Re: definiing deduplication (was: Re: deduplicating file systems: VDO with Debian?)
Hi,
hw wrote:
> with CDs/DVDs, writing is not so easy.
Thus it is not as easy to overwrite them by mistake.
The complicated part of optical burning can be put into scripts.
But i agree that modern HDD sizes cannot be easily covered by optical
media.
I wrote:
> > [...] LTO tapes [...]
hw wrote:
> The problem is that for unknown reasons, the development seems
> to have stopped at some point other than maybe for datacenters that
> might have rooms full of tapes and robots to fetch them. Perhaps
> physical limits made tapes with more capacity not really feasible.
Even if there are no technical obstacles, the price/capacity ratio of
HDD storage makes it hard to establish a new generation of tapes or
optical media. It would need an Ilon Musk to invest billions into the
mass production of fancy new drives and media which then need to be
pushed into the market with competitive prices.
> > The backup part of a computer system should be its most solid and
> > artless part. No shortcuts, no fancy novelties, no cumbersome user
> > procedures.
> That's easier said than accomplished ...
Well, i worked my way down from shell scripting via multi-volume backup
planning to creating the backup filesystem and operating my optical drives
with own SCSI driver code.
In hindsight it looks doable.
Have a nice day :)
Thomas
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