 2016 02:15 AM EST Reads: 770
Much of the value of DevOps comes from a (renewed) focus on measurement, sharing, and continuous feedback loops. In increasingly complex DevOps workflows and environments, and especially in larger, regulated, or more crystallized organizations, these core concepts become even more critical. In his session at @DevOpsSummit at 18th Cloud Expo, Andi Mann, Chief Technology Advocate at Splunk, showed how, by focusing on 'metrics that matter,' you can provide objective, transparent, and meaningful f...
Dec. 3, 2016 01:45 AM EST Reads: 4,538
Between 2005 and 2020, data volumes will grow by a factor of 300 – enough data to stack CDs from the earth to the moon 162 times. This has come to be known as the ‘big data’ phenomenon. Unfortunately, traditional approaches to handling, storing and analyzing data aren’t adequate at this scale: they’re too costly, slow and physically cumbersome to keep up. Fortunately, in response a new breed of technology has emerged that is cheaper, faster and more scalable. Yet, in meeting these new needs they...
Dec. 3, 2016 12:15 AM EST Reads: 1,761
@DevOpsSummit taking place June 6-8, 2017 at Javits Center, New York City, is co-located with the 20th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. @DevOpsSummit at Cloud Expo New York Call for Papers is now open.
Dec. 2, 2016 10:30 PM EST Reads: 1,739
Logs are continuous digital records of events generated by all components of your software stack – and they’re everywhere – your networks, servers, applications, containers and cloud infrastructure just to name a few. The data logs provide are like an X-ray for your IT infrastructure. Without logs, this lack of visibility creates operational challenges for managing modern applications that drive today’s digital businesses.
Dec. 2, 2016 08:00 PM EST Reads: 1,553
Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more business becomes digital the more stakeholders are interested in this data including how it relates to business. Some of these people have never used a monitoring tool before. They have a question on their mind like “How is my application doing” but no id...
Dec. 2, 2016 04:45 PM EST Reads: 2,124
Information technology is an industry that has always experienced change, and the dramatic change sweeping across the industry today could not be truthfully described as the first time we've seen such widespread change impacting customer investments. However, the rate of the change, and the potential outcomes from today's digital transformation has the distinct potential to separate the industry into two camps: Organizations that see the change coming, embrace it, and successful leverage it; and...
Dec. 2, 2016 03:30 PM EST Reads: 3,212
In IT, we sometimes coin terms for things before we know exactly what they are and how they’ll be used. The resulting terms may capture a common set of aspirations and goals – as “cloud” did broadly for on-demand, self-service, and flexible computing. But such a term can also lump together diverse and even competing practices, technologies, and priorities to the point where important distinctions are glossed over and lost.
Dec. 2, 2016 03:15 PM EST Reads: 1,457
Keeping pace with advancements in software delivery processes and tooling is taxing even for the most proficient organizations. Point tools, platforms, open source and the increasing adoption of private and public cloud services requires strong engineering rigor – all in the face of developer demands to use the tools of choice. As Agile has settled in as a mainstream practice, now DevOps has emerged as the next wave to improve software delivery speed and output. To make DevOps work, organization...
Dec. 2, 2016 01:30 PM EST Reads: 5,707
In his session at 19th Cloud Expo, Claude Remillard, Principal Program Manager in Developer Division at Microsoft, contrasted how his team used config as code and immutable patterns for continuous delivery of microservices and apps to the cloud. He showed how the immutable patterns helps developers do away with most of the complexity of config as code-enabling scenarios such as rollback, zero downtime upgrades with far greater simplicity. He also demoed building immutable pipelines in the cloud ...
Dec. 1, 2016 09:00 PM EST Reads: 1,728