On 11/29/2015 01:19 PM, Sam Varshavchik wrote:
I really don't understand why Fedora is still foisting all the
overhead of LVM on everyone, by default.
I would imagine that the simple answer is "consistency."
The slightly longer answer, IMO:
Would you like to make snapshots for consistent backups? That's enabled
by LVM. Would you like to accelerate magnetic disks using SSD-backed
cache? That's enabled by LVM. Would you like storage for virtual
machines with low overhead? That's enabled by LVM.
Personally, I think all of those are relevant to desktop systems. I
make use of those features on my home desktop. And while not everyone
does, there's really no reason to exclude the component that would allow
them to do so when they decide that they would like to.
Those are benefits to users. Developers (Anaconda and dracut, maybe
others) benefit from having a consistent configuration that's supported
from laptops up to servers. The more consistent those systems are, the
better tested the storage stack is, and the more stable it will be for
everyone.
But I wonder how often does that happen, versus how often LVM's
overhead ends up getting competely wasted.
Unless you have a snapshot of a volume, LVM doesn't have a measurable
overhead.
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