Servers for E-Business

1

Pertemuan 15


Servers for E
-
Business

Matakuliah

: M0284/Teknologi & Infrastruktur E
-
Business

Tahun


: 2005

Versi


: <<versi/revisi>>


2

Learning Objectives

•
List the components necessary for front
-
end and back
-
end of e
-
commerce
transaction systems

•
Elicit the steps involved in establishing an
e
-
commerce web site.


3

Web Servers

•
A Web Server is a computer and
associated software that is attached full
-
time to the internet.

•
The main software component is HTTP
(HyperText Transfer Protocol) server, to
process http requests.

•
Called httpd in UNIX and https in Microsoft
Windows NT/2000.


4

Constraints in selecting a Web
server in an e
-
commerce project


•
Legacy software

•
Back office

•
Network

•
Administrator preferences

•
Web development skills of the staff


5

Selecting a web server

•
Performance
–

minimum wait time for downloading

•
Development
–

where initial content can be developed
and maintenance is not overly difficult.

•
Security
–

different levels of access rights to the users.

•
Multiple types of CPU, hardware and operating system
should be supported.

•
Multi
-

platform solution
–

for longevity of the system
without being tied to one particular CSP.

•
Clustering capabilities and automatic fail
-
over.

•
Stability and reliability.


6

Functionality Checklist

High performance HTTP engine

•
Connections per second or requests per second

•
Bytes per second

•
Round trip or response time

•
Errors

•
Functional compliance with HTTP version 1.1 or
later.

•
Scalability of the architecture

•
Integration of clustering for fault
-
tolerance, load
balancing and reliability

7

Functionality Checklist (Cont’d)

Interface to the back end applications

•
Common gateway interface (CGI)

•
Cross platform interoperability

•
Java servlets and Java server pages

•
Open database connectivity (ODBC)

•
Remote method invocation (RMI)

8

Functionality Checklist (Cont’d)

•
Publishing capability

•
Management and administration

•
Availability of server for lengthy operations
without interruptions

•
Ability of the web server to add
functionality and to control the website’s
content.

•
Security


9

Web server and
supported

platforms

Apache Web
server

Netbsd, unix, aix, os/2,
windows nt, linux, solaris…

Commerce
server/400

As/400

Microsoft IIS 5+

Windows 2000+

Lotus Domino Go

Unix, os/2, windows NT,
Solaris

iPlanet Enterprise

Unix, AIX, Windows NT…

10

Management issues in selecting a
web server

•
Product feature set, current availability and the
likely product evolution path.

•
Security (trade
-
in with high performance speed)

•
Built
-
in database connectivity and the availability
of application development tools.

•
Manufacturer’s reputation, quality of technical
support, prior experience with a particular
manufacturer.

•
Purchase price, licensing and maintenance cost.


11

Present web server market

•
Apache
–

60 % of market share

•
MS Internet Information Server
–

19 %

•
Netscape Communications Enterprise
server (now iPlanet Enterprise Server)
–

6
%.


12

Apache Web Server

•
From
www.apache.org


•
Available for free

•
Highly reliable and stable

•
Available for many platforms, in both binary and
source code format

•
Since, it is open
-
source, bug
-
fixes are rapid and
timely.

•
Demerits: Production version of server is not
very user friendly, textual user interface.

•
Comanche (Configuration Manager for Apache)
is an effort to have GUI for users, across various
platforms.

13

Microsoft Internet Information
Server

•
From Microsoft a leading supplier of IT.

•
Distributed as a free component with NT server,
tuned for performance on the Intel platform.

•
Personal Web Server (PWS) for small scale
personal use on Windows 95 and 98.

•
IIS runs on a single platform (Intel processors on
Windows NT OS).

•
Many add
-
ins available (database access tools,
e
-
mails, security etc.)

•
Serious security questions

14

IIS and Management console

15

iPlanet Enterprise Server

•
From Netscape Communications (part of AOL now)

•
The Netscape Enterprise administrative console is
intuitive to use, manage and configure.

•
Supports a range of platforms including Sun Solaris and
Windows NT.

•
Highly stable, seldom requires re
-
booting.

•
Comparable to the other two dominant servers in the
market.

•
Configure through Web User Interface (WUI).

•
WUI can be used to set up the server with I.E. or
Netscape Navigator browser.

•
Supports Java applets.


16

IBM Lotus Domino Server

•
From the stable of IBM.

•
Now being supplanted by IBM HTTP
Server powered by Apache.

•
Offers integrated messaging and web
application software platform for growing
companies seeking improved customer
responsiveness and streamlined business
processes.

17

Monitoring Web Server Performance

•
Overall network traffic

•
Performance of web server software and
platforms.

•
The load generator (clients)

•
Workloads

•
Measurement and metrics


18

Performance Planning and Monitoring
Tools

•
Analysis of logs of active servers

•
Instrumentation of network

•
Server operating systems

•
Web software

•
Laboratory testing (benchmark)

19

Sample Monitoring Tools

•
Webstone from Mindcraft

•
WebBench 3.0 by Ziff Davis

•
SPECweb96 from Standard Performance
Evaluation Corporation

•
Web Capacity Analysis Tool (WCAT) and
InetLoad from Microsoft

•
WebSizr and WebCorder from
Technovations


20

Log analysis (for business i
ntelligence
)

•
Recording the date and time a visitor visits and
leaves the page

•
Net.Analysis and CartSmarts from Net.Genesis

•
Aria by Andromedia (part of Macromedia)

•
WebTrends

•
With recent failure of dot coms, log analysis has
become even more important. Number of
software vendors providing these solutions is
increasing rapidly.