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https://issues.apache.org/jira/browse/IGNITE-13684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17229318#comment-17229318
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Anton Kalashnikov commented on IGNITE-13684:
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[~ibessonov] changes look good to me. Can you only remove useless TODOs which I
emphasized in the pull-request?
[~sergey-chugunov] can you help with merge please?
> Prepare PageStore/B+Tree to usage outside of standart lifecycle
> ---------------------------------------------------------------
>
> Key: IGNITE-13684
> URL: https://issues.apache.org/jira/browse/IGNITE-13684
> Project: Ignite
> Issue Type: Sub-task
> Reporter: Anton Kalashnikov
> Assignee: Ivan Bessonov
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Right now, PageStore and some other classes which responsible for persistent
> too couple with many other dependencies which not allow to use it in
> different initial conditions(ex. defragmentation). So it is needed to
> refactor some places in order to improve this situation.
> Changes are:
> * static constant for cache group meta page;
> * PageStore allocation tracker replaced with a more generic LongConsumer do
> decouple it from metrics framework;
> * PageReadWriteManager added to basically allow having same cache group in
> different data regions;
> * several methods and fields exposed as internally public/protected API;
> * several inner classes refactored so that they become static classes;
> * PageIOResolver interface created and used to make data structure more
> flexible;
> * InsertLast interface for B+Tree added that will optimize comparisons on
> inserts. Unused for now;
> * All this code doesn't affect existing behavior.
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