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MongoDB C100DBA Exam - Topic 6 Question 113 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 113
Topic #: 6
[All C100DBA Questions]

In a sharded cluster, from which node does one stop the balancer process before initiating backup?

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Suggested Answer: D

by Marge at Jul 09, 2025, 06:32 PM

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Eva
5 months ago
Really? I always thought it was the mongos node.
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Jade
5 months ago
Definitely B, the primary node is crucial!
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Katie
6 months ago
Wait, I thought it was any node?
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Sheridan
6 months ago
No way, it’s the config server for sure.
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Salley
6 months ago
You stop the balancer on the config server node.
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Asha
6 months ago
I’m a bit confused; I thought it was the mongos node, but now I’m second-guessing myself after reviewing the material.
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Vernice
7 months ago
I feel like it could be any node, but I think the config server is the most common answer for these types of questions.
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Stephania
7 months ago
I remember practicing a question about stopping the balancer, and it might have been related to the primary node.
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Linwood
7 months ago
I think we need to stop the balancer on the config server node, but I'm not entirely sure.
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Paulina
7 months ago
I remember from the MongoDB documentation that the balancer process is managed by the mongos nodes, which route client requests to the appropriate shards. So I think the answer is D, the mongos node.
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Ligia
7 months ago
The question mentions a "sharded cluster", so I'm guessing the balancer is running on one of the nodes in the cluster. My best guess would be the primary node of the replica set, since that's where the cluster coordination happens.
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Roslyn
8 months ago
Hmm, I'm not entirely sure about this one. I know the balancer is responsible for distributing data across the shards, but I'm not certain which node controls it. I'll have to think this through carefully.
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Bulah
8 months ago
I think the balancer process is managed at the config server level, so I'd stop it on the config server node before doing the backup.
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Elvera
10 months ago
I'm not sure, but I think it could be A) Any node, since any node can perform the balancer process.
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Valentine
10 months ago
I believe it's D) mongos node, as it's responsible for routing queries to the appropriate shard.
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Beatriz
10 months ago
Honestly, I'm just glad the question didn't involve configuring a cron job on a Solaris machine. That would have been a real head-scratcher.
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Willard
9 months ago
D) mongos node
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Dallas
9 months ago
C) config server node
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Vashti
9 months ago
A) Any node
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Pearline
10 months ago
I agree with Aretha, because config server node manages the sharding metadata.
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Deonna
10 months ago
Hmm, I'm torn between B and D. Maybe I should just flip a coin. Or, you know, actually study the material instead of relying on luck.
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Dierdre
8 months ago
You should definitely study the material instead of relying on luck.
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Wendell
8 months ago
I believe it's B) replicaset primary node.
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Ellen
9 months ago
I think it's D) mongos node.
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Reed
10 months ago
I'm going with C. The config server is the brain of the sharded cluster, so that's gotta be the node to stop the balancer on.
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Johana
9 months ago
I'm not sure, but I think it's safest to stop the balancer on the config server node.
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Socorro
9 months ago
I think it's C too. The config server manages the metadata for the sharded cluster.
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Aretha
10 months ago
I think it's C) config server node.
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Glory
10 months ago
D seems like the right choice to me. The mongos node is the entry point for the cluster, so that's where you'd want to stop the balancer.
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Makeda
10 months ago
Yes, that's right. The mongos node is responsible for routing queries in a sharded cluster.
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Alva
10 months ago
I think D is correct too. The mongos node is where the balancer should be stopped.
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Carin
11 months ago
I think the answer is B. The primary node in the replica set is the one responsible for balancing the data, so it makes sense to stop the balancer there before taking a backup.
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Sharmaine
9 months ago
I always stop the balancer on the config server node before taking a backup.
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Raymon
10 months ago
Actually, I think it's better to stop the balancer on any node in the sharded cluster.
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Malinda
10 months ago
I agree, stopping the balancer on the primary node is the way to go.
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