Its been a while, but if I recall the number, at 5 9's, that means less
than 5 minutes downtime for the entire year. Being realistic, even in a
perfect environment, is it really possible to have zero issues that
would cause any down time?

Thinking from a clustered network, with clustered servers, etc. what's
the best case for failover on them, 20 seconds?

My thought would be that anything more than 5 9's would be hard to do,
over then entire system.

Just my two coppers....

(Wiki ref on uptime math http://en.wikipedia.org/wiki/Uptime )

-----Original Message-----
From: listbounce (at) securityfocus (dot) com [email concealed] [mailto:listbounce (at) securityfocus (dot) com [email concealed]]
On Behalf Of Kosala Atapattu
Sent: Thursday, February 28, 2008 6:16 AM
To: Scott
Cc: bs7799 (at) securityfocus (dot) com [email concealed]
Subject: Re: Maximum SLA?

A dynamic web page, like a portal service. Which involves Websphere
clustered infrastructure with a DB backend, on a HA clustering.

I just want to know whether there is anybody who managed to achieve 5
9's or more for a setup as above.

Even for a static web page, can you achieve more than 5 9's uptime, for
example 6 9's?

Kosala

On Thu, Feb 28, 2008 at 2:06 PM, Scott <whip (at) supportmenot (dot) com [email concealed]> wrote:
> It really depends on what service you are providing at 5 9's. It is
> relatively easy to publish a simple static web page to 5 9's uptime,
> but a full company IT infrastructure at 5 9's is a different kettle
of fish.
>
> What exactly are you wanting to know?
>
> Cheers,
> Scott
>
>
>
> Need relief from IT support stress?
> http://supportmenot.com
>
>
> -----Original Message-----
> From: listbounce (at) securityfocus (dot) com [email concealed]
> [mailto:listbounce (at) securityfocus (dot) com [email concealed]] On Behalf Of Kosala Atapattu
> Sent: Thursday, 28 February 2008 6:22 PM
> To: bs7799 (at) securityfocus (dot) com [email concealed]
> Subject: Maximum SLA?
>
> Dear All,
>
> Is there anybody in this list who adhere to a SLA of more than
> 99.999% (or 5 9's). What is generally required to achieve a SLA more
> than 5 9's?
>
> --
> Kosala
> --------------------------------------------
> Disclaimer: Views expressed in this mail are my personal views and
> they would not reflect views of the employer.
> --------------------------------------------
> blog.kosala.net
> www.linux.lk/~kosala/
> www.kosala.net
>
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> 4:34 PM
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>

--
Kosala
--------------------------------------------
Disclaimer: Views expressed in this mail are my personal views and they
would not reflect views of the employer.
--------------------------------------------
blog.kosala.net
www.linux.lk/~kosala/
www.kosala.net

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