Re: [pve-devel] ZFS-over-NFS

[Dmitry Petuhov]

26.07.2016 19:08, Andreas Steinel wrote:
>> Why not use qcow2 format over generic NFS? It will give you
>> shapshot-rollback
>> features and I don't think that with much worse speed than these features
>> on ZFS level.
> I want to have send/receive also and I use QCOW2 on top of ZFS to have
> "switch-to-that-snapshot" capability, what ZFS not supports.
What you mean by send/receive?
So you want to combine ZFS and qcow2 exclusive snapshot features at same time?
I don't think that's possible.

>> But on my experience, NFS storage for VMs is bad idea: it causes huge
>> latencies under
>> load, leading to chashes. If you want ZFS-based shared storage, then ZFS
>> over iSCSI
>> is your choice.
> I don't want to use another FS over ZFS which I need to use when using LXC
> (in addition to KVM). Then I need to trim it manually to get back free
> space in ZFS. I have this at the moment and I do not like it.
Not understood that too. You asked about "ZFS filesystems exported by NFS".
NFS IS another FS on top of ZFS.

So you want to use part of host's local ZFS [almost] directly in containers 
like it was in
PVE 1-3 with OpenVZ?

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Re: [pve-devel] ZFS-over-NFS

[Andreas Steinel]

On Mon, Jul 25, 2016 at 9:07 PM, Dmitry Petuhov 
wrote:

> Why not use qcow2 format over generic NFS? It will give you
> shapshot-rollback
> features and I don't think that with much worse speed than these features
> on ZFS level.
>

I want to have send/receive also and I use QCOW2 on top of ZFS to have
"switch-to-that-snapshot" capability, what ZFS not supports.


> But on my experience, NFS storage for VMs is bad idea: it causes huge
> latencies under
> load, leading to chashes. If you want ZFS-based shared storage, then ZFS
> over iSCSI
> is your choice.
>

I don't want to use another FS over ZFS which I need to use when using LXC
(in addition to KVM). Then I need to trim it manually to get back free
space in ZFS. I have this at the moment and I do not like it.
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Re: [pve-devel] ZFS-over-NFS

[Dmitry Petuhov]

Why not use qcow2 format over generic NFS? It will give you shapshot-rollback
features and I don't think that with much worse speed than these features on 
ZFS level.

But on my experience, NFS storage for VMs is bad idea: it causes huge latencies 
under
load, leading to chashes. If you want ZFS-based shared storage, then ZFS over 
iSCSI
is your choice.

25.07.2016 21:42, Andreas Steinel wrote:
> Don't get me wrong. Of course NFS works fine, but it is a "stupid" file
> storage. It would be great to have snapshot/rollback features from the
> Proxmox PE gui. The ZFS commands should be executed transparently on the
> storage, so that you can have a "virtual" ZFS that can be used in a cluster.
>
> I really miss a cluster filesystem with snapshot capability (the one from
> Proxmox VE) which can be used by "ordinary" users.

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Re: [pve-devel] ZFS-over-NFS

[Andreas Steinel]

Don't get me wrong. Of course NFS works fine, but it is a "stupid" file
storage. It would be great to have snapshot/rollback features from the
Proxmox PE gui. The ZFS commands should be executed transparently on the
storage, so that you can have a "virtual" ZFS that can be used in a cluster.

I really miss a cluster filesystem with snapshot capability (the one from
Proxmox VE) which can be used by "ordinary" users.

On Mon, Jul 25, 2016 at 6:02 PM, Michael Rasmussen  wrote:

> On Mon, 25 Jul 2016 17:52:58 +0200
> Andreas Steinel  wrote:
>
> > Hi there,
> >
> > are there any plans to support ZFS filesystems exported by NFS to be
> > managed by Proxmox? I'd be very great to have ZFS-backed storage similar
> to
> > ZFS-over-iSCSI but with file storage instead of block storage.
> >
> > Is this even a wanted feature?
> >
> What is wrong with the current NFS implementation?
> I have no problems exporting a ZFS filesystem from my ZFS storage box.
>
> --
> Hilsen/Regards
> Michael Rasmussen
>
> Get my public GnuPG keys:
> michael  rasmussen  cc
> http://pgp.mit.edu:11371/pks/lookup?op=get=0xD3C9A00E
> mir  datanom  net
> http://pgp.mit.edu:11371/pks/lookup?op=get=0xE501F51C
> mir  miras  org
> http://pgp.mit.edu:11371/pks/lookup?op=get=0xE3E80917
> --
> /usr/games/fortune -es says:
> I never loved another person the way I loved myself.
> -- Mae West
>
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Re: [pve-devel] ZFS-over-NFS

[Michael Rasmussen]

On Mon, 25 Jul 2016 17:52:58 +0200
Andreas Steinel  wrote:

> Hi there,
> 
> are there any plans to support ZFS filesystems exported by NFS to be
> managed by Proxmox? I'd be very great to have ZFS-backed storage similar to
> ZFS-over-iSCSI but with file storage instead of block storage.
> 
> Is this even a wanted feature?
> 
What is wrong with the current NFS implementation?
I have no problems exporting a ZFS filesystem from my ZFS storage box.

-- 
Hilsen/Regards
Michael Rasmussen

Get my public GnuPG keys:
michael  rasmussen  cc
http://pgp.mit.edu:11371/pks/lookup?op=get=0xD3C9A00E
mir  datanom  net
http://pgp.mit.edu:11371/pks/lookup?op=get=0xE501F51C
mir  miras  org
http://pgp.mit.edu:11371/pks/lookup?op=get=0xE3E80917
--
/usr/games/fortune -es says:
I never loved another person the way I loved myself.
-- Mae West


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Re: [pve-devel] ZFS-over-NFS

[Robert Marder]

Hi,

How is this different from a normal NFS share that Proxmox already 
supports using? [1]


ZFS processing would happen on your shared storage NAS server where you 
are exporting the NFS share from. All Proxmox sees is an NFS share 
located on another machine, and remains ignorant to the specific 
filesystem underneath it.


[1] https://pve.proxmox.com/wiki/Storage_Model#NFS_Share

On 2016-07-25 10:52 AM, Andreas Steinel wrote:

Hi there,

are there any plans to support ZFS filesystems exported by NFS to be
managed by Proxmox? I'd be very great to have ZFS-backed storage 
similar to

ZFS-over-iSCSI but with file storage instead of block storage.

Is this even a wanted feature?

Best,
Andreas
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[pve-devel] ZFS-over-NFS

[Andreas Steinel]

Hi there,

are there any plans to support ZFS filesystems exported by NFS to be
managed by Proxmox? I'd be very great to have ZFS-backed storage similar to
ZFS-over-iSCSI but with file storage instead of block storage.

Is this even a wanted feature?

Best,
Andreas
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