#5880: [with patch; needs review] notebook -- greatly reduce the number of
actions
that trigger taking a snapshot
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Reporter: was | Owner: boothby
Type: defect | Status: new
Priority: major | Milestone: sage-3.4.2
Component: notebook | Keywords:
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Comment(by tornaria):
I promised to try this patch, but I haven't yet installed into my
production server. As it turns out, there is a big improvement in 3.4.1
wrt snapshots, which makes this issue less pressing wrt disk usage... I
still think the semantics of snapshots are broken, and particularly they
make "discard and quit" unusable, and "undo" a bit hard.
To clean up the snapshot directories in my production server, without
removing old revisions in case somebody actually cares about them, I wrote
a script to clean up repeated snapshots. The script is only good until you
install 3.4.1, and its behaviour is to remove any snapshot which is
identical to an earlier one. In effect, this retroactively imposes the new
behaviour for snapshots...
To get an idea of the magnitude of the problem. Our notebook server has
been in production for a little bit over a month. It has about 20 active
users (most students on my sage course, so they actually use the
notebook). Running the script deleted 479269 snapshots, keeping only
5908... In fact, I ran the script again after a few hours, and it deleted
another 15k new snapshots or so... I've switched the notebook to 3.4.1,
and it's not producing redundant snapshots anymore.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5880#comment:1>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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