Re: Sierra's Time Machine's backups slower?

From	Lewis <g.kreme@gmail.com.dontsendmecopies>
Newsgroups	comp.sys.mac.system, comp.sys.mac.hardware.storage
Subject	Re: Sierra's Time Machine's backups slower?
Date	2017-04-28 11:16 +0000
Organization	Miskatonic U
Message-ID	<slrnog69a7.lhc.g.kreme@snow.local> (permalink)
References	(2 earlier) <1n53swa.ty5yhv1uib5rwN%dempson@actrix.gen.nz> <agisaak-D9B708.07563926042017@88-209-239-213.giganet.hu> <1n53w4s.a8tohs1unrh8xN%nj_kruse@me.com> <slrnog3fea.jnv.g.kreme@snow.local> <agisaak-389227.05495427042017@88-209-239-213.giganet.hu>

Cross-posted to 2 groups.

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In message <agisaak-389227.05495427042017@88-209-239-213.giganet.hu> Andre G. Isaak <agisaak@gm.invalid> wrote:
> In article <slrnog3fea.jnv.g.kreme@snow.local>,
>  Lewis <g.kreme@gmail.com.dontsendmecopies> wrote:

>> In message <1n53w4s.a8tohs1unrh8xN%nj_kruse@me.com> Niels Jørgen Kruse 
>> <nj_kruse@me.com> wrote:
>> > Andre G. Isaak <agisaak@gm.invalid> wrote:
>> 
>> >> My Time Machine backups alternate between two drives, and both are 
>> >> always connected so I doubt there's ever a day in which both drives 
>> >> aren't backed up to multiple times (and I dare anyone to try and fix 
>> >> that stranded preposition). Since I'm rarely away from the computer for
>> >> even a single day I doubt that's the issue.
>> >> 
>> >> I'm backing up both my internal drive (3TB - less than 1TB used) and an
>> >> external Thunderbolt Drive (4TB, about 3TB used) to 2 external 8TB USB
>> >> drives. Not sure if backing up multiple drives should make a difference.
>> >> 
>> >> As I said, this happens very infrequently, so I'm not terribly concerned
>> >> about it. More just curious...
>> 
>> > Time Machine gets very slow when it has to delete old backups. The
>> > oldest backup is slow to delete, possibly because it is mostly actual
>> > files and not fake hardlinks.
>> 
>> Hard links and "actual" files are the same exact thing.

> Time Machine relies not only on hard linked files, but also on hard 
> links to directories.

So?

> Deleting a time-machine backup is considerably slower than deleting a 
> comparably sized group of files, and I assume the reason for this is 
> that the OS performs consistency checks when deleting multiply-linked 
> folders.

Perhaps. It could be for all sorts of reasons, but hard links is not one
of those reasons.

-- 
The hippo of recollection stirred in the muddy waters of the mind.

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Sierra's Time Machine's backups slower? ANTant@zimage.com (Ant) - 2017-04-25 13:16 -0500
  Re: Sierra's Time Machine's backups slower? nospam <nospam@nospam.invalid> - 2017-04-25 14:17 -0400
    Re: Sierra's Time Machine's backups slower? Snit <usenet@gallopinginsanity.com> - 2017-04-25 13:19 -0700
  Re: Sierra's Time Machine's backups slower? "Andre G. Isaak" <agisaak@gm.invalid> - 2017-04-25 22:20 -0600
    Re: Sierra's Time Machine's backups slower? dempson@actrix.gen.nz (David Empson) - 2017-04-26 19:38 +1200
      Re: Sierra's Time Machine's backups slower? "Andre G. Isaak" <agisaak@gm.invalid> - 2017-04-26 07:56 -0600
        Re: Sierra's Time Machine's backups slower? nj_kruse@me.com (Niels Jørgen Kruse) - 2017-04-26 20:44 +0200
          Re: Sierra's Time Machine's backups slower? "Andre G. Isaak" <agisaak@gm.invalid> - 2017-04-26 13:03 -0600
            Re: Sierra's Time Machine's backups slower? nj_kruse@me.com (Niels Jørgen Kruse) - 2017-04-26 22:13 +0200
          Re: Sierra's Time Machine's backups slower? nospam <nospam@nospam.invalid> - 2017-04-26 16:45 -0400
            Re: Sierra's Time Machine's backups slower? android <here@there.was> - 2017-04-27 06:37 +0200
              Re: Sierra's Time Machine's backups slower? nospam <nospam@nospam.invalid> - 2017-04-27 00:39 -0400
                Re: Sierra's Time Machine's backups slower? android <here@there.was> - 2017-04-27 06:44 +0200
                Re: Sierra's Time Machine's backups slower? Alan Baker <alangbaker@telus.net> - 2017-04-26 21:57 -0700
                Re: Sierra's Time Machine's backups slower? android <here@there.was> - 2017-04-27 07:08 +0200
                Re: Sierra's Time Machine's backups slower? Alan Baker <alangbaker@telus.net> - 2017-04-26 22:10 -0700
                Re: Sierra's Time Machine's backups slower? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-04-27 09:43 +0000
                Re: Sierra's Time Machine's backups slower? nospam <nospam@nospam.invalid> - 2017-04-27 09:28 -0400
                Re: Sierra's Time Machine's backups slower? Alan Baker <alangbaker@telus.net> - 2017-04-27 07:02 -0700
                Re: Sierra's Time Machine's backups slower? Bruce Esquibel <bje@ripco.com> - 2017-04-28 11:13 +0000
                Re: Sierra's Time Machine's backups slower? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-04-28 11:25 +0000
                Re: Sierra's Time Machine's backups slower? nospam <nospam@nospam.invalid> - 2017-04-28 08:09 -0400
                Re: Sierra's Time Machine's backups slower? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-04-28 14:42 -0400
                Re: Sierra's Time Machine's backups slower? dempson@actrix.gen.nz (David Empson) - 2017-04-29 09:01 +1200
                Re: Sierra's Time Machine's backups slower? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-04-28 22:59 -0400
                Re: Sierra's Time Machine's backups slower? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-04-29 20:10 +0000
                Re: Sierra's Time Machine's backups slower? Jolly Roger <jollyroger@pobox.com> - 2017-04-27 16:41 +0000
                Re: Sierra's Time Machine's backups slower? android <here@there.was> - 2017-04-27 20:32 +0200
                Re: Sierra's Time Machine's backups slower? Jolly Roger <jollyroger@pobox.com> - 2017-04-27 23:23 +0000
                Re: Sierra's Time Machine's backups slower? android <here@there.was> - 2017-04-28 05:40 +0200
                Re: Sierra's Time Machine's backups slower? Jolly Roger <jollyroger@pobox.com> - 2017-04-28 16:14 +0000
                Re: Sierra's Time Machine's backups slower? android <here@there.was> - 2017-04-28 18:40 +0200
          Re: Sierra's Time Machine's backups slower? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-04-27 09:42 +0000
            Re: Sierra's Time Machine's backups slower? "Andre G. Isaak" <agisaak@gm.invalid> - 2017-04-27 05:49 -0600
              Re: Sierra's Time Machine's backups slower? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-04-27 14:20 -0400
                Re: Sierra's Time Machine's backups slower? Jolly Roger <jollyroger@pobox.com> - 2017-04-27 18:31 +0000
                Re: Sierra's Time Machine's backups slower? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-04-27 14:56 -0400
                Re: Sierra's Time Machine's backups slower? Jolly Roger <jollyroger@pobox.com> - 2017-04-27 19:32 +0000
                Re: Sierra's Time Machine's backups slower? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-04-27 15:55 -0400
                Re: Sierra's Time Machine's backups slower? Jolly Roger <jollyroger@pobox.com> - 2017-04-27 20:41 +0000
                Re: Sierra's Time Machine's backups slower? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-04-28 11:19 +0000
                Re: Sierra's Time Machine's backups slower? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-04-28 15:01 -0400
                Re: Sierra's Time Machine's backups slower? Jolly Roger <jollyroger@pobox.com> - 2017-04-28 19:06 +0000
                Re: Sierra's Time Machine's backups slower? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-04-29 20:07 +0000
              Re: Sierra's Time Machine's backups slower? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-04-28 11:16 +0000
  Re: Sierra's Time Machine's backups slower? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-04-26 14:00 +0000

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