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purna ram
purna ram

Reputation: 450

How To assign priority to mongodb 3.2 replica?

I have mongodb database with replication(1 primary and 4 secondary machine named as node1, node2,node3, node4 and node5 ). I want to assign priority to nodes. If node1 goes down then node2 should become primary If node1 and node2 goes down then node3 should become primary and so on. I am trying to assign priority Using below command but it is not changing:

cfg = rs.conf()
cfg.members[0].priority = 20
cfg.members[1].priority = 15
cfg.members[2].priority = 10
cfg.members[3].priority = 5
cfg.members[4].priority = 1
rs.reconfig(cfg)

I am using Mongodb version: 3.2

Upvotes: 1

Views: 2560

Answers (1)

pl_rock
pl_rock

Reputation: 15792

You have to configure votes also.

cfg = rs.conf()
cfg.members[0].votes = 1;
cfg.members[0].priority = 20;
cfg.members[1].votes = 1;
cfg.members[1].priority = 15;
cfg.members[2].votes = 1;
cfg.members[2].priority = 10;
cfg.members[3].votes = 1
cfg.members[3].priority = 5;
cfg.members[4].votes = 1
cfg.members[4].priority = 1;
rs.reconfig(cfg);

IMPORTANT Changed in version 3.2:

Non-voting members must have

priority of 0. Members with priority greater than 0 cannot have 0 votes.

To configure a member as non-voting, set both its votes and priority values to 0.

Refer MongoDB Documentation for more info about votes and priority.

Upvotes: 4

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