[Asterisk-Users] Asterisk Hardware Recommendation

[Steve Totaro]

Maybe something like this would be good.

http://www.pcmicrostore.com/PartDetail.aspx?q=p:10502197


----- Original Message ----- 
From: "Matt Roth" <mroth at imminc.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com>
Sent: Friday, April 29, 2005 2:11 PM
Subject: Re: [Asterisk-Users] Asterisk Hardware Recommendation


> Does anyone have experience with using NAS 
> (http://en.wikipedia.org/wiki/Network-attached_storage) or SAN 
> (http://en.wikipedia.org/wiki/Storage_area_network) for this application?
>
> Matthew Roth
> http://voip-info.org/tiki-index.php?page=Running%20Asterisk%20on%20Debian
>
> Daniel Salama wrote:
>
>> Sure.
>>
>> I setup a small lab on a machine with 4 T1s and 36 agents logged in.  The 
>> system was configured to Monitor all outbound calls as well as  monitor 
>> all calls distributed by Queue app (monitor-format setting in 
>> queues.conf).
>>
>> When recording to local disk, everything was working fine. Agents were 
>> busy 99.5% and there were at least 30 calls waiting in Queue to be 
>> distributed. Average call conversation length was about 7.5 minutes.
>>
>> Then I mounted /var/spool/asterisk/monitor via NFS using 10/100 Fast-E.
>>
>> The moment we pushed the load on the Asterisk machine, everything  worked 
>> for about 40 seconds. Then call quality started suffering  significantly. 
>> Chopped audio. Bad audio. No audio. Good audio. You  could imagine. So we 
>> stopped the test.
>>
>> Then we unmounted the NFS drive and repeated the test again. Everything 
>> worked fine again.
>>
>> The machine we tested asterisk on is a dual Xeon 3 GHz with 2G RAM. 
>> During all tests, CPU utilization was about 55% on the average (for  each 
>> CPU). Memory usage was under 1G.
>>
>> I would say I need to try more troubleshooting. Maybe there was 
>> congestion on the Fast-E, although preliminary analysis indicates there 
>> were no CRC errors, collisions, or packet loss.
>>
>> The NFS machine was completely idle.
>>
>> Last, we repeated the test over a 1 hour period. This time, Monitor was 
>> recording on local drives and we were copying files every 15 minutes 
>> with a background process (perl script) to NFS mount point. Everything 
>> worked fine as well.
>>
>> I don't know if these tests are conclusive yet. However, from the 
>> results so far, I would recommend staying away from recording to NFS 
>> mounted point. I will continue running simulations to see if anything 
>> else can be identified.
>>
>> Thanks,
>> Daniel
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