Mailing List Archive

FAS8020 HA pair in 1 chassis -- cluster interconnect ?
Hello,
I've currently got a FAS3240 HA pair (with each controller in its own chassis). I am swapping the heads with a FAS8020 HA pair. This is 7-mode 8.2.x.

With the current 3240's..there are a cluster interconnects that runs between c0a and c0b on both controllers.

The new 8020 is a HA pair in one chassis. Are cluster interconnects required ?

The Installation and Setup Instructions guide shows it differently for cDOT and 7-mode..

For cDOT is says to connect e0a to e0a and e0b to e0b for the cluster interconnect.
This is listed as a "switchless cluster" for cDOT. (no mention of 7-mode here)

For 7-mode and cDot for a "switched HA configuration", it has e0a and e0b for both heads going the upstream switches.

The guide I'm talking about is at:

library.netapp.com/ecm/ecm_download_file/ECMP1199906

Install Hardware (blue 2) step 2.2

I am not planning on using e0a or e0b for networking at all. The purchase did not come with any cables that will work between these ports.

Thanks.
Paul
Re: FAS8020 HA pair in 1 chassis -- cluster interconnect ? [ In reply to ]
Cdot requires an ha interconnect (the backplane of the 8020) and a cluster interconnect (10gb ethernet cables that you run from node to node). 7-mode just needs the ha interconnect.
Sent from my BlackBerry 10 smartphone on the Bell network. From: Paul LettaSent: Monday, October 5, 2015 4:45 PMTo: toastersSubject: FAS8020 HA pair in 1 chassis -- cluster interconnect ?
Hello,I've currently got a FAS3240 HA pair (with each controller in its own chassis). I am swapping the heads with a FAS8020 HA pair. This is 7-mode 8.2.x.

With the current 3240's..there are a cluster interconnects that runs between c0a and c0b on both controllers.
The new 8020 is a HA pair in one chassis. Are cluster interconnects required ?
The Installation and Setup Instructions guide shows it differently for cDOT and 7-mode..
For cDOT is says to connect e0a to e0a and e0b to e0b for the cluster interconnect.This is listed as a "switchless cluster" for cDOT. (no mention of 7-mode here)

For 7-mode and cDot for a "switched HA configuration", it has e0a and e0b for both heads going the upstream switches.
The guide I'm talking about is at:
library.netapp.com/ecm/ecm_download_file/ECMP1199906
Install Hardware (blue 2) step 2.2
I am not planning on using e0a or e0b for networking at all. The purchase did not come with any cables that will work between these ports.
Thanks.
Paul
Re: FAS8020 HA pair in 1 chassis -- cluster interconnect ? [ In reply to ]
Francis Kim
fkim@berkcom.com<mailto:fkim@berkcom.com>

On Oct 5, 2015, at 1:40 PM, Paul Letta <letta@jlab.org<mailto:letta@jlab.org>> wrote:

Hello,
I've currently got a FAS3240 HA pair (with each controller in its own chassis). I am swapping the heads with a FAS8020 HA pair. This is 7-mode 8.2.x.

With the current 3240's..there are a cluster interconnects that runs between c0a and c0b on both controllers.
They were called cluster interconnects, but more precise to call them HA Interconnect, now that cDOT is all over the place.


The new 8020 is a HA pair in one chassis. Are cluster interconnects required ?

Nope. The controllers HA interconnect via back/mid plane, the same as how a non-IOXM 3240A would have have HA paired its two controllers in a single chassis configuration.

The Installation and Setup Instructions guide shows it differently for cDOT and 7-mode..

For cDOT is says to connect e0a to e0a and e0b to e0b for the cluster interconnect.
This is listed as a "switchless cluster" for cDOT. (no mention of 7-mode here)

Cluster Interconnect in cDOT has a different meaning from 7-mode’s HA interconnect. In cDOT HA interconnect still exists, but serves a differrent purpose (Heartbeat, NVRAM, VTIC, etc.) from the Cluster Interconnect.


For 7-mode and cDot for a "switched HA configuration", it has e0a and e0b for both heads going the upstream switches.

The guide I'm talking about is at:

library.netapp.com/ecm/ecm_download_file/ECMP1199906<http://library.netapp.com/ecm/ecm_download_file/ECMP1199906>

Install Hardware (blue 2) step 2.2

I am not planning on using e0a or e0b for networking at all. The purchase did not come with any cables that will work between these ports.

You can someday use these for 10GbE connectivity.

Thanks.
Paul


_______________________________________________
Toasters mailing list
Toasters@teaparty.net<mailto:Toasters@teaparty.net>
http://www.teaparty.net/mailman/listinfo/toasters
Re: FAS8020 HA pair in 1 chassis -- cluster interconnect ? [ In reply to ]
Two different setups all together.

with 7-mode & cDOT, the HA interconnect is inside the chassis. No cables
needed.

With cDOT, the switchless cluster refers to the private backend cluster
network (typically a 10gig network)
that runs on the NetApp 1610 switches or Nexus 5Ks

So, in your case, no external cables should be necessary.



--tmac

*Tim McCarthy*
*Principal Consultant*


On Mon, Oct 5, 2015 at 4:40 PM, Paul Letta <letta@jlab.org> wrote:

> Hello,
> I've currently got a FAS3240 HA pair (with each controller in its own
> chassis). I am swapping the heads with a FAS8020 HA pair. This is 7-mode
> 8.2.x.
>
> With the current 3240's..there are a cluster interconnects that runs
> between c0a and c0b on both controllers.
>
> The new 8020 is a HA pair in one chassis. Are cluster interconnects
> required ?
>
> The Installation and Setup Instructions guide shows it differently for
> cDOT and 7-mode..
>
> For cDOT is says to connect e0a to e0a and e0b to e0b for the cluster
> interconnect.
> This is listed as a "switchless cluster" for cDOT. (no mention of 7-mode
> here)
>
> For 7-mode and cDot for a "switched HA configuration", it has e0a and e0b
> for both heads going the upstream switches.
>
> The guide I'm talking about is at:
>
> library.netapp.com/ecm/ecm_download_file/ECMP1199906
>
> Install Hardware (blue 2) step 2.2
>
> I am not planning on using e0a or e0b for networking at all. The purchase
> did not come with any cables that will work between these ports.
>
> Thanks.
> Paul
>
>
>
> _______________________________________________
> Toasters mailing list
> Toasters@teaparty.net
> http://www.teaparty.net/mailman/listinfo/toasters
>
>
Re: FAS8020 HA pair in 1 chassis -- cluster interconnect ? [ In reply to ]
If you transition to cDOT, this could be the last disruptive headswap you’ll have to do.

Francis Kim
fkim@berkcom.com<mailto:fkim@berkcom.com>

On Oct 5, 2015, at 1:40 PM, Paul Letta <letta@jlab.org<mailto:letta@jlab.org>> wrote:

Hello,
I've currently got a FAS3240 HA pair (with each controller in its own chassis). I am swapping the heads with a FAS8020 HA pair. This is 7-mode 8.2.x.

With the current 3240's..there are a cluster interconnects that runs between c0a and c0b on both controllers.

The new 8020 is a HA pair in one chassis. Are cluster interconnects required ?

The Installation and Setup Instructions guide shows it differently for cDOT and 7-mode..

For cDOT is says to connect e0a to e0a and e0b to e0b for the cluster interconnect.
This is listed as a "switchless cluster" for cDOT. (no mention of 7-mode here)

For 7-mode and cDot for a "switched HA configuration", it has e0a and e0b for both heads going the upstream switches.

The guide I'm talking about is at:

library.netapp.com/ecm/ecm_download_file/ECMP1199906<http://library.netapp.com/ecm/ecm_download_file/ECMP1199906>

Install Hardware (blue 2) step 2.2

I am not planning on using e0a or e0b for networking at all. The purchase did not come with any cables that will work between these ports.

Thanks.
Paul


_______________________________________________
Toasters mailing list
Toasters@teaparty.net<mailto:Toasters@teaparty.net>
http://www.teaparty.net/mailman/listinfo/toasters
Re: FAS8020 HA pair in 1 chassis -- cluster interconnect ? [ In reply to ]
Paul -

The documentation that you're seeing for CDOT which refers to a cluster interconnect (switchless cluster) with 10GbE cables from e0a <-> e0a and e0b <-> e0b is actually the cluster management network, which is something altogether different from HA. The cluster management network/interconnect is used for intra-cluster operations such as non-disruptive volume moves.

The HA connection in either case (7-Mode/CDOT) is handled over a backplane connection with the 80x0 series of controllers, this connection keeps the NVRAM of the controllers in sync with one another in the event of a catastrophic event on one controller or another.

The important thing to note here is that when you're talking about a high availability pair of controllers, going forward you'd refer to them as an HA pair. When you're talking about a cluster, going forward that will be taken to mean 2+ systems, whether linked with HA or not, that are participating in a Clustered Data ONTAP cluster. Understandably it is a bit confusing since we've all grown accustomed to the old definition of a cluster under 7-Mode.

Hopefully you'll be able to take this opportunity with your hardware upgrade to transition to CDOT. Once you've gotten past the migration hurdle, it's a really wonderful storage OS and you'll be amazed at some of the things you can do with it and wonder how you got along without them before. There are so many cool features like non-disruptive volume moves, rolling upgrades, single-namespace for NAS, true multi-tenancy -- the list goes on and on and even more enhancements are on the horizon.

Anthony Bar
tbar@berkcom.com<mailto:tbar@berkcom.com>
Berkeley Communications
www.berkcom.com<http://www.berkcom.com/>

On Oct 5, 2015, at 1:41 PM, Paul Letta <letta@jlab.org<mailto:letta@jlab.org>> wrote:

Hello,
I've currently got a FAS3240 HA pair (with each controller in its own chassis). I am swapping the heads with a FAS8020 HA pair. This is 7-mode 8.2.x.

With the current 3240's..there are a cluster interconnects that runs between c0a and c0b on both controllers.

The new 8020 is a HA pair in one chassis. Are cluster interconnects required ?

The Installation and Setup Instructions guide shows it differently for cDOT and 7-mode..

For cDOT is says to connect e0a to e0a and e0b to e0b for the cluster interconnect.
This is listed as a "switchless cluster" for cDOT. (no mention of 7-mode here)

For 7-mode and cDot for a "switched HA configuration", it has e0a and e0b for both heads going the upstream switches.

The guide I'm talking about is at:

library.netapp.com/ecm/ecm_download_file/ECMP1199906<http://library.netapp.com/ecm/ecm_download_file/ECMP1199906>

Install Hardware (blue 2) step 2.2

I am not planning on using e0a or e0b for networking at all. The purchase did not come with any cables that will work between these ports.

Thanks.
Paul


_______________________________________________
Toasters mailing list
Toasters@teaparty.net<mailto:Toasters@teaparty.net>
http://www.teaparty.net/mailman/listinfo/toasters