[Pc_Support] Re: Backup methodology -- centralize for lower TCO

[William A. Mahaffey III]

Bryan J. Smith wrote:

>On Mon, 2006-06-26 at 21:35 -0500, William A. Mahaffey III wrote:
>  
>
>>Is there any *free* way to do that delta/incremental near-line backup ? 
>>I am doing full near-lines, every night, A/B-style (so I have 2 full 
>>copies, the older of which is overwritten with each new copy).
>>    
>>
>
>Huh?
>
>First off, you're not using rsync?
>  
>

correct, not installed under SuSE 9.2 by default (not for me anyway). 
What package is it in ?

>Secondly, there are various "snapshot" options -- not only at the volume
>manager level, but also using hard links.
>
>And there are many other options too.
>
>  
>
>>How much time penalty is there in doing deltas vs. full ?
>>    
>>
>
>A hell of a lot!  If you're only changing 5% of your files/capacity,
>then you're copying 20x more than you need to!
>  
>

yeah, but you are doing diffs/whatever across the network, that has 
gotta eat up some time ....


-- 
	William A. Mahaffey III

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	"The M1 Garand is without doubt the finest implement of war
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