I would respectfully disagree.
pNFS does not stripe data across controllers. Data is distributed, not
striped.
Every node is a metadata server and will redirect the client process to the
node directly holding the volume. No striping.
Maybe you are confusing pNFS with FlexGroups which distributes files across
nodes.
A very long time ago in ONTAP GX, there >>was<< an ability to stripe data
across controllers. That feature was removed upon going to ONTAP 8.0
--tmac
*Tim McCarthy, **Principal Consultant*
*Proud Member of the #NetAppATeam <https://twitter.com/NetAppATeam>*
*I Blog at TMACsRack <https://tmacsrack.wordpress.com/>*
On Mon, Aug 16, 2021 at 9:36 AM Michael Bergman via Toasters <
toasters@teaparty.net> wrote:
>
>
>
> ---------- Forwarded message ----------
> From: Michael Bergman <michael.bergman@ericsson.com>
> To: Toasters <toasters@teaparty.net>
> Cc:
> Bcc:
> Date: Mon, 16 Aug 2021 13:34:17 +0000
> Subject: Re: pNFS not working on vserver when several lifs with different
> Vlans available
> On 2021-08-16 15:13, Florian Schmid wrote:
> > Is this really the case? Is the pNFS process really not Vlan aware and
> > sends any IP from that node where volume is located, even when the IP is
> > in a different network than the client IP?
>
> Yes. That's how pNFS is supposed to work. That's the whole point one can
> say, of pNFS. It's striping of the data traffic (not metadata) across
> several nodes, all at once.
>
> In that respect, the setup you say you have, this:
>
> "On the vServer, we have several different Vlans and each Vlans has an
> interface for each node there. Our storage network is completely switched,
> so no routing between Vlans possible."
>
> is totally wrong for pNFS. In such a set up you definitely do not want
> pNFS.
>
> /M
>
>
>
> ---------- Forwarded message ----------
> From: Michael Bergman via Toasters <toasters@teaparty.net>
> To: Toasters <toasters@teaparty.net>
> Cc:
> Bcc:
> Date: Mon, 16 Aug 2021 14:34:25 +0100
> Subject:
> _______________________________________________
> Toasters mailing list
> Toasters@teaparty.net
> https://www.teaparty.net/mailman/listinfo/toasters
pNFS does not stripe data across controllers. Data is distributed, not
striped.
Every node is a metadata server and will redirect the client process to the
node directly holding the volume. No striping.
Maybe you are confusing pNFS with FlexGroups which distributes files across
nodes.
A very long time ago in ONTAP GX, there >>was<< an ability to stripe data
across controllers. That feature was removed upon going to ONTAP 8.0
--tmac
*Tim McCarthy, **Principal Consultant*
*Proud Member of the #NetAppATeam <https://twitter.com/NetAppATeam>*
*I Blog at TMACsRack <https://tmacsrack.wordpress.com/>*
On Mon, Aug 16, 2021 at 9:36 AM Michael Bergman via Toasters <
toasters@teaparty.net> wrote:
>
>
>
> ---------- Forwarded message ----------
> From: Michael Bergman <michael.bergman@ericsson.com>
> To: Toasters <toasters@teaparty.net>
> Cc:
> Bcc:
> Date: Mon, 16 Aug 2021 13:34:17 +0000
> Subject: Re: pNFS not working on vserver when several lifs with different
> Vlans available
> On 2021-08-16 15:13, Florian Schmid wrote:
> > Is this really the case? Is the pNFS process really not Vlan aware and
> > sends any IP from that node where volume is located, even when the IP is
> > in a different network than the client IP?
>
> Yes. That's how pNFS is supposed to work. That's the whole point one can
> say, of pNFS. It's striping of the data traffic (not metadata) across
> several nodes, all at once.
>
> In that respect, the setup you say you have, this:
>
> "On the vServer, we have several different Vlans and each Vlans has an
> interface for each node there. Our storage network is completely switched,
> so no routing between Vlans possible."
>
> is totally wrong for pNFS. In such a set up you definitely do not want
> pNFS.
>
> /M
>
>
>
> ---------- Forwarded message ----------
> From: Michael Bergman via Toasters <toasters@teaparty.net>
> To: Toasters <toasters@teaparty.net>
> Cc:
> Bcc:
> Date: Mon, 16 Aug 2021 14:34:25 +0100
> Subject:
> _______________________________________________
> Toasters mailing list
> Toasters@teaparty.net
> https://www.teaparty.net/mailman/listinfo/toasters