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local time machine snapshots
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Peter
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Jul 22, 2011, 08:25 PM
 
any idea how to enable this under lion?
we don't have time to stop for gas
     
Art Vandelay
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Jul 22, 2011, 08:31 PM
 
It's on by default.
Vandelay Industries
     
CharlesS
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Jul 22, 2011, 10:09 PM
 
Indeed, I can't find a way to turn it off. Not without disabling Time Machine altogether, at least.

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ChrisF
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Jul 23, 2011, 12:32 AM
 
tmutil is how you access the options for Time Machine.
Code:
sudo tmutil disablelocal
will shut the local backups off, but they're only enabled on portable computers.

There's a reasonably detailed man page for tmutil.
     
besson3c
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Jul 23, 2011, 12:40 AM
 
Somehow a big ass directory of hard links on the local boot drive on a flimsy file system seems like a bad idea to me.
     
turtle777
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Jul 23, 2011, 12:42 AM
 
Originally Posted by besson3c View Post
Somehow a big ass directory of hard links on the local boot drive on a flimsy file system seems like a bad idea to me.
Works ok for external TimeMachine volumes, doesn't it ?

-t
     
CharlesS
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Jul 23, 2011, 12:44 AM
 
Originally Posted by ChrisF View Post
tmutil is how you access the options for Time Machine.
Code:
sudo tmutil disablelocal
will shut the local backups off, but they're only enabled on portable computers.

There's a reasonably detailed man page for tmutil.
Thanks, hadn't noticed that yet.

Really strange that they removed that option from the pref pane. I could swear it was there in the developer previews.

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CharlesS
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Jul 23, 2011, 12:46 AM
 
Originally Posted by turtle777 View Post
Works ok for external TimeMachine volumes, doesn't it ?
Not if anything goes wrong with the drive. One the directories get larger than 4 GiB, you can't run DiskWarrior on it anymore, since DW loads all the directory structures into RAM, and it's a 32-bit app which causes it to choke at 4 GiB. And with all the hard links it makes Time Machine, in my experience, tends to go past this point very quickly. Running Disk Utility on the drive works, but it takes hours (literally) to complete and as such is not very practical. I'd rather avoid having those same issues on my boot drive...

This kind of feature would work great on ZFS, though. Hopefully it won't be too long until we get a new filesystem — Apple certainly seems to have been designing features with a ZFS-like filesystem in mind for the past few years.

Fortunately, HFS+ has been a lot better about this lately than it used to be. I haven't had Disk Utility turn up any problems with my Time Machine drive for years. It's annoying, though, that if any problems did come up, it would be time-consuming to fix them.

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turtle777
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Jul 23, 2011, 01:24 AM
 
Originally Posted by CharlesS View Post
I haven't had Disk Utility turn up any problems with my Time Machine drive for years. It's annoying, though, that if any problems did come up, it would be time-consuming to fix them.
That was sort of my point. It seems to work reliably. I have never had any error on my TM volume.

-t
     
ChrisF
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Jul 23, 2011, 09:54 AM
 
Originally Posted by CharlesS View Post
Thanks, hadn't noticed that yet.

Really strange that they removed that option from the pref pane. I could swear it was there in the developer previews.
It was there in the earlier previews, removed for later ones.
     
Cold Warrior
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Jul 23, 2011, 10:03 AM
 
Thanks for the tip to disable it. I've got a decent amount of space on my SSD but the last thing I need is a still-no-TRIM OS X backing up whatever it feels like to a space-limited SSD with little to no control.
     
besson3c
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Jul 23, 2011, 12:45 PM
 
Originally Posted by turtle777 View Post
Works ok for external TimeMachine volumes, doesn't it ?

-t

Yes, but those drives don't house the OS. It would suck if my drive became unbootable because of TM's local backup.
     
   
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