[linux-lvm] thin handling of available space

Zdenek Kabelac zkabelac at redhat.com
Tue May 3 15:45:11 UTC 2016

On 3.5.2016 15:15, Gionatan Danti wrote:
> On 03/05/2016 13:42, Zdenek Kabelac wrote:
>> What's wrong with  'lvs'?
>> This will give you the available space in thin-pool.
> Oh, absolutely nothing wrong with lvs. I used "lsblk" only as an example of
> the block device/layer exposing some (lack of) features to upper layer.
> One note about the continued "suggestion" to use BTRFS. While for relatively

It's not  'continued' suggestion.

It's just the example of solution where   'filesystem & block layer' are tied 
together.  Every solution has some advantages and disadvantages.

> simple use case it can be ok, for more demanding (rewrite-heavy) scenarios
> (eg: hypervisor, database, ecc) it performs *really* bad, even when "nocow" is
> enabled.

So far I'm convinced layered design gives user more freedom - for the price
of bigger space usage.

> Anyway, ThinLVM + XFS is an extremely good combo in my opinion.

Yes, thought ext4 is quite good as well...


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