Funding Cyrus High Availability

[Earl R Shannon]

Hello,

All that you say is true. But for performance one either
buys bigger and better or multiple machines to spread the
load. Murder allows one to buy multiple machines.

All I am saying is that improving perforance may already
be done. I believe redundancy in the application is more
important at this point.

Regards,
Earl Shannon

Michael Loftis wrote:
> 
> 
> --On Thursday, September 16, 2004 22:14 -0400 Earl Shannon 
> <Earl_Shannon at ncsu.edu> wrote:
> 
>> Hello,
>>
>>
>>> Question:   Are people looking at this as both redundancy and
>>> performance, or just redundance?
>>
>>
>>
>> My $0.02 worth. Performance gains can be found the traditional way, ie,
>> faster hardware, etc.Our biggest need is for redundance. If something
>> goes wrong on one machine we still need to be able to let users use 
>> email.
> 
> 
> Cyrus already has this solved via MURDER, but FWIW, more smaller boxes 
> isolate failures more effectively than one big box, also 
> price/performance is still better at a certain size for any platform, 
> and going up higher on the performance curve has HUGE price jumps.
> 
> There's also the cost of administering multiple separate boxes to think 
> about but carefully planned, this can be managed rather easily.
> 
> The whole 'throw bigger and bigger boxen' at it method of 'scaling' 
> doesn't scale.  You hit the wall.  One box can only do so much, granted 
> you can spend LOTS of money and get pretty big boxes, but at some point 
> it becomes ludicrous -- who would use a Sun E10k/E15k and a whole 
> Symmetrix DMX for just mail?  (and I'm excluding companies like AOL and 
> IBM who actually can afford it and would maybe have a reason to scale to 
> that size)...
> 
> Price/Performance has a curve associated with it, most of us can't 
> afford to always stay at the top end of the curve, and have to be at the 
> middle. Further, does it make sense to re-invest in equipment every year 
> to maintain growth?  No, you should be able to expand, add another box, 
> or two, and that scales fairly well.  Better than the single big box 
> approach.
> 
> 
> ---
> Cyrus Home Page: http://asg.web.cmu.edu/cyrus
> Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
> List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html


-- 
Systems Programmer ,Information Technology Division
NC State University.
http://www.earl.ncsu.edu

Anonymous child "Some people can tell the time by looking at the sun,
		 but I have trouble seeing the numbers."
---
Cyrus Home Page: http://asg.web.cmu.edu/cyrus
Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html