Hi Ra(zvan,
I don't assign any weights, and I use the dispatcher.list file:
1 sip:x.x.x.11:5060
1 sip:x.x.x.12:5060
1 sip:x.x.x.13:5060
When there are only 2 servers in that file, I always get:
DBG:dispatcher:ds_select_dst: alg hash [1], id [1] and dispatcher selects the
2nd entry.
When there are 3 servers - when the dispatcher distributes to all 3
servers, I get
DBG:dispatcher:ds_select_dst: alg hash [0], id [0] before it
dispatches to server1 (x.x.x.11)
DBG:dispatcher:ds_select_dst: alg hash [1], id [1] for x.x.x.12
DBG:dispatcher:ds_select_dst: alg hash [2], id [2] for x.x.x.13
Anyway I did some more tests, and it turns out that the hash algorithm
is very sensitive to the PV.
1. when the input hash_pvar is from this set (my original set that
gave me problems): "061002" "061003" "061005" "061006" "61007"
"061008"
Dispatcher splits them:
Server1: 0
server2: 6
2. if I add a 1 in front of my hash PV - so that the new values are
1"061002", etc. (indentation mark is part of the string)
Server1: 2
Server2: 4
3. If I add another character, so that PVs look like x1"061002"
Server1: 3
Server2: 3
3-3 or 2-4 split is OK of course, but the 0-6 split threw me off. Is
there a "safe" PV (integers, certain combinations, etc.) that I can
use that will give me the best distribution? I can use a lookup table
(like dialplan) to get those.
Thanks,
Matt
------------------------------------------------------------------------
Date: Fri, 3 Feb 2012 00:36:37 +0200
From: razvancrai...@opensips.org
To: users@lists.opensips.org
Subject: Re: [OpenSIPS-Users] dispatcher problem
Hi, Matt!
So for different hashed strings like:
DBG:dispatcher:ds_hash_pvar: Hashing "061002"!
you always get the same output:
DBG:dispatcher:ds_select_dst: alg hash [1], id [1]
Also, are you assigning different weights for any of the Asterisk?
Regards,
--
Ra(zvan Crainea
OpenSIPS Developer
http://opensips-solutions.org/
On 02/03/2012 12:16 AM, Matt Hamilton wrote:
Hi Ra(zvan,
Yes, I'm using the same hashing values - the values I assign to the PV are
also
passed to the ds_select_dst correctly as far as I can see. Here is a typical
debug output:
DBG:dispatcher:ds_hash_pvar: Hashing "061002"!
DBG:dispatcher:ds_select_dst: alg hash [1], id [1]
DBG:dispatcher:ds_select_dst: selected [7-1/1]<sip:x.x.x.13:5060>
DBG:dispatcher:ds_select_dst: using entry [1/0]
I ran some test with 3 Asterisk servers with interesting results:
With 3 Asterisk servers specified in dispatcher.list, here is the
distribution:
Server1: 061003
Server2: 061002, 061007, 061008
Server3: 061005, 061006
With only Server1 and Server2 specified in dispatcher.list:
Server1:
Server2: 061002, 061003, 061005, 061006, 61007, 061008
Likewise, with Server1 and Server3, Server3 gets everything.
with Server2 and Server3, Server3 gets everything.
Is there anything I can do to fix this (somehow trick the function assuming
the way I do is the correct way)?
Thanks,
Matt
------------------------------------------------------------------------
Date: Thu, 2 Feb 2012 22:51:46 +0200
From: razvancrai...@opensips.org <mailto:razvancrai...@opensips.org>
To: users@lists.opensips.org <mailto:users@lists.opensips.org>
Subject: Re: [OpenSIPS-Users] dispatcher problem
Hi, Matt!
Are you sure you are not using the same hashing value all the time?
If yes, can you increase your debugging level to 6 and provide
more information? I would be looking in the opensips log for lines
that contain the following strings: "ds_hash_pvar: Hashing " and
"ds_select_dst: alg hash ".
Regards,
--
Ra(zvan Crainea
OpenSIPS Developer
http://opensips-solutions.org/
On 02/02/2012 10:15 PM, Matt Hamilton wrote:
Hi,
I'm using Opensips to dispatch to 2 servers - serverA,
serverB. When one of the servers is down, Opensips is
dispatching to the active one correctly. However, when both of
them are Active, it's picking only one of them and ignoring
the other; e.g.,
when serverB is down, dispatches to serverA
when serverA is down, dispatches to serverB
when both up, dispatches to serverB
while dispatching to serverA when serverB is down, if I
activate serverB, all requests dispatched to serverB
Here is my code:
modparam("dispatcher", "hash_pvar", "$avp(75)")
in the script, I'm setting $avp(75) to one of the following
"061002", "061003", "061004", "061005", "061006" just before
calling ds_select_dst.
$avp(75)=..
ds_select_dst("1", "7");
Any ideas why this is happening?
Regards,
Matt
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