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1st configuration: 4 cluster nodes, 3 instances per cluster node (quorum), 1 instance per cluster host node, 12 cluster host nodes; 2nd configuration: 4 cluster nodes, 3 instances per cluster node (quorum), 4 instances per cluster host node, 12 cluster host nodes: -- This is more to do with how many Virtuoso Server processes are running per cluster node. You will have more OS resources available as the Virtuoso instances are reduced. Ideally, you want to spread the instances over distinct machines so that you have resources pooled across those machines. One instance per cluster node will work better than Four instances per cluster node.

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  • 1st configuration: 4 cluster nodes, 3 instances per cluster node (quorum), 1 instance per cluster host node, 12 cluster host nodes; 2nd configuration: 4 cluster nodes, 3 instances per cluster node (quorum), 4 instances per cluster host node, 12 cluster host nodes: -- This is more to do with how many Virtuoso Server processes are running per cluster node. You will have more OS resources available as the Virtuoso instances are reduced. Ideally, you want to spread the instances over distinct machines so that you have resources pooled across those machines. One instance per cluster node will work better than Four instances per cluster node.
  • 1st configuration: 4 cluster nodes, 3 instances per cluster node (quorum), 1 instance per cluster host node, 12 cluster host nodes; 2nd configuration: 4 cluster nodes, 3 instances per cluster node (quorum), 4 instances per cluster host node, 12 cluster host nodes: -- This is more to do with how many Virtuoso Server processes are running per cluster node. You will have more OS resources available as the Virtuoso instances are reduced. Ideally, you want to spread the instances over distinct machines so that you have resources pooled across those machines. One instance per cluster node will work better than Four instances per cluster node.
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  • Performance/scalability between these 2 cluster configurations
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  • http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtClusteringDiagrams/elastic-ha-12-hosts-4-nodes-of-3-instance-quorums.png
  • http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtClusteringDiagrams/elastic-ha-3-hosts-4-nodes-of-3-instance-quorums.png
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  • Answering the question: What is the differences in terms of performance/scalability between 2 cluster configurations?
  • Answering the question: What is the differences in terms of performance/scalability between 2 cluster configurations?
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