[PVE-User] qcow2 vs raw format

Roland @web.de devzero at web.de
Mon Mar 9 14:21:16 CET 2020


 >Performance-wise, they should be almost the same. qcow2 is a bit more
complex than a raw file/partition, but I don't think you'll notice any
impact.

i did test that a while ago and got very different results, qcow2 was
much slower on my system. cannot provide details, though (did not save that)

i recommend reading
https://serverfault.com/questions/407842/incredibly-low-kvm-disk-performance-qcow2-disk-files-virtio
and compare yourself....

roland

Am 09.03.20 um 13:35 schrieb Eneko Lacunza:
> Hola Leandro,
>
> El 9/3/20 a las 13:21, Leandro Roggerone escribió:
>> Thankyou Eneko ,
>> Are features / performance difference between those formats ?
>
> Take a look at:
> https://pve.proxmox.com/wiki/Storage
>
> Performance-wise, they should be almost the same. qcow2 is a bit more
> complex than a raw file/partition, but I don't think you'll notice any
> impact. Maybe others can comment on this.
>
> Saludos
> Eneko
>
>> Regards,
>> Leandro.
>>
>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
>>
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>> El lun., 9 mar. 2020 a las 9:17, Eneko Lacunza (<elacunza at binovo.es>)
>> escribió:
>>
>>> Hola Leandro,
>>>
>>> El 9/3/20 a las 13:11, Leandro Roggerone escribió:
>>>> Hi guys, after install pve , would like to create my first VM.
>>>> I noticed that only available format is raw.
>>>> Question is:
>>>> Is qcow2 deprecated ?
>>>> What are differences between them ? (I already google it but is not
>>>> 100%
>>>> clear).
>>>>
>>>> This is my storage configuration is.
>>>> root at pve:~# cat /etc/pve/storage.cfg
>>>> dir: local
>>>>           path /var/lib/vz
>>>>           content iso,vztmpl,backup
>>>>
>>>> lvmthin: local-lvm
>>>>           thinpool data
>>>>           vgname pve
>>>>           content rootdir,images
>>>>
>>> You need a file-type storage (i.e. dir type) to be able to use qcow2
>>> format. Default local-lvm is lvmthin and only logical volumes in raw
>>> format can be created (no raw files are created in fact).
>>>
>>> Cheers
>>> Eneko
>>>
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>>> Binovo IT Human Project, S.L.
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