What happens when a shard is down or slow when querying?
Answer / Ram Niwas Paswan
When a shard is down or slow, it can impact the overall performance of MongoDB. If a shard is down, queries that should be routed to that shard will fail and need to be handled with appropriate error handling logic in your application. If a shard is slow, it may cause increased query latency as other operations wait for responses from the slow shard.
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