> - Deployment/scalability/falut tolerance/caching/load balancing

We cover this, but not in the detail you want.  There will be an
article on this stuff in the next version of the web magazine O3,
which will cover more scalability issues than we have space for in the
book.

> - Identity management in scalable systems (somewhere I read that the
> visit model might not work?)

I think you're in OK shape with identity up to a fairly high traffic
load, but I don't know of anybody using it on the scale of wikipedia
or Yahoo, and I'm sure you'd have to tweak things to get the
performance you want at those levels.

> - References to database scalability/fault tolerance

This will depend on the database you use, and so I'd point you to the
refferences for Postgres, Oracle, MySQL, and SQL Server.    If you're
planning to need to scale to this level an investment in SQLAlchemy up
front is likely to pay off for you over TurboGears default use of
SQLObject.

> - Security
> - Captcha system

We cover this briefly, but basically you're just using the same
security patterns as you need everywhere -- don't eval anything that
came from a user.  Don't use user generated strings in SQL statments,
etc.   The TurboBlog project has captcha's but we don't cover it in
the book at all.

> - Sending and receiving e-mail

This is done the standard python way.

> - Development methodology (considering agile methodology, TDD, having
> multiple developers)

We are a reference book on TurboGears, but there are a few agile
development tips here and there.

> - Testing, Performance Testing

There's a chapter on this.

> - any other thing needed for high performance complex websites that I
> don't know/remember

The purpose of the book is to get new people up and running quickly,
and to provide a bit of reference documentation for the areas that
need it.   So we aren't focused on the high end of
scalability/complexity.   Right now, the best place to get information
about that kind of stuff is to ask here on the list.

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