All nodes in a GPFS cluster need to be able to communicate over the data
and admin network with the exception of remote clusters which can have
their own separate admin network (for their own cluster that they are a
member of) but still require communications over the daemon network.
The networks can be routed and on different subnets, however the each
member of the cluster will need to be able to communicate with every
other member.
With this in mind:
1) The quorum node will need to be accessible on both the 10.1.1.0/24
and 192.168.1.0/24 however again the network that the quorum node is on
could be routed.
2) Remote clusters don't need access to the home clusters admin network,
as they will use their own clusters admin network.
As Eric has mentioned I would double check your 2+1 cluster suggestion,
do you mean 2 x Servers with NSD's (with a quorum role) and 1 quorum
node without NSD's? which gives you 3 quorum, or are you only going to
have 1 quorum?
If the latter that I would suggest using all 3 servers for quorum as
they should be licensed as GPFS servers anyway due to their roles.
-- Lauz
On 10/04/2017 17:58, J. Eric Wonderley wrote:
1) You want more that one quorum node on your server cluster. The
non-quorum node does need a daemon network interface exposed to the
client cluster as does the quorum nodes.
2) No. Admin network is for intra cluster communications...not inter
cluster(between clusters). Daemon interface(port 1191) is used for
communications between clusters. I think there is little benefit
gained by having designated an admin network...maybe someone can point
out benefits of an admin network.
Eric Wonderley
On Mon, Apr 10, 2017 at 12:47 PM, Hans-Joachim Ehlers
<[email protected] <mailto:[email protected]>> wrote:
My understanding of the GPFS networks is not quite clear.
For an GPFS setup i would like to use 2 Networks
1 Daemon (data) network using port 1191 using for example.
10.1.1.0/24 <http://10.1.1.0/24>
2 Admin Network using for example: 192.168.1.0/24
<http://192.168.1.0/24> network
Questions
1) Thus in a 2+1 Cluster ( 2 GPFS Server + 1 Quorum Server )
Config - Does the Tiebreaker Node needs to have access to the
daemon(data) 10.1.1. network or is it sufficient for the
tiebreaker node to be configured as part of the admin 192.168.1
network ?
2) Does a remote cluster needs access to the GPFS Admin 192.168.1
network or is it sufficient for the remote cluster to access the
10.1.1 network ? If so i assume that remotecluster commands and
ping to/from remote cluster are going via the Daemon network ?
Note:
I am aware and read
https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/General%20Parallel%20File%20System%20(GPFS)/page/GPFS%20Network%20Communication%20Overview
<https://www.ibm.com/developerworks/community/wikis/home?lang=en#%21/wiki/General%20Parallel%20File%20System%20%28GPFS%29/page/GPFS%20Network%20Communication%20Overview>
--
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