No subject
Thu Jan 15 22:29:28 CST 2009
potentially starting to see problems... <br><br>FYI, not sure if it's o=
f use to you... but... The digium tc400b is a transcoder card that can offl=
oad upto 120 channels of transcoding for g729 <-> ulaw... It's av=
ailable as PCI only, but, if that's OK, it could be an alternative to r=
eplacing your server... G729 licenses are not needed when using that card..=
.<br>
<br>There have been posts by some people about having multiple CPU machines=
but finding that asterisk's load wasn't spread over those CPUs ver=
y well... I'm not sure if they had something special happening that cau=
sed their symptoms, but, from your dual core machine you should be able to =
see whether or not the load is already being spread across the 2 cores OK w=
ith your workload...<br>
<br>d<br><br><div class=3D"gmail_quote">2009/3/27 Mike <span dir=3D"ltr">&l=
t;<a href=3D"mailto:list at virtutel.ca">list at virtutel.ca</a>></span><br><b=
lockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, 20=
4, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Thanks that`s great info, and I've already subscribed to the HA mailing=
<br>
list.<br>
<br>
I understand call handling takes little CPU, but half my calls are<br>
transcoded from ulaw to g729 and vice versa. =C2=A0That seems to take my si=
ngle<br>
CPU, dual-core 2.5Ghz machine up to ~35% CPU utilization. =C2=A0I imagine<b=
r>
doubling what happens on my server would take me dangerously close to the<b=
r>
upper limit of good call quality.<br>
<br>
Am I complete off?<br>
<font color=3D"#888888"><br>
Mike<br>
</font><div><div></div><div class=3D"h5"><br>
> -----Original Message-----<br>
> From: <a href=3D"mailto:asterisk-users-bounces at lists.digium.com">aster=
isk-users-bounces at lists.digium.com</a> [mailto:<a href=3D"mailto:asterisk-u=
sers-">asterisk-users-</a><br>
> <a href=3D"mailto:bounces at lists.digium.com">bounces at lists.digium.com</=
a>] On Behalf Of David Backeberg<br>
> Sent: Thursday, March 26, 2009 18:40<br>
> To: Asterisk Users Mailing List - Non-Commercial Discussion<br>
> Subject: Re: [asterisk-users] Asterisk multi-cpu<br>
><br>
> On Thu, Mar 26, 2009 at 3:06 PM, Mike <<a href=3D"mailto:list at virtu=
tel.ca">list at virtutel.ca</a>> wrote:<br>
> > Hi,<br>
> ><br>
> > I know somebody is going to give me the link to the wiki hardware=
pages,<br>
> but<br>
> > I can't find the answer there. I'd like to know if, for a=
n Asterisk only<br>
> > system (nothing else of note running on it), I get a real gain fr=
om<br>
> having 2<br>
> > CPUs.<br>
> ><br>
> > Does the amount of traffic/SIP registrations/codec translation po=
ssible<br>
> > doubles with 2 CPUs? (each quad core E5420 to be precise)? Does i=
t<br>
> increase<br>
> > by 50%?=C2=A0 It is only a marginal increase, or none at all?<br>
><br>
> You don't say anything about your possible kind of usage, so it=
9;s<br>
> difficult to provide any specific answer to your question. In general,=
<br>
> a few things are true:<br>
> * asterisk is multi-threaded<br>
> * linux kernel has nice job schedulers and i/o schedulers<br>
> * if you have more ram, more things will get cached in ram<br>
> * if you have more cpus / cores you can do more things at once as long=
<br>
> as they aren't all idle waiting for some resource constraint<br>
><br>
> You need to run a LOT of traffic through a server if it's just<br>
> straight call handling, with a minimum of disk-bound i/o or<br>
> transcoding, before you're going to max out modern hardware. So ju=
st<br>
> buy the best server you want to buy, but save some money for a good<br=
>
> warranty, or buy two servers if that's cheaper than what it would =
cost<br>
> to be down.<br>
><br>
> If you want more in-depth discussions on this you probably would<br>
> prefer the asterisk-ha-clustering list:<br>
> <a href=3D"http://lists.digium.com/mailman/listinfo/asterisk-ha-cluste=
ring" target=3D"_blank">http://lists.digium.com/mailman/listinfo/asterisk-h=
a-clustering</a><br>
><br>
> _______________________________________________<br>
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<br>
<br>
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</div></div></blockquote></div><br>
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