FreeBSD UFS2 snapshots, and math ... - resolved, but two more Qs

user user at dhp.com
Fri Oct 21 07:24:32 PDT 2005



On 21 Oct 2005, Lowell Gilbert wrote:

> The snapshot doesn't know what the bits in the file are.  All it knows
> is that the file's data used to be, say in "block 1857" and now the
> file's data are in "block 1956".  The fact that both blocks are
> identical is not detected.
> 
> If you're really interested in this, I suggest reading a decent
> operating systems book.  It's a lot easier to understand the specific
> implementation when you have a good grip on the standard terminology
> and principles.


Thanks very much for your help.  I am going to read a book or two - my
plan was to start with "the design adn implementation of the 4.4BSD OS",
but I wanted to update it with more modern information - like snapshots,
etc., which I will do with those URLs we have already posted RE: the
snapshot work.

If you have any others, let me know.



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