For a MySQL cluster I use one SQL Node and two DataNodes.
On one Data Node I have started the linux command tcpdump and have observed the communication between the SQL and Data Node while I have enter a single select statement
(SELECT * FROM items WHERE itemID=1111;)
I would expect to see only one data packet with itemID= 1111 send from the Data Node to the SQL Node, but there are a lot of data packets with other itemIDs.
Is this normal?