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https://issues.apache.org/jira/browse/GIRAPH-1034?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dionysios Logothetis resolved GIRAPH-1034.
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Resolution: Fixed
> Allow IPs for Worker2Worker communication
> -----------------------------------------
>
> Key: GIRAPH-1034
> URL: https://issues.apache.org/jira/browse/GIRAPH-1034
> Project: Giraph
> Issue Type: Improvement
> Reporter: Sergey Edunov
> Assignee: Sergey Edunov
> Priority: Major
>
> For worker2worker communication, we use O(n^2) DNS lookups, where n is the
> number of workers. If network infrastructure is less reliable, combined with
> a large number of workers, these DNS lookups occasionally fail.
> Fortunately, we don't always need DNS lookups, as in many clusters hosts can
> communicate with each other directly using IP addresses. Let's add a
> configuration option to use IP address instead of the host name.
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