Long time ago Ian has purposed a research project. At that time, my own
research project has already begun and was too late to incorporate Ian's
suggestions into my project. However, my project does in some sense measure
the longevity of a document in Freenet (with requests and re-insertions).
My dissertation are available at:
http://www.sysoft.fsnet.co.uk/join.pdf
I am not sure whether the results presented are inline with what one would
have expected from the Freenet's principals and routing mechanism. However,
I was quite shocked while I was doing the simulations. Basically, I found
that Freenet would only be able to utilise it's storage capacity at around
20%, e.g. if all users have altogether shared 100GB of disk space to
Freenet, then there could only be around 20GB of documents stored in the
Freenet.
I originally tried to tidy up the dissertation before making it publicly
available, unfortunately I can never managed to find the time to do so. I
guess all Freenet developers could go straight to chapter 4 of the
dissertation. For completeness, I am also uploading the simulator I used
for the simulations:
http://www.sysoft.fsnet.co.uk/SYSerapis.zip
(I did not have time to tidy up the source code, so it would probably look
very messy and inefficient at the moment.)
And also because of the constraint in time, I did not managed to simulate
Freenets with a much larger limit of the maximum number of dataStore entries
(which would be closer to real world usage)
Any comment should be directed to me, not my supervisor nor my department,
since I am just a student, not a memeber of staff there, and am solely
responsible for the dissertation/simulations.
Thanks.
Yours,
Shu Yan Chan
[EMAIL PROTECTED]
P.S. Please cc a copy of your reponses to my e-mail address, as I would not
be able to check the mailing list in the coming month.
----- Original Message -----
From: "Ian Clarke" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Sunday, April 15, 2001 8:53 PM
Subject: [freenet-tech] Looking for a research project?
>One important issue is that of document longevity in Freenet. The
>current approach basically removes documents on the basis of which was
>least recently accessed, although a bias against large files was
>introducted in version 0.3.
>So one very important question is how long does a document last in
>Freenet (assuming no requests for that document), and how is this
>affected by differences in the size of the document and the HTL with
>which it was inserted
_______________________________________________
freenet-tech mailing list
[EMAIL PROTECTED]
http://lists.freenetproject.org/mailman/listinfo/tech
