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From Henri Gomez <henri.go...@gmail.com>
Subject Re: JK Removing local_worker and local_worker_only directives
Date Tue, 15 Feb 2005 14:25:27 GMT
+1, I was unconfortable to explain these.

Simpler the better


On Tue, 15 Feb 2005 08:58:11 +0100, Mladen Turk <mturk@apache.org> wrote:
> Hi,
> 
> I would like to deprecate the local_worker and local_worker_only
> directives.
> 
> The reason is that we have now shared memory, and thus more powerful
> ways to accomplish it's use.
> 
> Now, we two new directives 'redirect' and 'domain' that are more
> powerful then exiting ones.
> 
> Here is how it works:
> 
> 1. If there is a session the request is routed to the worker.
> 2. If there is no session and the worker is disabled, meaning not
>     accepting new connections then the request is redirected to
>     the 'redirect' router if present or 'domain' if not.
> 3. If there is a session and the worker is in error state and
>     the 'sticky_session_force' is not set then the 'redirect'
>     and 'domain' are checked.
> 4. If there is a session and the worker is in error state and
>     the 'sticky_session_force' is set the 500 is returned.
> 
> Here is the simple state table:
> ('x' means don't care, '-' means not set)
>   ----------------------------------------------------------------
> | worker | session | route | domain | force | err | dis | result |
>   ----------------------------------------------------------------
> | w1     | w1      |   x   |   x    | x     | 0   |  x  | w1     |
>   ----------------------------------------------------------------
> | w1     | w1      |   x   |   x    | 1     | 1   |  x  | 500    |
>   ----------------------------------------------------------------
> | w1     | w1      |   w2  |   x    | 0     | 1   |  x  | w2     |
>   ----------------------------------------------------------------
> | w1     | w1      |   -   |   grp  | 0     | 1   |  x  | grp    |
>   ----------------------------------------------------------------
> | w1     | -       |   -   |   -    | x     | 0   |  0  | any    |
>   ----------------------------------------------------------------
> | w1     | -       |   -   |   grp  | x     | 0   |  0  | grp    |
>   ----------------------------------------------------------------
> | w1     | -       |   -   |   -    | x     | 0   |  1  | !w1    |
>   ----------------------------------------------------------------
> 
> So, basically the local_worker_only will become 'sticky_session_force',
> that is more descriptive meaning of the actual usage.
> 
> Regards,
> Mladen.
> 
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