Welcome!

@DevOpsSummit Authors: Liz McMillan, Dalibor Siroky, Elizabeth White, Stackify Blog, John Rauser

Related Topics: @DevOpsSummit, Linux Containers, Containers Expo Blog

@DevOpsSummit: Article

Web Performance 101 | @CloudExpo @Catchpoint #DevOps #WebPerf #Monitoring

Websites have evolved into a dynamic interface with features and content that are updated regularly

Web Performance 101 - Redirects
By Kameerath Kareem

Websites are no longer just simple HTML pages with static content—they’ve evolved into a dynamic interface with features and content that are updated regularly. Website administrators use different techniques to ensure the user is viewing the latest version of the page or content. When new features are being added to the site, or a webpage resource has been moved to a new location, you don’t want the users to have access these pages. Preventing access can be done with the use of webpage redirects. Incoming HTTP requests can be redirected to another location on the site so the user experience is seamless. Webpage redirects can be used to:

  • Redirect users to the mobile version of the site
  • Redirect users to secured pages
  • Redirect users to the latest version of the resource/content
  • Redirect users to pages specific to their geo location
  • Redirecting canonical URLs

Types of Redirects
There are two main categories of redirects: server-side and client-side. A server-side redirect uses HTTP code to specify the status of the webpage, which enables the server to redirect the user to the valid URL. The common server-side redirects are explained below.

301 – Moved Permanently: When an HTTP request returns a 301 status code, it informs the browser that the requested resource has been permanently moved to a new location and provides the address of the new location. It is usually used when there is a domain change, or to redirect old or non-existent pages to new URLs.

302 – Found: These are temporary redirects that are used when a resource needs to be temporarily served from a different location. For example, if you are making changes to certain pages on your site and don’t want the users to access these pages, then you will need to set up redirects to forward the user to a different page.

307 – Moved Temporarily: These function the same way as a 302 and is used when a page needs to be redirected temporarily, but 302 is only set up when the incoming request is either the HEAD or GET method; in all other instances of a temporary redirect, 307 is the recommended HTTP redirect.

304 – Not Modified: The status code 304 specifies whether the requested resource has been modified since it was last requested. It then redirects the request to fetch the content from cache instead of the server.

Client-side redirects involve the use of meta-refresh or JavaScript to redirect to another URL or to refresh the same page.

Performance Impact of Redirects
Each redirect on a page adds latency to the overall page load time. Too many redirects translate to higher page overhead and this delays the page load. When a user enters a domain into the browser and hits enter, the DNS resolution process is triggered and the domain is resolved to its corresponding IP address in a few milliseconds. If the landing page has another redirect, then the browser repeats the entire DNS resolution process once again to guide the user to the correct webpage. The multiple redirect requests are taxing on the browser resources and slow down the page load.

Webpage load time is also affected by internal redirects; for example, if the page tries to load content from a URL that has been redirected to newer or updated content, then the browser must create additional requests to fetch the valid content. These redirects result in additional round trips between the browser and the web server which pushes the load time higher; the perceived performance is degraded every time the browser encounters a redundant redirect.

Common Redirect Errors
Redirects are usually implemented to optimize SEO, to maintain page ranking and to improve user experience by redirecting users away from outdated pages and serving fresh content. If the redirects are not implemented correctly, it can cause various performance issues that can have a negative impact on the user’s digital experience. Here are some issues caused by redirects:

  • Multiple redirects: The higher the number of redirects on a page, the higher is its page load time. Superficially, adding redirects my not seem like a major roadblock for performance; it is implemented mainly to improve SEO and provide a fluid user experience. The issues surface when there are too many redirects in the page structure. Multiple redirects are a huge overhead to the website and can slow it down significantly.

Consider the data below—the website has 160 objects on the page, out of which 46 are redirects, and this inevitably slows down the site. The page takes almost 13 seconds to fully load.

  • Invalid redirects: There are often instances where the website administrator sets up bulk redirects without verifying the validity of the redirects, the site may also have old redirects that were never cleaned up. This can cause several issues on the site like broken links and 404s.
  • Redirect loop: When there are several redirects on the page that are linked to each other, it creates a chain of redirects which may loop back to the same URL that initiated the redirect. This results in a redirect loop error, like the one displayed below, and the user will not be able to access the site.

Implementing Redirects the Right Way
To ensure user experience is not negatively affected by the redirects on your website, ensure you follow the best practices while implementing them. Here are some points to consider:

  • Avoid redundant redirects: It’s recommended to avoid redirects where possible and to use this method only when absolutely needed. This will cut down unnecessary overhead and improve the perceived performance of the page.
  • Chain redirects: When a URL is linked to another URL, this creates a chained redirect. Each URL added to the chain adds latency to the page. Chained redirects have a negative impact not only on page speed, but also SEO.
  • Clean-up redirects: You may have hundreds of redirects on your website and it could be one of the main factors affecting page speed. Old redirects may conflict with new URLs, or backlinks may cause odd errors on the page. It is recommended to verify all the redirects you have set up and to remove the ones that are no longer needed. Retain the old links that have major referral traffic, while those that are rarely accessed can be removed. This exercise will help improve page speed significantly.

It’s best to minimize the use of redirects; if it is an indispensable part of your SEO strategy, then check the existing redirects before adding new ones, and delete those that are no longer needed. Regularly tracking and maintaining existing redirects on your website should be an important part of site optimization.

The post Web Performance 101 – Redirects appeared first on Catchpoint's Blog - Web Performance Monitoring.

More Stories By Mehdi Daoudi

Catchpoint radically transforms the way businesses manage, monitor, and test the performance of online applications. Truly understand and improve user experience with clear visibility into complex, distributed online systems.

Founded in 2008 by four DoubleClick / Google executives with a passion for speed, reliability and overall better online experiences, Catchpoint has now become the most innovative provider of web performance testing and monitoring solutions. We are a team with expertise in designing, building, operating, scaling and monitoring highly transactional Internet services used by thousands of companies and impacting the experience of millions of users. Catchpoint is funded by top-tier venture capital firm, Battery Ventures, which has invested in category leaders such as Akamai, Omniture (Adobe Systems), Optimizely, Tealium, BazaarVoice, Marketo and many more.

@DevOpsSummit Stories
DX World EXPO, LLC, a Lighthouse Point, Florida-based startup trade show producer and the creator of "DXWorldEXPO® - Digital Transformation Conference & Expo" has announced its executive management team. The team is headed by Levent Selamoglu, who has been named CEO. "Now is the time for a truly global DX event, to bring together the leading minds from the technology world in a conversation about Digital Transformation," he said in making the announcement.
SYS-CON Events announced today that Conference Guru has been named “Media Sponsor” of the 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organizers to pass great deals to great conferences, helping you discover new conferences and increase your return on investment.
DevOps is under attack because developers don’t want to mess with infrastructure. They will happily own their code into production, but want to use platforms instead of raw automation. That’s changing the landscape that we understand as DevOps with both architecture concepts (CloudNative) and process redefinition (SRE). Rob Hirschfeld’s recent work in Kubernetes operations has led to the conclusion that containers and related platforms have changed the way we should be thinking about DevOps and controlling infrastructure. The rise of Site Reliability Engineering (SRE) is part of that redefinition of operations vs development roles in organizations.
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering management. To date, IBM has launched more than 50 cloud data centers that span the globe. He has been building advanced technology, delivering “as a service” solutions, and managing infrastructure services for the past 20 years.
The next XaaS is CICDaaS. Why? Because CICD saves developers a huge amount of time. CD is an especially great option for projects that require multiple and frequent contributions to be integrated. But… securing CICD best practices is an emerging, essential, yet little understood practice for DevOps teams and their Cloud Service Providers. The only way to get CICD to work in a highly secure environment takes collaboration, patience and persistence. Building CICD in the cloud requires rigorous architectural and coordination work to minimize the volatility of the cloud environment and leverage the security features of the cloud to the benefit of the CICD pipeline.
"ZeroStack is a startup in Silicon Valley. We're solving a very interesting problem around bringing public cloud convenience with private cloud control for enterprises and mid-size companies," explained Kamesh Pemmaraju, VP of Product Management at ZeroStack, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Enterprises are adopting Kubernetes to accelerate the development and the delivery of cloud-native applications. However, sharing a Kubernetes cluster between members of the same team can be challenging. And, sharing clusters across multiple teams is even harder. Kubernetes offers several constructs to help implement segmentation and isolation. However, these primitives can be complex to understand and apply. As a result, it’s becoming common for enterprises to end up with several clusters. This leads to a waste of cloud resources and increased operational overhead.
"Infoblox does DNS, DHCP and IP address management for not only enterprise networks but cloud networks as well. Customers are looking for a single platform that can extend not only in their private enterprise environment but private cloud, public cloud, tracking all the IP space and everything that is going on in that environment," explained Steve Salo, Principal Systems Engineer at Infoblox, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Meanwhile, 94% of enterprises are using some form of XaaS – software, platform, and infrastructure as a service.
"CA has been doing a lot of things in the area of DevOps. Now we have a complete set of tool sets in order to enable customers to go all the way from planning to development to testing down to release into the operations," explained Aruna Ravichandran, Vice President of Global Marketing and Strategy at CA Technologies, in this SYS-CON.tv interview at DevOps Summit at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Vulnerability management is vital for large companies that need to secure containers across thousands of hosts, but many struggle to understand how exposed they are when they discover a new high security vulnerability. In his session at 21st Cloud Expo, John Morello, CTO of Twistlock, addressed this pressing concern by introducing the concept of the “Vulnerability Risk Tree API,” which brings all the data together in a simple REST endpoint, allowing companies to easily grasp the severity of the vulnerability. He provided attendees with actionable advice related to understanding and acting on exposure due to new high severity vulnerabilities.
While some developers care passionately about how data centers and clouds are architected, for most, it is only the end result that matters. To the majority of companies, technology exists to solve a business problem, and only delivers value when it is solving that problem. 2017 brings the mainstream adoption of containers for production workloads. In his session at 21st Cloud Expo, Ben McCormack, VP of Operations at Evernote, discussed how data centers of the future will be managed, how the public cloud best suits your organization, and what the future holds for operations and infrastructure engineers in a post-container world. Is a serverless world inevitable?
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buyers learn their thoughts on their experience.
SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, which can process our conversational commands and orchestrate the outcomes we request across our personal and professional realm of connected devices.
DevOps promotes continuous improvement through a culture of collaboration. But in real terms, how do you: Integrate activities across diverse teams and services? Make objective decisions with system-wide visibility? Use feedback loops to enable learning and improvement? With technology insights and real-world examples, in his general session at @DevOpsSummit, at 21st Cloud Expo, Andi Mann, Chief Technology Advocate at Splunk, explored how leading organizations use data-driven DevOps to close their feedback loops to drive continuous improvement.
SYS-CON Events announced today that Evatronix will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Evatronix SA offers comprehensive solutions in the design and implementation of electronic systems, in CAD / CAM deployment, and also is a designer and manufacturer of advanced 3D scanners for professional applications.
Sanjeev Sharma Joins June 5-7, 2018 @DevOpsSummit at @Cloud Expo New York Faculty. Sanjeev Sharma is an internationally known DevOps and Cloud Transformation thought leader, technology executive, and author. Sanjeev's industry experience includes tenures as CTO, Technical Sales leader, and Cloud Architect leader. As an IBM Distinguished Engineer, Sanjeev is recognized at the highest levels of IBM's core of technical leaders.
We all know that end users experience the Internet primarily with mobile devices. From an app development perspective, we know that successfully responding to the needs of mobile customers depends on rapid DevOps – failing fast, in short, until the right solution evolves in your customers' relationship to your business. Whether you’re decomposing an SOA monolith, or developing a new application cloud natively, it’s not a question of using microservices – not doing so will be a path to eventual business failure.
"Cloud4U builds software services that help people build DevOps platforms for cloud-based software and using our platform people can draw a picture of the system, network, software," explained Kihyeon Kim, CEO and Head of R&D at Cloud4U, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Is advanced scheduling in Kubernetes achievable?Yes, however, how do you properly accommodate every real-life scenario that a Kubernetes user might encounter? How do you leverage advanced scheduling techniques to shape and describe each scenario in easy-to-use rules and configurations? In his session at @DevOpsSummit at 21st Cloud Expo, Oleg Chunikhin, CTO at Kublr, answered these questions and demonstrated techniques for implementing advanced scheduling. For example, using spot instances and cost-effective resources on AWS, coupled with the ability to deliver a minimum set of functionalities that cover the majority of needs – without configuration complexity.
As DevOps methodologies expand their reach across the enterprise, organizations face the daunting challenge of adapting related cloud strategies to ensure optimal alignment, from managing complexity to ensuring proper governance. How can culture, automation, legacy apps and even budget be reexamined to enable this ongoing shift within the modern software factory? In her Day 2 Keynote at @DevOpsSummit at 21st Cloud Expo, Aruna Ravichandran, VP, DevOps Solutions Marketing, CA Technologies, was joined by a panel of industry experts and real-world practitioners who shared their insight into an emerging set of best practices that lie at the heart of today's digital transformation.
SYS-CON Events announced today that Synametrics Technologies will exhibit at SYS-CON's 22nd International Cloud Expo®, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Synametrics Technologies is a privately held company based in Plainsboro, New Jersey that has been providing solutions for the developer community since 1997. Based on the success of its initial product offerings such as WinSQL, Xeams, SynaMan and Syncrify, Synametrics continues to create and hone innovative products that help customers get more from their computer applications, databases and infrastructure. To date, over one million users around the world have chosen Synametrics solutions to help power their accelerated business and personal computing needs.
As many know, the first generation of Cloud Management Platform (CMP) solutions were designed for managing virtual infrastructure (IaaS) and traditional applications. But that's no longer enough to satisfy evolving and complex business requirements. In his session at 21st Cloud Expo, Scott Davis, Embotics CTO, explored how next-generation CMPs ensure organizations can manage cloud-native and microservice-based application architectures, while also facilitating agile DevOps methodology. He explained how automation, orchestration and governance are fundamental to managing today's hybrid cloud environments and are critical for digital businesses to deliver services faster, with better user experience and higher quality, all while saving money.
SYS-CON Events announced today that Google Cloud has been named “Keynote Sponsor” of SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Companies come to Google Cloud to transform their businesses. Google Cloud’s comprehensive portfolio – from infrastructure to apps to devices – helps enterprises innovate faster, scale smarter, stay secure, and do more with data than ever before.