Hmmn, mutation in digital storage.  Maybe that's why programs seem
to have a shelf life?


O> So if you have a very busy varchar2(1) column and a 16K db_block_size, a 16K
O> block is written even if only one character in the block has changed? Seems
O> like hotspots, er, hot blocks could do a "multiplicity" thing. You know...
O> like the more you replicate DNA the more chance for mutation?  :-)

O> Been watching too many movies...



R> The WAFL does indeed write to the nearest available inode and relinks
R> the inode map.  The unlinked inode is immediately available for
R> rewrite unless it is a member of a snapshot.  Thus while reserving
R> unlinked blocks is inefficient from a storage perspective, it is a
R> factor you get to control by controlling the snapshots.


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