Availability
Availability Availability of a site shows if a site is accessible from the Internet.

Availability of a site shows if a site is accessible from the Internet. This term is also about access to a server, database or another entity. As all objects in the Internet are based on comlicated infrastructure, nothing can be available always. The question is how to measure it, what is normal and if we may affect it anyway. The measurement of availability is connected to terms Uptime and Downtime, which show for how long a site is unavailable. However, these values can not create the full view of the situation. There could be many reasons of unavailability - server or connection problems, application error, overload of the site and so on. To avoid or shorter the failures, it is needed to supervise the site and analyze the errors, if they happen. For these purposes there are special monitoring tools, which help to increase to availability of the site, collect statistics and provide necessary information about the errors for fast repair. These tools are called Website Monitoring services.

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  • CM.Glossary.Uptime
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Very usefull service, helps us to monitor activity of our sites.

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- A.
Some secrets of content monitoring

HostTracker provides the best practice for monitoring both content changes and website availability. HostTracker’s tools allow you to check whether your webpage loads correctly and test it for errors as frequently as you’d like. Additionally, you'll know:

▶ Why do we need that?

▶ Service Settings;

▶ Content Check Methods.

HostTracker provides the best practice for monitoring both content changes and website availability. HostTracker’s tools allow you to check whether your webpage loads correctly and test it for errors as frequently as you’d like. Moreover, our service will be the best assistance in tracking websites with complex structure.

Why do we need that?

With “Content Check” you can spot the presence/absence of specific words on your page, as well as, to monitor the integrity of the website. However, it shows that it is insufficient to enable clear conclusions about the webpage performance. And there will certainly come a point in the life when questions like these arise: “Does the data load completely from the database?” “Are there any missing items on my page?” “What if my website is being hacked right now?” etc.

Little time for writing a simple script on your site - and you can check whatever you want. Server scripts come in handy when there is a need to keep an eye on any changes in website performance. To illustrate, you can write a script which will display “OK” provided everything is operating fine or there is enough disk space. If it happens that the website seems to be available, but actually “Error connect to mysql” pops up, then it’s highly recommended to tune the monitoring function for tracking the absence of a word, in particular, the word “Error”. To the boot of all that, this function can be used as a stopgap to identify obscene comments or suspicious activity until more sophisticated alternatives can be found. Notably, unwanted activity can be tracked by detecting the keywords of virus scripts.

The “Content Check” tool is easy to use and the results are crystal-clear for understanding. Moreover, our service is cloud-based, so you don’t need to install any additional software. Interestingly, the same check let hit HTTP load-testing and collects all statistics you need. Simultaneously, you can carry on website speed and response time tests and, by extension, pinpoint whether your IPs is blacklisted with one of nearly seventy DNS based blacklists.

Service Settings

Are you ready to start monitoring your website content? Let’s go! First and foremost, type the URL of your website into the space provided (or click on “Add list” - if you need to monitor a bulk of websites). Please, pay attention to the “Content Check” field – complete blank space with keywords you wish to monitor, use commas to separate words. It’s worth noting that HostTracker will keep you always updated on your webpage performance, and if, for instance, the presence/absence status of the certain phrases ever changes, you’ll be notified immediately by email and/ or by phone.

Additionally, there are some additional content monitoring options. The first advantage of using them is that, they give you the opportunity to choose only words or phrases that you want/don’t want to show on your website. The second advantage is that, in case of defining a series of keywords, both the disappearance of all words and a single one cause the error. A tick next to “Follow redirect” reflects that the request is forwarded to the target page (defined in the Redirection).

Methods

For more configuration options, click on “Advanced options” drop-down list. Make sure your desired method is set up in the “HTTP method” area.

Available HTTP methods:

  • GET (default parameter value) - is used to retrieve information from the Request-URI for keywords search.

  • POST – gets a content body used to send specific parameters and data.  It tests the functionality and correctness of the website forms.

To sum up, HostTracker incorporates a lot of powerful tools - you're bound to find something you'll like!

 

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The main feature of HostTracker monitoring service is the regular checks of web sites with monitoring intervals from 1 minute. Moreover, the HostTracker’s dedicated global monitoring checkpoints network currently includes more than 140 servers all over the world.

The main feature of HostTracker monitoring service is the regular checks of websites with monitoring intervals from 1 minute. Moreover, the HostTracker’s dedicated global monitoring checkpoints network currently includes more than 140 servers all over the world.

Each test is simulating the visit of a real user. If this imaginary visitor is able to load the site – everything is ok, otherwise – the site is revised again by a certain algorithm (just to be sure). Then, if an error was identified, it is recorded in the database and the notification of unavailability is sent. This is the easiest way to check the site’s availability. If you are interested, HostTracker has a great deal of more sophisticated tests to offer.

Types of tools for web accessibility evaluation

Here are some quick checks you can start with immediately that will move your web site toward better accessibility. It is worth noting that these checks support different protocols.

For example:

  • HTTP - this is an ordinary request, which is obtained from the user's browser.
  • Ping – helps to test site or server network connectivity. 
  • TCP-port - tests the site-to-application connectivity.
  • Database Check - a health check which can ensure that the web server can connect to the database and can also help in monitoring of other vital features. For those seeking a possibility to check the data on the page, there is a content check function. In this case, the virtual client is not just logging in, but also looking for the presence or absence of certain words and phrases. This feature helps you to detect whether some important section of the text has been lost. Moreover, it helps you to spot any mistakes on the page at once.
  • With HostTracker service you can also monitor the response and loading time of your web site. Furthermore, the corresponding data is being written to the inspection logs.

Armed with all these tests, you’ll be eager to collect extensive and thorough information about your web site. You’ll be entitled to know when, why and how did your web site stop working. For example, when the network, server or web site itself are down. Moreover, by using HostTracker, you can immediately detect when web site performance goes down and omit causing any inconveniences for your users. Or even more – you can easily recognize when some data isn’t regularly retrieved from the database. All these tools can help you pinpoint and rectify performance and speed issues with any publicly available web site. It, definitely, saves your time! And, in this case, downtime is small.

Interesting fact:

Almost all HostTracker’s customers are eager to reach 99% or higher uptime. By the way, the data from this service could be a good support in your future confrontations with hosting partner. Truly, many HostTracker’s customers have found a reliable web hosting partner or made him fulfill all promises and commitments according to the contract.

Most Internet service providers and web servers use these blacklists to detect IPs linked to computers with pervading spam or unwanted activity. And the problem is: you can be blacklisted accidentally and be unaware about it. If it happens, your rankings will go down or disappear entirely. You can be truly innocent of any deliberate wrongdoing and still be on the list. For example, if you share your web hosting with someone unreliable. With this monitoring function you can be always aware if your company’s domain name is blacklisted and be ready to deal with it. You're likely to come across contacting the list by email or passing through some sort of automatic procedures in order to prove that you are not a robot when you’ll be trying to get off a blacklist.

HostTracker service settings

All above-mentioned checks teem with the wide variety of options:

  • Maintenance planning and scheduling – allows you, for instance, not to catch the errors during the server upgrade period.
  • Checks from a particular location- as outlined above, there is a huge network of global monitoring checkpoints, and it is possible to choose only regions with potential clientele:

  • Delay alerts – this option will postpone alert notifications for a specified time span; manage notifications in line with the importance of issues; control the life cycle of both alerts and their notifications.

As regards alert notifications option, clients will find themselves spoiled for choice. HostTracker provides notifications via e-mail, SMS and, by extension, via Skype, Viber, Hangouts and voice call. The most striking one - POST request. There is a possibility to send a request to a specific web server (e.g. to restart the web site automatically).

HostTracker service has an API, which allows pieces of software to interact. It is considered as a contract provided by one piece of computer software to another.

The next HostTracker’s advantage is that the service doesn’t require a lot of system resources (e.g. installation any client software). Almost all features are operating using cloud services, and can be configured with only HostTracker’s web site tools. And service settings, definitely, won’t take much time!

Generally speaking, the service is still being developed, as well as, the monitoring network expands, new tools pop up and so on. Considering new tools, they are being developed in response to the requests made by clients. Please don’t hesitate to contact HostTracker’s admins if you have any further suggestions about extra tools which yet aren’t provided by the service.

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