Re: filesystem full - misconfiguration?

David Keegel wrote:
> On Sun, Aug 20, 2006 at 05:04:00PM -0400, brian wrote:
> 
>>I've had rsnapshot running for a little while now and it seems to have 
>>filled up my fileystem.
> 
>  
> 
>>[root@apollo snapshots]# rsnapshot du
>>5.5G    /snapshots/hourly.0/
>>138M    /snapshots/hourly.1/
>>120M    /snapshots/hourly.2/
>>222M    /snapshots/hourly.3/
>>226M    /snapshots/hourly.4/
>>90M     /snapshots/hourly.5/
>>289M    /snapshots/daily.0/
>>321M    /snapshots/daily.1/
>>194M    /snapshots/daily.2/
>>195M    /snapshots/daily.3/
>>259M    /snapshots/daily.4/
>>157M    /snapshots/daily.5/
>>411M    /snapshots/daily.6/
>>1.6G    /snapshots/weekly.0/
>>465M    /snapshots/weekly.1/
>>13G     total
> 
> 
> If there is an odd one out there, it is weekly.0.  That suggests 1600M of
> changed files between daily.6 and weekly.0, but only 400M between weekly.0
> and weekly.1.

Precisely. That doesn't make any sense to me at all.

> 
> 
>>As i understand it, using du through rsnapshot should give a proper 
>>reading of what's going (given the hard links). But this doesn't look 
>>right at all. I've certainly not been generating hundreds of Mb of 
>>changes to the system every day.
> 
> 
> It's the total size of changed files that counts, not just total of the
> amounts changed within each file.  (In case that wasn't obvious from
> Jim Gottlieb's message.)
> 

Right. I should have been clearer.

> If you don't have enough disk space free for 13G of snapshots, I'd
> suggest reducing the number of snapshots you keep.  You might want 
> to stop keeping the weekly and monthly snapshots.  Or stop doing
> hourly snapshots and just do 7 daily and 4 weekly instead. 
> 
> 

Actually, it's only the filesystem that's topped up. The disk has plenty 
more space. I'd figured that it would be large enough, based on my rough 
(and incorrect, it seems) calculations.

> 
> I don't see any obvious problems with your config (although I'm slightly
> surprised you do the weekly rotation mid-week rather than on a weekend).
> 

I'm sure i had a reason for doing that at the time :-)

> 
>>So, can anyone point me in the correct direction on this? And, to free 
>>up disk space, can i safely just remove all of the snapshots, save for 
>>daily.0?
> 
> 
> If you are doing "hourly" snapshots, you would need to keep hourly.0.
> 
> If you want to ditch the hourly snapshots you probably want to move
> hourly.0 to daily.0, remove the other hourly.X directories, and remove
> hourly from rsnapshot.conf and crontab. 
> 

Thanks. Again, i should have been more clear. I meant, if there was a 
configuration problem, in order to start from scratch, would it be fine 
to remove all except daily.0 (everything's archived elsewhere). I guess 
that's the case.

> Just removing snapshots won't solve your problem in the long term - 
> once those snapshots are filled out again, you would probably be back
> in the same boat, unless you reduce the number of snapshots or reduce
> the total amount of changed files you backup.  Or get more disk space.
> 

Oh, i realise removing them will only buy me so much time without 
changes elsewhere. I think i will take your advice, though, and reduce 
the number of snapshots i run.

Thanks for your time.

brian

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