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From "Ivan Bessonov (Jira)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-14747) RocksDB research: configuration, lifecycle, basic integration
Date Thu, 03 Jun 2021 15:24:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-14747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17356511#comment-17356511

Ivan Bessonov commented on IGNITE-14747:

Few additions:
 * by default keys are sorted lexicographically;
 * this can be configured, but it's important to note that there's only one comparator per
RocksDB instance. We can't assign different comparators for different column families.

> RocksDB research: configuration, lifecycle, basic integration
> -------------------------------------------------------------
>                 Key: IGNITE-14747
>                 URL: https://issues.apache.org/jira/browse/IGNITE-14747
>             Project: Ignite
>          Issue Type: New Feature
>            Reporter: Sergey Chugunov
>            Assignee: Ivan Bessonov
>            Priority: Major
>              Labels: iep-74, ignite-3
>             Fix For: 3.0
> In accordance with [IEP-74|https://cwiki.apache.org/confluence/display/IGNITE/IEP-74+Data+Storage]
first implementation of persistent Storage will be based on RocksDB K-V storage.
> Thus research is needed on how to integrate it into ignite-3 realm. The following questions
should be covered:
> # What additional configuration properties are needed.
> # How to reconcile lifecycle of RocksDB instance with Ignite node lifecycle.
> # How RocksDB abstractions (e.g. partitions) match with Ignite abstractions.
> Also scope of tasks to implement basic Storage API over RocksDB should be defined.

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