Hi Adam, On Thu, Mar 24, 2011 at 11:26:53AM +0000, Adam Spiers wrote: You refer to the differential report, so there are ~2.5GiB of diffs per snapshot. Since the per-snapshot report shows each snapshot coming in at ~9.5GiB that means you have the same amount of files but with ~2.5GiB changing content every time. Bear in mind that any time a file changes (even if it's just metadata), a copy of both the old and new version will be stored in their entirety. I can have a look and see what I can make of it if you like. I'd rather not look at customer data without permission. If you want to look yourself, look for files that change metadata (mtime, ownership) all the time, like if they're being checked out of version control or downloaded from somewhere without preserving mtimes. Something like that. Normally you'd use rsnapshot-diff on two of the snapshot directories to see what has changed, but I don't think that'll work with NFS since it probably relies on detecting the hardlinks. Cheers, Andy -- http://bitfolk.com/ -- No-nonsense VPS hosting

On 24 March 2011 11:38, Andy Smith &lt;andy(a)bitfolk.com&gt; wrote: Wow, OK - something's not right for sure, as there shouldn't be anywhere near that much churn on my VPS. By metadata presumably you mean inode updates? So I can search for churn via find -ctime? In that case, could I expect remounting partitions with the noatime or relatime options to drastically reduce the size of incrementals? http://en.wikipedia.org/wiki/Atime_(Unix)#ctime http://lwn.net/Articles/244829/ Ahah. I think I may have located the culprits: huge log files. -rw-r--r-- 1 root root 67797975 Mar 24 11:47 /home/adam/web/adamspiers.org/logs/error.log -rw-r--r-- 1 root root 141526573 Mar 24 11:55 /var/www/redmine/log/mod_rails/error.log -rw-r--r-- 1 www-data www-data 314066833 Mar 24 11:55 /var/www/redmine/log/production.log -rw-r--r-- 1 www-data www-data 895519982 Mar 24 11:49 /var/www/wordpress/wp-content/debug.log -rw-r--r-- 1 root root 899657028 Mar 24 11:56 /home/adam/web/adamspiers.org/logs/access.log If I start rotating these regularly, then I could expect the incrementals to significantly shrink, right? For the benefit of anyone else who wishes to sanity check their churn, I did something like this: backup_dirs="/boot /etc /home /initrd /root /srv /usr/local /var" find $backup_dirs -ctime -2 >& /tmp/find_-ctime_-2.out xargs ls -ld < /tmp/find_-ctime_-2.out | sort -n -k5 If there's a better way then please do share it.