[Dirvish] expiry rules

Dave Howorth dhoworth at mrc-lmb.cam.ac.uk
Wed Mar 16 17:05:56 UTC 2011


Jon Radel wrote:
> I was nodding my head in agreement to your message until the very end of 
> this.  This has come up before on the mailing list.  If I understand the 
> OP correctly, his primary desire is that dirvish apply a higher level 
> understanding of the "value" of a given backup and expire based on this, 
> rather than "mindless" application of the expiry date assigned at backup 
> time.
> 
> The classic example I remember from some years ago was the person who 
> was terribly bent out of shape that after his disk failed dirvish 
> continued to delete images until he was left with a single image.  It 
> had been successful, but it was very far from being the latest image at 
> the time of failure.

I definitely agree that it is sensible to keep the latest image, but I
think that's what dirvish is supposed to do.

There's a comment in dirvish-expire that says:

## WARNING:  don't mess with the sort order, it is needed so that if
## WARNING:  all images are expired the newest will be retained.

Are we saying that the code doesn't match the comment?

Cheers, Dave


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