[asterisk-users] Server Setup Advice

[Gordon Henderson]

On Sun, 8 Mar 2009, Elliot Murdock wrote:

> Hello!
>
> There will be disk writing in these areas:
> 1. Logs
> 2. CDRs
> 3. MYSQL Call logs
> 4. Faxes and voicemail

I'd not consider these to be a heavy load myself...

> Also, there will be a lot of codec encoding/decoding from/to the PRI
> devices, which is my main concern with CPU load.

Why are you transcoding? Are your extension users remote? If you set ulaw 
or alaw to be the codec (depending on country) used by the extensions 
there won't by any transcoding at all.

Gordon


> Cheers,
> Elliot
>
> On Sun, Mar 8, 2009 at 7:56 PM, Gordon Henderson
> <gordon+asterisk at drogon.net> wrote:
>> On Sun, 8 Mar 2009, Elliot Murdock wrote:
>>
>>> Hello!
>>>
>>> Oh, yes, I will be mirroring the harddrives in case of any failures.
>>>
>>> What is your opinion about using (software) RAID?  Do you think the
>>> overhead impacts performance too much?
>>>
>>> In an ideal situation, I would use hardware RAID, but that is not
>>> feasible right now.
>>
>> I've used Linux software RAID for over 10 years now. for me, it's my first
>> choice.
>>
>> You shouldn't be doing many disk writes though - unless you're recording all
>> calls or handling a vast amount of voicemail.
>>
>> And with modern hardware there shouldn't be issues that we had in the bad
>> old days - DMA, PIO, etc.
>>
>> There is a double on resources required to write a block to a software
>> RAID-1 (mirror) unit but in a modern system, you're not going to notice it.
>>
>> And FWIW: I regularly have systems with 20-40 extensions running on a 1GHz
>> VIA processor, so CPU wise, you've got more than enough - unless you're
>> transcoding
>>
>> Gordon
>>
>>
>>>
>>> Thanks,
>>> Elliot
>>>
>>> On Sun, Mar 8, 2009 at 4:26 PM, Jay Milk <ast-users at skimmilk.net> wrote:
>>>>
>>>> Elliot Murdock wrote:
>>>>>
>>>>> Hello Everybody!
>>>>>
>>>>> I am currently setting up an Asterisk server for medium to high load
>>>>> (approximately 20-35 concurrent phone lines).
>>>>>
>>>>> Do you think the following specs will sufficiently satisfy this system?
>>>>>
>>>>> CPU: XeonQC3220 2.4GHZ 8M
>>>>> RAM: 2X2GB/800
>>>>> Harddrive: 1X250GB
>>>>>
>>>>> I could add harddrives and partition them into /var and /log
>>>>> directories to help with diskdrive throughput.
>>>>>
>>>>> Thanks!
>>>>> Elliot
>>>>>
>>>>>
>>>> I'm sure this is common sense, but make sure you have a plan B for when
>>>> that HD fails.  It will.
>>>>
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