[mod_cluster-issues] [JBoss JIRA] (MODCLUSTER-449) Implement ramp-up when starting new nodes
Michal Babacek (JIRA)
issues at jboss.org
Fri Feb 13 06:52:49 EST 2015
[ https://issues.jboss.org/browse/MODCLUSTER-449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13040112#comment-13040112 ]
Michal Babacek commented on MODCLUSTER-449:
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Wouldn't it be better addressed in the native part? The problem is not the load number itself, it's the {{elected}} counter. I suggest treating "newcomers" gently in {{internal_find_best_byrequests}}. IMHO one could guess that info from a large discrepancy between the elected counters of other nodes and this new one. I'm gonna try to verify I'm not just being full of ideas...
> Implement ramp-up when starting new nodes
> -----------------------------------------
>
> Key: MODCLUSTER-449
> URL: https://issues.jboss.org/browse/MODCLUSTER-449
> Project: mod_cluster
> Issue Type: Feature Request
> Components: Core & Container Integration (Java)
> Reporter: Radoslav Husar
> Assignee: Radoslav Husar
> Priority: Critical
> Fix For: 1.3.1.Beta3
>
>
> IIUC this has been a problem since inception. The problem is that the initial load stays in effect for performing load-balancing decisions until a new stat interval kicks in.
> This effect is mitigated by load decay over time, but for the time a new node joins in, it can get overloaded upon startup.
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