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From "Alexey Goncharuk (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-10900) Print a warning if native persistence is used without an explicit consistent ID
Date Thu, 07 Mar 2019 09:28:00 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-10900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alexey Goncharuk updated IGNITE-10900:
--------------------------------------
    Fix Version/s: 2.8

> Print a warning if native persistence is used without an explicit consistent ID
> -------------------------------------------------------------------------------
>
>                 Key: IGNITE-10900
>                 URL: https://issues.apache.org/jira/browse/IGNITE-10900
>             Project: Ignite
>          Issue Type: Bug
>            Reporter: Stanislav Lukyanov
>            Assignee: Alexey Goncharuk
>            Priority: Major
>             Fix For: 2.8
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Experience shows that when Native Persistence is enabled, it is better to explicitly
set ConsistentIDs than use the autogenerated ones.
> First, it simplifies managing the baseline topology. It is much easier to manage it via
control.sh when the nodes have stable and meaningful names.
> Second, it helps to avoid certain shoot-yourself-in-the-foot issues. E.g. if one loses
all the data of a baseline node, when that node is restarted it doesn't have its old autogenerated
consistent ID - so it is not a part of the baseline anymore. This may be unexpected and confusing.
> Finally, having explicit consistent IDs improves the general stability of the setup -
one knows what the the set of nodes, where they run and what they're called.
> All in all, it seems beneficial to urge users to explicitly configure consistent IDs.
We can do this by introducing a warning that is printed every time a new consistent ID is
automatically generated. It should also be printed when a node doesn't have an explicit consistent
ID and picks up one from an existing peristence folder.



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