On Thu, Jan 27, 2011 at 10:48 AM, Graham Keeling <graham AT equiinet DOT com>
wrote:
> On Thu, Jan 27, 2011 at 09:45:29AM -0500, Phil Stracchino wrote:
>> On 01/27/11 09:28, Graham Keeling wrote:
>> > I shall summarise what I thought I had already said, because it is quite
>> > clear
>> > to me.
>> >
>> > You have a terabyte disk that you want to use for backups.
>> >
>> > You split it into 100 Volumes, set 10GB max volume size each, and 1 job
>> > per volume.
>> >
>> > All your backup jobs are 5KB.
>> > You can then only use 500KB of disk space before you run out of volumes.
>>
>> Assuming that you've also set max volumes = 100.
>>
>> However, I believe in this case the problem is summarized by PEBCAK. If
>> all of your backup jobs are 5KB, this would be a completely
>> brain-damaged way to set up your storage.
>
> Please don't be deliberately obtuse.
> The point of the example is to use an extreme to easily demonstrate real
> problems.
> I used the specific figure of 5KB to provide continuity with your own example
> in which you used the same figure.
>
>
> The same problems exist in more realistic situations.
>
> Assuming that I somehow know that all my backups will range from 100MB to
> 10GB,
> then what should I set?
>
> a) 10000 volumes, 100MB max size?
> b) 100 volumes, 10GB max size?
>
How about
c) 200 volumes of 5GB max size.
I use this for my disk based backups at home. At work I am 99.9% tape.
John
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