Website monitoring
Web Design & Development Guide
Website monitoring
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Website monitoring is the process of testing or tracking
(monitoring) how end-users interact with a
website
or
web application. Website monitoring is often used by businesses to
ensure that their customers are able to access their online applications
and perform actions such as searching,
online shopping, checking an account balance, or simply researching.
What for?
By monitoring website and web application performance, IT Departments or
Network Engineers hope to avoid
downtime and keep their applications running. Commonly measured metrics are
response time and availability (or uptime), although both consistency and reliability metrics are starting to gain
popularity.
Inside or outside monitoring
Website monitoring can be done from both inside and outside of
a corporate
firewall. Traditional
Network Management solutions focus on inside the firewall monitoring,
whereas external performance monitoring will test and monitor performance
issues across the
Internet backbone and in some cases all the way to the end-user. External performance monitoring is also known as end-user monitoring or end-to-end
performance monitoring.
Real user monitoring measures the performance and availability experienced
by actual users, diagnoses individual incidents, and tracks the impact of a
change.
What impact?
| If it's up... |
A.K.A... |
It's down... per year |
| 90% |
n/a |
876 hours |
| 95% |
n/a |
438 hours |
| 99% |
two 9's |
87 hours, 36 minutes |
| 99.9% |
three 9's |
8 hours, 45 minutes, 36 seconds |
| 99.99% |
four 9's |
52 minutes, 33.6 seconds |
| 99.999% |
five 9's |
5 minutes, 15.36 seconds |
| 99.9999% |
six 9's |
31.68 seconds |
Various types of protocol
Website monitoring service can check HTTP pages, HTTPS, FTP, SMTP, POP3, IMAP,
DNS, SSH, Telnet, SSL, TCP, PING and a
range of other ports with great variety of check intervals from every 4 hours to
every one minute. Typically, most website monitoring services test your server
anywhere between once-per hour to once-per-minute.
Time performances: for example an HTTP page should answer in less than 1
second (for a download of 16Ko) to be considered as "good".
Various type of monitoring
You may monitor a single page of your website, but you can also monitor a
complete business process (often referred to as multi-step transactions).
Servers around the globe
Website monitoring services usually have a number of servers around the globe
- USA, Europe, Asia, Australia and other locations. By having multiple servers
in different geographic locations, monitoring service can determine if a Web
server is available across different Networks worldwide. The more locations the
better picture on your website availability.
Types of website monitoring
There are two main types of website monitoring
-
Synthetic monitoring also known as active monitoring, and
-
Passive monitoring also known as real monitoring.
Notification options - alerts
As the information brought by website monitoring services is in most cases
urgent and may be of crucial importance, various notification methods, often
known as "alerts" may be used: e-mail, regular and cell phones, SMS, fax,
pagers, etc.
See also
External links
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Web Design & Development Guide, made by MultiMedia | Websites for sale
This guide is licensed under the GNU
Free Documentation License. It uses material from the Wikipedia.
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