mongodb 1个分片的磁盘满了，会自动将插入操作引导到第2个分片上吗？

Question

2个分片，发现插入操作的目标多数是分片1，导致分片1的磁盘马上就满了

如果满了，会自动将后来的插入操作引导到分片2吗？还是报错、溢出？

Answer 1

After sharding, the data is inserted into shard 1. Explain that there is a problem with sharding

sh.status() Check it

Answer 2

If the shard key is not established correctly, the sharded data will be uneven
But it’s not absolutely uniform

Answer 3

I have tested on the server. Since a mongod node is running, a journal file needs to be maintained for database operation replay. This journal file needs to occupy a certain amount of disk space, so when the disk space is insufficient, the mongod node will exit. My server originally had 4 mongod nodes and a configsvr running on it. However, after the disk became full, only 3 mongod nodes were left.