[SR-Users] Dispatcher alg:7 not working accordingly

Mon Jun 4 12:16:06 CEST 2012

Thanks Sir,

Thats what I expected. Do you think this will change if I use only two
values with huge difference in each other, lets say {26000,29000} ?

Regards,
Sammy

On Mon, Jun 4, 2012 at 3:05 PM, Carsten Bock <carsten at ng-voice.com> wrote:

> Hi,
>
> this functionality uses a generic "hash" function to generate an
> Integer-Value of the PVAR and then reduces this to the number hosts in
> your destination set.
> If you have only using two different values of the PVAR and only two
> hosts in the dispatcher list, it can likely happen, that the same host
> is choosen. You should try a wider range of values for your PVAR...
> (e.g. try 1000 different values), then you should see a distribution.
>
> Carsten
>
> 2012/6/4 SamyGo <govoiper at gmail.com>:
> > Hi,
> >
> > No, nothing at all. I haven't went too deep into debug logs but no
> internal
> > error was appearing. Everything was as calm as ever and I only get one
> > destination uri.
> >
> > So maybe what I'm getting from your email is that , for this to work the
> way
> > I expect is to have more unique and random values in my hash_pvar to get
> the
> > required functionality.
> >
> > Thanks once again,
> > BR
> > SG
> >
> > On Mon, Jun 4, 2012 at 11:52 AM, Daniel-Constantin Mierla
> > <miconda at gmail.com> wrote:
> >>
> >> Hello,
> >>
> >> do you get any errors in the log?
> >>
> >> Be aware that hash functions may return same code for different input
> >> values. A hash function is guaranteed to return same code for same
> input
> >> value, but there can be collisions of codes for different values.
> >>
> >> Cheers,
> >> Daniel
> >>
> >>
> >> On 6/3/12 3:41 PM, SamyGo wrote:
> >>
> >> Hello,
> >>
> >> I'm having trouble using algorithm 7 in dispatcher module. Here is my
> >> kamailio version. The problem is that despite multiple dispatcher
> entries
> >> corresponding to one set all calls go only to only one destination.
> >>
> >>
> >> [root at control1 ~]# kamailio -V
> >> version: kamailio 3.2.3 (x86_64/linux) 59f87e
> >> flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS,
> >> DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC,
> >> DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE,
> >> USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
> >> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16,
> >> MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 4MB
> >> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
> >> id: 59f87e
> >> compiled on 18:04:08 Apr 19 2012 with gcc 4.1.2
> >> [root at control1 ~]#
> >>
> >> Here is the dipacther module params.
> >>
> >>
> >>
> >> # ------- Load-balancer params ------
> >> modparam("dispatcher", "db_url", DBURL)
> >> modparam("dispatcher", "table_name", "dispatcher")
> >> modparam("dispatcher", "setid_col", "setid")
> >> modparam("dispatcher", "destination_col", "destination")
> >> modparam("dispatcher", "force_dst", 1)
> >> modparam("dispatcher", "flags", 3)
> >> modparam("dispatcher", "dst_avp", "$avp(i:271)")
> >> modparam("dispatcher", "cnt_avp", "$avp(i:273)")
> >> modparam("dispatcher", "ds_ping_from", "sip:proxy at 109.XXX.2XX.XX")
> >> modparam("dispatcher", "ds_ping_interval",15)
> >> modparam("dispatcher", "ds_probing_mode", 1)
> >> modparam("dispatcher", "ds_ping_reply_codes",
> >> "class=2;code=403;code=404;code=484;class=3")
> >> modparam("dispatcher", "hash_pvar", "$avp(i:274)")
> >> modparam("dispatcher", "ds_hash_size", 9)
> >> modparam("dispatcher", "ds_hash_initexpire", 60)
> >>
> >>
> >>
> >> Below is the function call based on avp(i:274)
> >>
> >>
> >>
> >> avp_db_query("select uid from uid_did_map where accountcode =
> >> '$fU'","$avp(i:274)");
> >> xlog("L_INFO","$rm from $fu (IP:$si:$sp) ---------
> >> UID:'$avp(i:274)-----------'\n");
> >>         ds_load_update();
> >>         if(!ds_select_dst("1","7")) {
> >>                         sl_send_reply("500", "No destination
> available");
> >>                         xlog("route[MAIN] : $rm : No destinations
> >> available for $rd");
> >>                         exit;
> >>         }
> >>
> >>
> >> I'm getting two different values for avp(i:274) {26,29} but the
> >> destination are not hashed on its base.
> >>
> >> Please help.
> >>
> >> Regards,
> >> Sammy G.
> >>
> >>
> >>
> >> _______________________________________________
> >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> >> sr-users at lists.sip-router.org
> >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
> >>
> >>
> >> --
> >> Daniel-Constantin Mierla - http://www.asipto.com
> >> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> >> Kamailio Advanced Training, Seattle, USA, Sep 23-26, 2012 -
> >> http://asipto.com/u/katu
> >> Kamailio Practical Workshop, Netherlands, Sep 10-12, 2012 -
> >> http://asipto.com/u/kpw
> >>
> >>
> >>
> >
> >
> > _______________________________________________
> > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> > sr-users at lists.sip-router.org
> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
> >
>
>
>
> --
> Carsten Bock
> CEO (Geschäftsführer)
>
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