True. So it's a bit smarter about that then I described. Still the end
result of backing up multi-GB files from virtual machines can really
reduce the amount of history you can keep. My backup drive is 500GB so a
full day of backups was hitting 80GB plus whatever else I touched. A
month of dailys (about 20) would add another 200GB. So my backup set
wasn't going much beyond a month or so when it should have last much longer.
CB
On 7/8/11 5:17 PM, Geoff Shang wrote:
On Fri, 8 Jul 2011, Chris Blouch wrote:
First it will make incremental backups once an hour until it fills up
all available space on the backup volume. At that point it will start
to prune the oldest backups first to make room for new backups. So
the bigger your drive and the smaller the incremental changes the
further back in time you can go to restore stuff.
This isn't quite correct. Time Machine only keeps 24 hours worth of
hourly backups. It keeps daily backups for the past month, and weekly
backupsfor as long as there's space to keep them.
http://support.apple.com/kb/ht1427
Geoff.
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