On Fri, Apr 24, 2009 at 12:35 AM, Stan Schymanski <schym...@gmail.com> wrote: > > +1 for a 'smart' auto backup system. I don't know whether it was the > snapshot saving or what did it, but I never bothered saving notebooks > while working with them and never lost any data after crashes.
When a snapshot is taken the state of the worksheet is also saved. This will still happen fairly frequently. > It is > such a great peace of mind not to have to remember to save your work > regularly and still not to risk any data loss. This was an experience I > have never had with any other software before. +1 -- I also hate software that causes one to lose work, which is partly why Sage tries so hard not to. > For some reason, I was thinking that the auto save in sage works > incrementally, like for example in svn. The problem of identical > snapshots suggests otherwise. Am I confusing something here? It *should* work incrementally, and could be implemented that way. However that would be more work, and nobody has done that work yet. > > Cheers, > Stan > > Rob Beezer wrote: >> On Apr 22, 5:36 pm, William Stein <wst...@gmail.com> wrote: >> >>> Does anybody here ever use snapshots? >>> >> >> I have never used a snapshot, that I am aware of. I've lost a cell or >> two due to crashes, but I think this was always due to my flaky USB >> hard drive setup and not Sage's fault. And it was always just messing >> around while writing lecture notes, or something similarly not too >> important. >> >> I like the way the proposed patch wipes the slate fairly clean. But I >> sort of hope it is temporary and at some point a rational autosave >> strategy of some sort is implemented. There was an attempt to not >> create a snapshot if there were no changes, but I don't think that >> worked as advertised. And the auto-save interval was more like "save >> if there is a trigger and it has been *longer* than the interval" >> >> It would be nice if >> >> (a) autosave, or not, was user-configurable from the notebook settings >> by user >> >> (b) autosave interval could be set to *any* integer number of seconds/ >> minutes (maybe 0 means don't) in notebook settings >> >> (c) There really weren't ever identical snapshots created >> >> (d) William's idea of phased snapshots (fewer as they age) was >> implemented since it is a good idea. >> >> Is it problematic to spawn a thread that just sleeps for an interval >> and then wakes up to consider making a snapshot? >> >> Anyway, this isn't meant to be a proposal, just the suggestion that if >> properly designed, then a useful, unobtrusive backup system should be >> possible. >> >> I hope to review William's patch soon, but will let this thread run >> its course first. >> >> Rob >> >> >> >> >> > >> > > -- > > > > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
