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Cluster node sizes are different

I have three node MariaDB Galera Cluster. At first the databases size in all the three nodes were same. However now it has been noticed that database size are different on three node. But the three status(wsrep_local_state_comment) of the three nodes are synced. Could you let me know whether it is an expected behavior?

Answer Answered by Jan Lindström in this comment.

Can you provide the ls -lsR --block-size=1 /var/lib/mysql/* output from all 3 nodes, it is interesting where the difference is, there can be difference e.g. in error log size.

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