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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-7748) MVCC TX Implement TxLog related stuctures
Date Thu, 16 Aug 2018 15:30:01 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-7748?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Vladimir Ozerov updated IGNITE-7748:
    Component/s: mvcc

> MVCC TX Implement TxLog related stuctures
> -----------------------------------------
>                 Key: IGNITE-7748
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7748
>             Project: Ignite
>          Issue Type: Task
>          Components: cache, mvcc
>            Reporter: Igor Seliverstov
>            Assignee: Igor Seliverstov
>            Priority: Major
> Create TxLog on the basis of BPlusTree.
> The key is a pair of two long (which correspond to crd version and mvcc cntr of MvccVersion)
> The value is TxState - an enum.
> TxState has next possible values : PREPARED, COMMITTED, ABORTED, NA.
> NA is a special value, which is returned when there is no info about requested TX.
> TxLog is managed by MvccProcessor and initiated along with MvccProcessor.
> At the first step there is no special WAL records corresponding to TxLog operation (will
be implemented in future.

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