# &faqguide;

Does dispatcher provide a fair distribution?

There is no guarantee of that. You should do some measurements to decide what distribution algorithm fits better in your environment.

Is dispatcher dialog stateful?

No. Dispatcher is stateless, although some distribution algorithms are designed to select same destination for subsequent requests of the same dialog (e.g., hashing the call-id).

What happened with the ds_is_from_list() function?

The function was replaced by the more generic ds_is_in_list() function that takes as parameters the IP and PORT to test against the dispatcher list.

ds_is_from_list() == ds_is_in_list("$si","$sp")

How is weight and priority used by the dispatcher in selecting a destination?

The weight of a destination is currently used in the hashing algorithms and it increases the probability of it to be chosen(if we have two destinations with weights 1 respectively 4 than the second one is 4 times more likely to be selected than the other). The sum of all weights does not need to add up to a specific number. It is important to understand that the weights are not used in the round-robin algorithm at the moment.

The priority field is used at ordering the destinations from a set. It does not affect the overall probability of a destination to be chosen. It is reflected when listing the destination, the field can definetly be used in further selecting algorithms.

What happened with the list_file module parameter ?

The support for text file (for provisioning destinations) was dropped. Only the DB support (provisioning via a DB table) is now available - if you still want to use a text file for provisioning, use db_text DB driver (DB emulated via text files)

Where can I find more about &osips;?

Take a look at &osipshomelink;.

Where can I post a question about this module?

First at all check if your question was already answered on one of our mailing lists:

- User Mailing List - &osipsuserslink;

- Developer Mailing List - &osipsdevlink;

E-mails regarding any stable version should be sent to &osipsusersmail; and e-mail regarding development versions or SVN snapshots should be send to &osipsdevmail;.

If you want to keep the mail private, send it to &osipshelpmail;.

How can I report a bug?

Please follow the guidelines provided at: &osipsbugslink;