[Kamailio-Users] lcr module prefix_mode=1

[Alex Balashov]

What about some sort of hashing algorithm that operates on regular 
expression sums or is otherwise tuned by regex elements?

I have no idea what such an algorithm is, but I imagine there exist ways 
to evaluate large lists of regular expressions in a way that is at least 
to some extent non-linear, somewhat in the way that a spell checker works?

Juha Heinanen wrote:

> by accident i sent this message to devel list when i intended to send it
> to users list.
> 
> i'm thinking to speed up lcr load_gws() implementation by storing prefixes
> into hash table.  it would allow load_gws() to execute (if necessary) in
> constant time independent of the number of prefixes.  also, i'm planing
> to make the size of hash table controllable by module parameter.
> 
> the side effect of this is that prefix_mode=1, where prefixes are
> regular expressions, would have to be dropped, because hashing on
> regular expressions makes no sense.
> 
> something close to prefix_mode=1 could be achieved using dialplan module
> to store the regular expressions and return as attribute a gateway
> grp_id.  that could then be used by new load_gws_from_group(grp_id) to
> load gws in the given group.
> 
> any comments on this?  is someone depending on prefix_mode=1?
> 
> by the way, before starting this project, i took a look at opensips
> drouting module, but unfortunately it does not cover many features of
> lcr module that i use in my configurations and thus cannot be used to
> replace lcr module.
> 
> -- juha
> 
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-- 
Alex Balashov
Evariste Systems
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