DistOS-2011W NTP: Difference between revisions

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=Introduction=
=Introduction=


Describe the system(s) that you examined or compared.  Why did you choose them?  Be sure to specify a thesis that you argue in the rest of the document.  Since this is a report the thesis may be relatively weak; however, an appropriate thesis will help the reader understand why did what you did and why you wrote what you wrote.
1. Introduction:


End with a paragraph outlining the rest of the document.
1.1 Context/Background


Be sure to change the titles of the following sections to match the structure of your paper.  In particular, please try to make them less generic.  What follows is just a suggestion; the document will be evaluated in part on the quality of writing, and good writing sometimes requires some flexibility.
Network Time Protocol (NTP) synchronizes clocks of hosts and routers. According to NIST estimates there are 10-20 million NTP servers and clients deployed in the internet and its tributaries all over the world. NTP software has been ported to almost every workstation and server platform available today – from PCs to Cray’s – UNIX, Windows, VMS and embedded systems, even home routers and battery backup systems.
 
NTP provides nominal accuracies of low tens of milliseconds on WANs, sub milliseconds on LANs and sub microseconds using a precision time source such as cesium oscillator or GPS receiver.  Our  time  protocol  was  designed  over  the LAN  and  our  goal  was  to achieve sub milliseconds of accuracy.
 
1.2 Importance
 
Precision of time is very important in the computer world. Following are some example why it is so important to maintain a precise and accurate time.
 
Network monitoring, measurement and control, Distributed database transaction journaling and logging,  Secure  document  timestamps  with  cryptographic  certification,  Radio  and  TV programming lunch and monitoring, Stock market buy and sell orders, Distributed network gaming and training, etc.
1.3 Definition of the problem
 
My goal was to acquire time accuracy in the Linux lab assuming that all the computers do not have internet connection. To time synchronize all the computers I had to build our own hierarchy of NTP servers and clients.
 
1.4 Summary of the result
 
An efficient  hierarchy  of  NTP  server  and  client  has  been  implemented.  Precision  of
Sub milliseconds were achieved.
 
1.5 Outline of the report
Detailed background information and the structure of our time protocol are provided in Section
2. The development setup and code explanation is reviewed in Section 3. Details of which server/client contains which files are given in section 4. My contributions in this implementation are described in Section 5.


=Systems/Programs in the Space=
=Systems/Programs in the Space=

Revision as of 19:44, 21 February 2011

Introduction

1. Introduction:

1.1 Context/Background

Network Time Protocol (NTP) synchronizes clocks of hosts and routers. According to NIST estimates there are 10-20 million NTP servers and clients deployed in the internet and its tributaries all over the world. NTP software has been ported to almost every workstation and server platform available today – from PCs to Cray’s – UNIX, Windows, VMS and embedded systems, even home routers and battery backup systems.

NTP provides nominal accuracies of low tens of milliseconds on WANs, sub milliseconds on LANs and sub microseconds using a precision time source such as cesium oscillator or GPS receiver. Our time protocol was designed over the LAN and our goal was to achieve sub milliseconds of accuracy.

1.2 Importance

Precision of time is very important in the computer world. Following are some example why it is so important to maintain a precise and accurate time.

Network monitoring, measurement and control, Distributed database transaction journaling and logging, Secure document timestamps with cryptographic certification, Radio and TV programming lunch and monitoring, Stock market buy and sell orders, Distributed network gaming and training, etc.

1.3 Definition of the problem

My goal was to acquire time accuracy in the Linux lab assuming that all the computers do not have internet connection. To time synchronize all the computers I had to build our own hierarchy of NTP servers and clients.

1.4 Summary of the result

An efficient hierarchy of NTP server and client has been implemented. Precision of Sub milliseconds were achieved.

1.5 Outline of the report Detailed background information and the structure of our time protocol are provided in Section 2. The development setup and code explanation is reviewed in Section 3. Details of which server/client contains which files are given in section 4. My contributions in this implementation are described in Section 5.

Systems/Programs in the Space

Give an overview of the area you are examining. What systems/programs are out there?

Evaluated Systems/Programs

Describe the systems individually here - their key properties, etc. Use subsections to describe different implementations if you wish. Briefly explain why you made the selections you did.

Experiences/Comparison (multiple sections)

In multiple sections, describe what you learned.

Discussion

What was interesting? What was surprising? Here you can go out on tangents relating to your work

Conclusion

Summarize the report, point to future work.

References

Give references in proper form (not just URLs if possible, give dates of access).

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