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From "Anton Kalashnikov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-8571) Baseline auto-adjust feature
Date Mon, 18 Feb 2019 15:04:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-8571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16771149#comment-16771149
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Anton Kalashnikov commented on IGNITE-8571:
-------------------------------------------

[~ibessonov], thanks for notes I have fixed it.

> Baseline auto-adjust feature
> ----------------------------
>
>                 Key: IGNITE-8571
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8571
>             Project: Ignite
>          Issue Type: New Feature
>            Reporter: Eduard Shangareev
>            Assignee: Anton Kalashnikov
>            Priority: Major
>              Labels: IEP-4, Phase-2
>             Fix For: 2.8
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Now we have only one way to change BLAT - manually update it via console.sh or API.
> We need to add the possibility to change it automatically. Adjust to current topology.
> So, I propose 2 new distributed parameters which would be responsible to tune this feature.
> 1. Flag autoAdjustEnabled - true/false. Easy. Manual baseline control or auto adjusting
baseline.
> 2. autoAdjustTimeout - time which we would wait after the actual topology change. But
it would be reset if new discovery event happened. (node join/exit).
> We need to change API next way:
> org.apache.ignite.IgniteCluster:
> * isBaselineAutoAdjustEnabled()
> * setBaselineAutoAdjustEnabled(boolean enabled);
> * setBaselineAutoAdjustTimeout(long timeoutInMs);
> Also, we need to ensure that all nodes would have the same parameters(distributed parameters).
> And we should be able to survive coordinator left during parameters changes.
> When autoAdjustEnabled is true we should be block ability to manual baseline change.



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