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Newsgroups: comp.lang.python
Date: Tue, 13 Nov 2012 20:14:02 -0800 (PST)
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Subject: Re: Generate unique ID for URL
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Xref: csiph.com comp.lang.python:33298

yeah good point - I have gone with md5 for now.


On Wednesday, November 14, 2012 3:06:18 PM UTC+11, Chris Angelico wrote:
> On Wed, Nov 14, 2012 at 2:25 PM, Richard <richardbp@gmail.com> wrote:
> 
> > So the use case - I'm storing webpages on disk and want a quick retrieval system based on URL.
> 
> > I can't store the files in a single directory because of OS limitations so have been using a sub folder structure.
> 
> > For example to store data at URL "abc": a/b/c/index.html
> 
> > This data is also viewed locally through a web app.
> 
> >
> 
> > If you can suggest a better approach I would welcome it.
> 
> 
> 
> The cost of a crypto hash on the URL will be completely dwarfed by the
> 
> cost of storing/retrieving on disk. You could probably do some
> 
> arithmetic and figure out exactly how many URLs (at an average length
> 
> of, say, 100 bytes) you can hash in the time of one disk seek.
> 
> 
> 
> ChrisA