Re: [Veritas-bu] Synthetic fulls Diff Inc VS cumulative Inc

My guess is that you would get a performance boost using cumulative, because NBU would only have to "splice" two backups. The full and the one cumulative versus the full and a week's worth of differentials. You also get the added advantage of if a tape fails you're covered (unless its your most recent.) Of course, you also get longer backup windows for the cumulative (versus diff), the same data written to tape multiple times (potential tape / disk cost issue.) Given that you are using disk, I'd say differentials is probably the way to go all around.

-Jonathan

From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Cruice, Daniel (US - Glen Mills)
Sent: Tuesday, August 14, 2007 4:23 PM
To: rcarlisle; VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Synthetic fulls Diff Inc VS cumulative Inc

Right now we are running Incrementals to disk and tape the same w/ the fulls.

Thanks

Dan

From: rcarlisle [mailto:rcarlisle AT serverwarecorp DOT com]
Sent: Tuesday, August 14, 2007 4:19 PM
To: Cruice, Daniel (US - Glen Mills); VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Synthetic fulls Diff Inc VS cumulative Inc

What is your goal for Synthetic fulls? Are you running the incrementals to tape or disk? Are you running the fulls to tape or disk?

Reneé Carlisle

ServerWare Corporation

From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Cruice, Daniel (US - Glen Mills)
Sent: Tuesday, August 14, 2007 3:48 PM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Synthetic fulls Diff Inc VS cumulative Inc

When performing a synthetic full, what should I use, a differential Incremental or a cumulative incremental?...and why?

Thanks

Dan Cruice

Deloitte Technology Service

Deloitte & Touche Tohmatsu

Direct: +1 610-479-5179

Fax: +1 610-479-6179

E-mail: dcruice AT deloitte DOT com

www.deloitte.com

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