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From Scott Gifford <>
Subject Re: Ways to scale a mod_perl site
Date Fri, 18 Sep 2009 15:56:29 GMT
Tina Mueller <> writes:

> On Wed, 16 Sep 2009, Michael Peters wrote:
>> If you need to store per-session data about a client that the client
>> shouldn't be able to see, then you just encrypt that data, base-64
>> encode it and then put it into a cookie.
> How does the user invalidate that "session"? (in case the cookie leaked
> or something like that). Or how can the website owner log out a certain
> user?

Right, that is the trade-off for improved performance and scalability.
Different trade-offs will make sense for different sites.  For most
sites, the performance and scalability won't matter too much, but for
some it will.

Simple things like timestamping the cookie and expiring it after
awhile can help some, but they will not get you the flexibility of
keeping everything in a database.


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