I've been looking into possibilities of solving the problem that we
delete the cache in case of crash. I'd rather discuss the topic here
than bloating bug #105843 even more...
As far as I can see, the best solution with the current code would be to
add a journal file that would keep a track of all dirty blocks, separate
files and cache map entries that need to be deleted if a crash occurs.
From time to time we would sync block files and map file to disk and
the journal file would be cleaned up at this point. The problem is that
we would need to sync the journal file after every change and regarding
the comment #3 in bug #681085 I'm not sure that this is acceptable.
Any thoughts on this?
Michal
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