Re: [Qemu-devel] Re: [ANNOUNCE] Sheepdog: Distributed Storage System for KVM

[Tomasz Chmielewski]

Chris Webb wrote:
> Javier Guerra <address@hidden> writes:
>
> > i'd just want to add my '+1 votes' on both getting rid of JVM
> > dependency and using block devices (usually LVM) instead of ext3/btrfs
>
> If the chunks into which the virtual drives are split are quite small (say
> the 64MB used by Hadoop), LVM may be a less appropriate choice. It doesn't
> support very large numbers of very small logical volumes very well.

Also, on _loaded_ systems, I noticed creating/removing logical volumes 
can take really long (several minutes); where allocating a file of a 
given size would just take a fraction of that.

Sot sure how it would matter here, but probably it would.

--
Tomasz Chmielewski
http://wpkg.org