13 Aug
2009
13 Aug
'09
9:11 a.m.
Hello everyone,
I want to port openSER on an embedded board,I need configure the openser
without MySQL due to space constraint.
So can you let me know whether this is possible also can you give any
reference document on how to port on ARM 9 based boad.
Regards,
Rathndran
<users(a)lists.kamailio.org>
13 Aug
13 Aug
3:45 p.m.
Ratheendran R wrote:
I want to port openSER on an embedded board,I need
configure the openser
without MySQL due to space constraint.
So can you let me know whether this is possible also can you give any
reference document on how to port on ARM 9 based boad.
I don't know that this is really a good idea. While OpenSER is a
relatively "low-level" component of VoIP infrastructure, it is heavily
bound up in the higher layers of abstraction, including the point at
which high-level application delivery happens. It's designed to run on
real servers - at least, to achieve any real scalability. This isn't
the same as PBX appliances.
Beyond that, there aren't too many ways to use OpenSER without database
backing. Why does the database have to be on the same embedded machine
as the proxy itself? Why can't it be centralised on a powerful set of
servers?
To avoid database calls, you'd have to completely abandon use of a
number of critical modules, and put all business logic statically in the
route script. This is something for which it is not very well-suited;
it is not a general-purpose programming language, and doesn't have
many of the commonsensical, every-day primitives relied upon in common
programming, and certainly no elegant or pretty ways to use them when
they are available in some form. It's a highly specialised language.
About the only other thing you can do to pull this off is to use SEAS
(SIP Express Application Server), a Java application server that can be
used with OpenSER to provide request processing using servlet APIs and
techniques. It is, however, commercial, and, being Java and all,
obviously cannot run on the embedded system either.
It is a matter of taste and opinion, of course, but I think your project
is a bad idea. If it must be done, I recommend using a database, albeit
across a network. This is necessary for storage and performance
reasons, as well.
-- Alex
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
3:54 p.m.
13 aug 2009 kl. 15.45 skrev Alex Balashov:
Ratheendran R wrote:
In some cases, it's a really good idea ;-)
Some of the WRTG distros already use one version of SER in their
systems as an ALG, application level gateway.
And yes, MySQL is not a requirement at all. It's just a matter of what
you want to do. Check the documentation - we have a lot of it - and
you will even find drivers for text-based configurations. Daniel can
comment on the state of these, I'm sure.
/O
I want to port openSER on an embedded board,I
need configure the
openser without MySQL due to space constraint.
So can you let me know whether this is possible also can you give
any reference document on how to port on ARM 9 based boad.
I don't know that this is really a good idea. While OpenSER is a
relatively "low-level" component of VoIP infrastructure, it is
heavily bound up in the higher layers of abstraction, including the
point at which high-level application delivery happens. It's
designed to run on real servers - at least, to achieve any real
scalability. This isn't the same as PBX appliances.
3:59 p.m.
Olle E. Johansson wrote:
In some cases, it's a really good idea ;-)
Some of the WRTG distros already use one version of SER in their systems
as an ALG, application level gateway.
A bizarre, but understandable application of it, I suppose.
And yes, MySQL is not a requirement at all. It's
just a matter of what
you want to do. Check the documentation - we have a lot of it - and you
will even find drivers for text-based configurations. Daniel can comment
on the state of these, I'm sure.
Yep, if you want to use OpenSER/Kamailio for some purpose that does not
require dynamic information and so on, it is quite possible to do it
without using a database.
However, I assumed that since the question was posed in this manner,
there was an underlying assumption that things requiring a database need
to be done. Otherwise, why even ask the question; in that case, it
ought to be self-evident that there is no need to use a database to
begin with, let alone MySQL.
-- Alex
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
7:47 p.m.
On 13.08.2009 15:54 Uhr, Olle E. Johansson wrote:
13 aug 2009 kl. 15.45 skrev Alex Balashov:
db_text module (in 1.5 or later, named dbtext previously) should be
pretty stable, I am not aware of misbehaviors. However, I haven't tested
with heavy data, e.g., storing presence documents, but for auth,
location, a.s.o. it has been used a lot.
Cheers,
Daniel
Ratheendran R wrote:
In some cases, it's a really good idea ;-)
Some of the WRTG distros already use one version of SER in their
systems as an ALG, application level gateway.
And yes, MySQL is not a requirement at all. It's just a matter of what
you want to do. Check the documentation - we have a lot of it - and
you will even find drivers for text-based configurations. Daniel can
comment on the state of these, I'm sure.
I want to port openSER on an embedded board,I
need configure the
openser without MySQL due to space constraint.
So can you let me know whether this is possible also can you give
any reference document on how to port on ARM 9 based boad.
I don't know that this is really a good idea. While OpenSER is a
relatively "low-level" component of VoIP infrastructure, it is
heavily bound up in the higher layers of abstraction, including the
point at which high-level application delivery happens. It's
designed to run on real servers - at least, to achieve any real
scalability. This isn't the same as PBX appliances. 
5:23 p.m.
Alex Balashov schrieb:
Ratheendran R wrote:
I tend to disagree.
You can use Kamailio as proxy and registrar fine without any database.
Just keep registrations in memory. There are scenarios were
authentication is not needed (e.g. closed networks with well known
clients). And for routing purposes a DB is not needed.
regards
klaus
I want to port openSER on an embedded board,I
need configure the
openser without MySQL due to space constraint.
So can you let me know whether this is possible also can you give any
reference document on how to port on ARM 9 based boad.
I don't know that this is really a good idea. While OpenSER is a
relatively "low-level" component of VoIP infrastructure, it is heavily
bound up in the higher layers of abstraction, including the point at
which high-level application delivery happens. It's designed to run on
real servers - at least, to achieve any real scalability. This isn't
the same as PBX appliances. 
5:43 p.m.
Also, for small embedded systems, dbtext works like a charm.
OpenSER works fine on ARM and small embedded systems.
Check out http://svn.nslu2-linux.org/svnroot/optware/trunk/make/openser.mk
More info on the project, here: http://www.nslu2-linux.org/
This is a generic make file that I created to cross compile openser
for several embedded platforms.
Regards,
Ovidiu Sas
On Thu, Aug 13, 2009 at 11:23 AM, Klaus
Darilion<klaus.mailinglists(a)pernau.at> wrote:
Alex Balashov schrieb:
Ratheendran R wrote:
I tend to disagree.
You can use Kamailio as proxy and registrar fine without any database. Just
keep registrations in memory. There are scenarios were authentication is not
needed (e.g. closed networks with well known clients). And for routing
purposes a DB is not needed.
regards
klaus
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I want to port openSER on an embedded board,I
need configure the openser
without MySQL due to space constraint.
So can you let me know whether this is possible also can you give any
reference document on how to port on ARM 9 based boad.
I don't know that this is really a good idea. While OpenSER is a
relatively "low-level" component of VoIP infrastructure, it is heavily bound
up in the higher layers of abstraction, including the point at which
high-level application delivery happens. It's designed to run on real
servers - at least, to achieve any real scalability. This isn't the same as
PBX appliances.
3:49 p.m.
Ratheendran R wrote:
So can you let me know whether this is possible also
can you give any
reference document on how to port on ARM 9 based boad.
Also, what makes you think such a reference document exists?
There's nothing in OpenSER/Kamailio that is overly
architecture-specific. It's mostly standard C with a bunch of POSIX and
BSD and System V-derived system calls.
Are you imagining there is inline assembly in the code, or what?
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
4:19 p.m.
On Donnerstag, 13. August 2009, Alex Balashov wrote:
[...]
There's nothing in OpenSER/Kamailio that is overly
architecture-specific. It's mostly standard C with a bunch of POSIX and
BSD and System V-derived system calls.
Are you imagining there is inline assembly in the code, or what?
Hi Alex,
actually there is some assembly code which is used for fast locking:
https://openser.svn.sourceforge.net/svnroot/openser/branches/1.5/fastlock.h
SCNR. :-)
But it will fallback to the generic (slower) implementation if there is no
specific code available.
Henning
4:25 p.m.
Henning Westerholt wrote:
actually there is some assembly code which is used for
fast locking:
https://openser.svn.sourceforge.net/svnroot/openser/branches/1.5/fastlock.h
SCNR. :-)
Oh.
Well - ausgezeichnet! I stand corrected! :) Now, onto the matter of
specification for the ARM9...
#elif defined __CPU_arm
asm volatile(
"# here \n\t"
"swpb %0, %1, [%2] \n\t"
: "=&r" (val)
: "r"(1), "r" (lock) : "memory"
);
...
#elif defined __CPU_arm
asm volatile(
" str %0, [%1] \n\r"
: /*no outputs*/
: "r"(0), "r"(lock)
: "memory"
);
:)
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
5377
days inactive
5377
days old
9 comments
7 participants
participants (7)
-
Alex Balashov -
Daniel-Constantin Mierla -
Henning Westerholt -
Klaus Darilion -
Olle E. Johansson -
Ovidiu Sas -
Ratheendran R