[OpenIndiana-discuss] Time Machine and quota limiting

[Jaco Schoonen]

> I have both the sparsebundle size and the ZFS FS set. So the FS was created
> with a quota of 300GB and the sparsebundle then created in there with
> 300GB.
> 

OK, thanks for the tip. I'll give it a go.

> Unless you're backing up multiple Macs, don't use dedup, the performance
> hit you'll take will be huge after a few months unless you've got an
> obscene amount of RAM, like 64+GB

I don't use dedup for everythings, but for TimeMachine I think it may write more or less the same data quite often so there I have it enabled. 
Performance for time machine doesn't really matter too much. Besides, my NAS (5GB RAM) is only connected with single GBit, so I don't need faster than that. 

> Dedup and compression give you more free space, and that's what time
> machine sees.
> 
> Works great for me. I'm backing up 5 macs.

Cool thanks!

Jaco

>> 
>> To limit TM disk-usage I have found at least 5 different options:
>> 1) Use "zfs quota" to limit the size of the filesystem.
>> 2) Use "zfs refquota" to limit the referenced amount of data in the fs.
>> 3) Use netatalk feature "volsizelimit"
>> 4) give the sparsebundle that TM uses a maximum size (hdiutil -resize 100g)
>> 5) Limit Timemachine at application level   (defaults write
>> /Library/Preferences/com.apple.TimeMachine MaxSize -integer XXXX )
>> 
>> What are you all using and how does it work out for you? What would you
>> recommend?
>> 
>> Best regards,
>> 
>> Jaco