Hi Tobias, if you need to do an initial loading of a big amount of data, please read the following section: https://apacheignite.readme.io/docs/streaming--cep
>BUT when I add one more client to try to increased (scale horizontally) >I clearly see that the INSERT speed decreases on the first client by a magnitude >(dropping about 7,500 inserts/second from it’s 19,000 !!!) you didn't scale it horizontally, you just added more load for one ignite server, if you need to scale it, you need to add more server nodes, you set backup==1, that means that you need to add at least 2 more nodes that see that it scales horizontally and linearly. >Although the total speed increases to around ~25,000 INSERTs / second, this is still not good, and does not scale very well. ignite scales pretty good, looks like *one* ignite server node reaches its limit, check cpu loading on the server node, I believe there would be 100% CPU utilization. So to scale it you need to add server nodes that will store data, because with you set up there's only 1 node that tries to handle traffic from 4 client nodes. Also, you might be reach network IO limit, anyway in this case you also need to add more server nodes to split network a traffic from 4 clients to several server nodes. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
