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https://issues.apache.org/jira/browse/IGNITE-11416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16808458#comment-16808458
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Ivan Bessonov commented on IGNITE-11416:
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[~akalashnikov], [~DmitriyGovorukhin]
I improved new test just like you asked, please take a look. Otherwise it feels
like we can finally merge these changes.
> DistributedMetaStorage improvements
> -----------------------------------
>
> Key: IGNITE-11416
> URL: https://issues.apache.org/jira/browse/IGNITE-11416
> Project: Ignite
> Issue Type: Improvement
> Reporter: Ivan Bessonov
> Assignee: Ivan Bessonov
> Priority: Major
> Fix For: 2.8
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> We need following improvements:
> * do not write the same value twice in a row, this would lead to history
> pollution;
> * add "putAll" functionality on binary level, not in public API yet. This
> would simplify the migration in future;
> * do not use "*HistoryItem" class for everything, this is not conventional;
> * retrieve "dmsVer" from cluster on handshake, this would help to reduce
> joining node DataBag size drastically;
> * add "isEmpty()" or "long getVersion()" method to metastorage, will be
> helpful for components that use it;
> * there has to be an ability to read data on client nodes, maybe write as
> well, not sure yet;
> * implement more optimal in-memory storage for history cache;
> * start in-memory metastorage at proper time, current implementation does it
> a bit too late.
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