Originally posted by: cp_

Hi Guys,

I'm planning to setup a 2 node GPFS cluster with node and disk majority.

So far, I have done the following:

• Create GPFS Cluster
• Add 2nd Node (Both are Active)

Now I'm at the step where you create NSD disks, I've been reading a multiple of articles online however can someone guide me how to setup a quorum disk? How will the the diskdesc will look like? Quorum = DiskDescriptor Only?

and Node Majority with 2x nodes - is it possible with 2x nodes or do i have to add the third node? and how the the nodes must be setup? 2x quorum-manager?

I would appreciate any input on the above

Thanks

cp_
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Originally posted by: SystemAdmin

i suggest you read the Concepts, Planning, and Installation Guide and come back then with a narrower scope question unless you want to ask for a quote on a paid coaching session.

peace
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Originally posted by: cp_

Delgado,

Thanks for your input, I've read Concepts, Planning and Installation Guide - this is the setup I'm thinking about:

Nodes Setup:

node1:quorum/manager
node2:quorum/manager

NSD Setup:

hdisk1:dataAndmetadata
hdisk2:FSDescriptor <--- Is this this right configuration to setup the quorum disk?

Regards

cp_
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Originally posted by: SystemAdmin

you obviously have read the guide with as much concentration as my post
EOM
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Originally posted by: MatthewBourne

Have a look at the runes for the mmchconfig command
M.
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Originally posted by: cp_

Thanks Matthew,

I've done the following, mmchconfig tiebreakerDisks="nsd2"

The disk seems set as a tiebreaker disk, when node1 is off or vice-versa the /gpfs partition is still available. However i would like to make sure the tiebreaker is set correctly to avoid the spli brain scenario - unfortunatley the guides does not seems to explain this clearly.
"tiebreakerDisks
Controls whether GPFS will use the node quorum with tiebreaker algorithm in place of the regular node based quorum algorithm. See General Parallel File System: Concepts, Planning, and Installation Guide and search for node quorum with tiebreaker. To enable this feature, specify the names of one or three disks. Separate the NSD names with semicolon (;) and enclose the list in quotes. The disks do not have to belong to any particular file system, but must be directly accessible from the quorum nodes. For example:
tiebreakerDisks="gpfs1nsd;gpfs2nsd;gpfs3nsd"
To disable this feature, use:

tiebreakerDisks=no
When changing the tiebreakerDisks, GPFS must be down on all nodes in the cluster"
is the above enough to setup a tiebreaker disk?

regards

cp_
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