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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5784) The length of the heartbeat cycle should be configurable.
Date Mon, 11 May 2009 10:47:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12707966#action_12707966

Steve Loughran commented on HADOOP-5784:

is the goal here to detect failures of data nodes, or to have an up to date track of which
task trackers have capacity?

> The length of the heartbeat cycle should be configurable.
> ---------------------------------------------------------
>                 Key: HADOOP-5784
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5784
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Owen O'Malley
> Currently, the hearbeat cycle is set to (# nodes / 100) in seconds. This can be too long
for clusters that need to run low latency jobs. We should make the number of heartbeats that
should arrive a second configurable.

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