Vyacheslav Daradur created IGNITE-4501: ------------------------------------------
Summary: Improvement of connection in a cluster of new node Key: IGNITE-4501 URL: https://issues.apache.org/jira/browse/IGNITE-4501 Project: Ignite Issue Type: Improvement Reporter: Vyacheslav Daradur h3. Main description: Cluster nodes connect a ring. For example: we have 6 nodes: A, B, C, D, E, F. They can connect a ring in any possible way: A-B-C-D-E-F-A, or A-F-B-E-C-D-A, etc. If some node leaves topology, adjacent nodes must reconnect. If nodes A, B, C are in same physical place, nodes D, E, F are in other place, and places lost connect each other, we will have many ways of reconnections. At best case, if we had a ring: A-B-CxD-E-FxA ('x' means disconnect) -- then we have only one reconnect (C will be connected to A or F will be connected to D -- depends on what part of the cluster was alive. Also, if we had a not ring: AxFxBxExCxDxA -- then we have a lot of reconnections (A to B, B to C, C to A -- in general n/2 reconnections, where n -- number of nodes). h3. Approach: It is necessary to develop approach of node insertion to the correct place for creation of the correct ring-topology. h3. Solutions: Main idea is a sorting according to latency. * group nodes in arcs on an ARC_ID. (manualy?) * implement NodeComparator (nodes on the same host : nodes on the same subnet : other nodes). We will use it when we connect a new node. * [dev list thread|http://mail-archives.apache.org/mod_mbox/ignite-dev/201612.mbox/%3CCAN+WSNyWYXSXEBpGErVt72zTgi2pTQzUWLv8JY=ke83-5-r...@mail.gmail.com%3E] -- This message was sent by Atlassian JIRA (v6.3.4#6332)