[Asterisk-Users] Help needed

[tim panton]

On 7 Mar 2005, at 12:10, igil at europesip.com wrote:

>
> Hello all,
>
> I Have to install an asterisk based PBX on a large Bussines, about 200 
> extensions, where the phone is a very critical service, this bussines 
> need to be called and call the whole day.
>
> I am thinking to install two asterisk servers with the same config, 
> and if one of them will be broken the otrer one takes the control of 
> all the calls.
>
> Actualy, I do not know how would be the best way to do that, via 
> hardware (buying a especific machine)(witch one), via software (for 
> example rsinc, or witch software soulh I use), or other vay.
>
> What do you think about that?
> Witch way do you prefer?
> How do you do that?
>
> Any clue will be wellcomed.

Ah, It depends on a few factors.
	1) What is an acceptable downtime ?
	2) What is an acceptable frequency of downtime ?
	3) What technical resources are available on/off site?
	4) How much is it worth ?

Others will no doubt chime in with higher-end solutions, but consider 
this
as a basic starting point:
	Lets assume that acceptable downtime is Max 4 hours and acceptable 
frequency is once
every 2 years. Also let's say there are competent PC staff on site, but 
no Linux skills. Finally
imagine that the customer says that it's worth $5k/pa to hit those 
targets.
	The easiest way to do this is to buy quality hardware (MTBF of 5 years 
say), create a
good backup scheme and train the onsite folks how/when to do a restore. 
Then either buy a
duplicate system and put it in a cupboard or sign a 2 hour maintenance 
contract with a
hardware vendor.

This way, when they have a problem, they wheel out the spare, load the 
backup,
swap the cables and away you go.

The _huge_ advantage of this is simplicity. I know a high availability 
site where 2 out of the
3 failures in 5 years were directly related to misconfigured HA :-) My 
favorite was when
the license for the 'robust' filesystem expired !

Tim.


>
> Ismael.
>
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users at lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
http://www.westhawk.co.uk/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/enriched
Size: 2466 bytes
Desc: not available
Url : http://lists.digium.com/pipermail/asterisk-users/attachments/20050307/cd86e58a/attachment.bin