Questions about dump/restore to/from DVD media
Ronald F. Guilmette
rfg at tristatelogic.com
Mon Nov 5 11:49:50 UTC 2012
In message <20121105051447.6eef32ef.freebsd at edvax.de>,
Polytropon <freebsd at edvax.de> wrote:
>> >The problem is that delegating compression to a "sub-task" would
>> >imply that dump cannot precisely adjust its output to match the
>> >media size (as the limit is now defined by how good the compression
>> >works).
>>
>> Correct. We have both just said the exact same thing in different ways.
>>
>> In order to have _compression_ of the dump data _and_ still be able to
>> divide the (post-compression) data into nice proper 2KB chunks (as required
>> for DVD+/-R writing) the compression step itself would need to be integrated
>> into the dump program itself (and then, for symmetry, if for no other
>> reason, into restore as well).
>
>Chunk size _and_ media size matter (as dump would have to "know"
>when the media is expected to be "nearly-full" _with_ compression)
Correct.
We are both still just violently agreeing.
Regards,
rfg
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