On 02/26/2018 07:38 PM, Richard Gaskin via use-livecode wrote:
Consider this scenario with stack files, for example:
Mark writes a stack, then I open it, then you open it. You and I are
both making changes, and I save mine a few seconds before you save
yours. In that scenario, what's on disk?
Keep in mind the Dropbox and Box are primarily single-user storage
applications. I can, for instance, give read access to others, and if
I'm feeling wild and crazy I can even give write access, but I have to
go out of my way to do this. Normally I'm the only one who can write or
even read the files in my folder, even though they're synced to multiple
machines under my control.
Corruption is very interesting to me. Lost data is usually explainable
through simple multiuser workflow weaknesses, such as inadequate locking
mechanisms. But corruption in LC means something interrupted the write,
or overwrote portions before the write was completed. And since LC
stacks files are written in a single pass, whatever caused it to corrupt
was very efficient at it, as it had little time to do it in.
I *have* had corrupted LiveCode stacks before, and I can count them on
two fingers of one hand. One of them was actually sitting in my Dropbox
folder, so who knows what happened to it? But my favorite thing about
Dropbox is that it stores earlier versions of your files, so I just
reverted to an earlier copy of that stack and carried on.
--
Mark Wieder
ahsoftw...@gmail.com
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