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https://issues.apache.org/jira/browse/IGNITE-4501?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Menshikov reassigned IGNITE-4501:
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Assignee: Alexander Menshikov
> 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
> Assignee: Alexander Menshikov
>
> 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]
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