Re: storage considerations

[Oren Laadan <orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>]

Daniel Lezcano wrote:
> Serge E. Hallyn wrote:
>> Quoting Daniel Lezcano (daniel.lezcano-GANU6spQydw@public.gmane.org):
>>   
>>> Dietmar Maurer wrote:
>>>     
>>>> Hi Daniel,
>>>>
>>>> I think we should have several options for the root storage:
>>>>
>>>> 1.) simply use the host filesystem (like Openvz)
>>>>
>>>> 	- special quota support is needed (simfs?)
>>>>
>>>> 	- quota support depends on ext3 fs, so this only works for
>>>> 	  local attached storage (does not work on NFS)
>>>>
>>>> 	- LVM snapshots are slow, because the snapshot includes all
>>>> container
>>>> 	  on that filesystem.
>>>>       
>> I'm looking forward to the btrfs, tux3, and nilfs snapshotting
>> capabilities.
>>   
> Interesting, especially the nilfs.
> The COW file systems is missing in the linux kernel. Do you think the 
> btrfs has a chance to go to mainline ?

We've been using NILFS (v1) for 2 years already with Zap, and it works
quite well. We had to make slight (trivial) changes to be able to
control it nicely for c/r purposes.

See our DejaView paper at
	http://www.ncl.cs.columbia.edu/publications/sosp2007_dejaview.pdf

Oren.