On 14/04/2012 04:48, Stan Hoeppner wrote:
On 4/13/2012 10:31 AM, Ed W wrote:
You mean those "answers" like:
"you need to read 'those' articles again"
Referring to some unknown and hard to find previous emails is not the
same as answering?
No, referring to this:
On 4/12/2012 5:58 AM, Ed W wrote:
The claim by ZFS/BTRFS authors and others is that data silently "bit
rots" on it's own.
Is it not a correct assumption that you read this in articles? If you
read this in books, scrolls, or chiseled tablets, my apologies for
assuming it was articles.
WHAT?!! The original context was that you wanted me to learn some very
specific thing that you accused me of misunderstanding, and then it
turns out that the thing I'm supposed to learn comes from re-reading
every email, every blog post, every video, every slashdot post, every
wiki, every ... that mentions ZFS's reason for including end to end
checksumming?!!
Please stop wasting our time and get specific
You have taken my email which contained a specific question, been asked
of you multiple times now and yet you insist on only answering
irrelevant details with a pointed and personal dig on each answer. The
rudeness is unnecessary, and your evasiveness of answers does not fill
me with confidence that you actually know the answer...
For the benefit of anyone reading this via email archives or whatever, I
think the conclusion we have reached is that: modern systems are now a)
a complex sum of pieces, any of which can cause an error to be injected,
b) the level of error correction which was originally specified as being
sufficient is now starting to be reached in real systems, possibly even
consumer systems. There is no "solution", however, the first step is to
enhance "detection". Various solutions have been proposed, all increase
cost, computation or have some disadvantage - however, one of the more
promising detection mechanisms is an end to end checksum, which will
then have the effect of augmenting ALL the steps in the chain, not just
one specific step. As of today, only a few filesystems offer this, roll
on more adopting it
Regards
Ed W
