[Users] OpenVZ and ZFS excellent experience

[Pavel Odintsov]

Thank you, Kirill! I am grateful for your answer!

I reproduced this issue specially for you on one container with 2.4
times (240% vs 20%) overuse.

I do my tests with current vzctl and ploop 1.12.2 (with fixed
http://bugzilla.openvz.org/show_bug.cgi?id=3156).

Please check this gist:
https://gist.github.com/pavel-odintsov/b2162c0f7588bb8e5c15

I can't describe this behavior without complying on ext4 data.... But
I I will be very happy if you fix it :)

On Sat, Jan 10, 2015 at 12:29 AM, Kirill Korotaev <dev at parallels.com> wrote:
>
>> On 09 Jan 2015, at 21:39, Pavel Odintsov <pavel.odintsov at gmail.com> wrote:
>>
>> Hello, everybody!
>>
>> Do somebody have any news about ZFS and OpenVZ experience?
>>
>> Why not?
>>
>> Did you checked my comparison table for simfs vs ploop vs ZFS volumes?
>> You should do it ASAP:
>> https://github.com/pavel-odintsov/OpenVZ_ZFS/blob/master/openvz_storage_backends.md
>>
>> Still not interesting?
>>
>> For example if you have 5Tb disk array (used up to 90%) and using
>> ploop now you lose about 800GB of disk space!
>
> Well, AFAIR we simply have a threshold that ploop is not compacted until it’s size is 20% bigger then it should be…
> Also you can try smaller ploop block size. Anyway, my point is that it has nothing to do with ext4 metadata as stated in your table.
>
>
>> This data is from real HWN with few hundreds of containers.
>>
>> I have excellent experience and very good news about ZFS! ZFS on Linux
>> team will add very important feature, linux quota inside container
>> (more details here https://github.com/zfsonlinux/zfs/pull/2577
>>
>> But still no news about ZFS from OpenVZ team (and even from Virtuozza
>> Core) and we can work separately :)
>>
>> Fortunately, we do not need any support from vzctl and can use "raw
>> vzctl" with some lightweight manuals from my repo:
>> https://github.com/pavel-odintsov/OpenVZ_ZFS/blob/master/OpenVZ_containers_on_zfs_filesystem.md
>>
>> I collected all useful information here
>> https://github.com/pavel-odintsov/OpenVZ_ZFS
>>
>> Stay tuned! Join to us!
>>
>> --
>> Sincerely yours, Pavel Odintsov
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>
>
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-- 
Sincerely yours, Pavel Odintsov