Re: [Networker] SLAs and backup cost estimates

2008-05-14 17:44:36
Subject: Re: [Networker] SLAs and backup cost estimates
From: Valdis Kletnieks <Valdis.Kletnieks AT VT DOT EDU>
Date: Wed, 14 May 2008 17:39:15 -0400
On Wed, 14 May 2008 17:28:54 EDT, Stan Horwitz said:

> I am wondering what other sites do for their SLAs and how you estimate  
> backups and charge for them. I figure the two most important factors  
> to consider are the recovery time objective and the amount of data  
> involved.

We don't currently do SLAs, but something to keep in mind is that for many
systems, there's *3* classifications of data:

1) Stuff we need to get back so we can come up cleanly (the operating system,
the web server, etc).

2) Application data we need *now* (as in "even if we come up clean, it's not
worth it until this data is back")

3) Application data we need *soon* ("We can live till Friday without it...")

You don't want to write an SLA that says "inside 8 hours" for a system with
20T of data, if they can get back up and running with 500G and then restore
the other 19.5T in the background once they're up....

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