How long to complete Photos Face Scan?

Discussion in 'macOS Sierra (10.12)' started by curtisl.k, Sep 24, 2016.

  1. curtisl.k macrumors newbie

    Joined:
    Sep 24, 2016
    #1
    I let the photos App idle for a complete whole day and just finish scanning 9,000 photos, while I have 100,000 photos in my library. Still have 90% of my photo to go. That means I have to wait 10 more days to complete this new face scan.

    Is it really take such long time for face scan?

    Meanwhile, the Time Machine keep "Preparing Backup" forever.....

    Any one has idea on this? Thanks.
     
  2. Puonti macrumors 6502a

    Joined:
    Mar 14, 2011
    #2
    I can't provide you with a time estimate, but something to keep in mind is that it's not just locating faces, it's also trying to figure out if there are trees, mountains, horses, boats, cars, casserole (seriously), etc, in those photos. So yes, that's going to take a lot of time, especially if you have a lot of photos (which you do). I have about 13,000 photos and it took somewhere between 7 and 15 hours to go through those (it was at 7 hours by the time I went to bed, and had completed when I woke up).

    You don't have to keep Photos open to get the job done, though. I never once opened Photos after installing Sierra and I could see photoanalysisd using up a lot of CPU time in Activity Monitor.
     
  3. curtisl.k thread starter macrumors newbie

    Joined:
    Sep 24, 2016
    #3
    I used to my current situation, and stay clam to wait until all 100K photos done.

    Even without opening the Photo Apps, my major concerns is "Time Machine getting stuck", it keep always "Preparing backup" for a whole day. I don't know whether it is related to Photos Facd scan or not
     
  4. tgara macrumors 6502a

    tgara

    Joined:
    Jul 17, 2012
    Location:
    Connecticut, USA
    #4
    My experience was the same as Puonti's. You might want to turn off your Time Machine backups temporarily until the photo scan is complete. That's what I'd do.
     
  5. thekayman macrumors 6502

    Joined:
    Oct 23, 2014
    #5
    It took two full days for my library of 35k photos, during which time processor and fans ran full speed.
     
  6. curtisl.k thread starter macrumors newbie

    Joined:
    Sep 24, 2016
    #6
    Will my photo library size substantially increase a lot after this scan?

    Between, is your Time Machine backup process okay during the scan? Mine is keep "Preparing Backup" for more than 24 hours. Thanks.
     
  7. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

    Joined:
    Aug 5, 2001
    Location:
    Denmark
    #7
    If you have a slow HDD, then it may take forever, especially if you are preparing Time Machine backup at the same time.
     
  8. curtisl.k thread starter macrumors newbie

    Joined:
    Sep 24, 2016
    #8
    Fortunately mine is SSD, but unlucky that I have 100k Photos, sigh.
     
  9. Gav2k macrumors G3

    Gav2k

    Joined:
    Jul 24, 2009
    #9
    Time machine won't backup till the process for face scanning finishes. It's unfortunate and a feature that apple fell short on.

    For existing users it's slow to start but I think this is more for new users adding photos as once the scan is complete additional photos scan without you even noticing.
     
  10. Puonti macrumors 6502a

    Joined:
    Mar 14, 2011
    #10
    On my Mac Time Machine was actually backing up while photoanalysisd was running (the TM dropdown menu was indicating something like 20 of 40 GB done when I happened to take a look). Not sure which one completed first since I was asleep, but both were done by morning.
     
  11. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #11
    There is your problem. You need to quit the Photos app for the scan to occur. I have about 7,000 photos and it took a few hours.
     
  12. curtisl.k thread starter macrumors newbie

    Joined:
    Sep 24, 2016
    #12
    Yeah, I quit the photos app for another couple of hours, it scanned few thousands photos more. Finger crossed.
     
  13. thekayman macrumors 6502

    Joined:
    Oct 23, 2014
    #13
    I didn't pay attention but I would say it did not increase by much if at all.
     
  14. h9826790 macrumors G4

    h9826790

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    Apr 3, 2014
    Location:
    Hong Kong
    #14
    70k photo, 3.46GHz CPU, roughly 2 threads full occupied during scan, it cost >72hours (non stop) to finish the whole process.
     
  15. stooovie macrumors 6502a

    Joined:
    Nov 21, 2010
    #15
    I've updated on launch day and it still hasn't finished the scan on 36k photos (Retina imac 2015, left running nonstop since then).
     
  16. ahostmadsen macrumors 6502a

    Joined:
    Dec 28, 2009
    #16
    That is not correct. My first TM backup after upgrading took a long, but it finished much before the face scan, which took several days.
     
  17. Gav2k macrumors G3

    Gav2k

    Joined:
    Jul 24, 2009
    #17
    Strange my tm backup paused till after the scan
     
  18. curtisl.k thread starter macrumors newbie

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    Sep 24, 2016
    #18
    Seems I have to pray for the HDD not dead during the face scan as no TM backup at that moment. Otherwise, I have to start over again.
     
  19. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #19
    TM should able to backup during scan.
     

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