[jira] [Assigned] (IGNITE-6418) Binary: optionally write integer datatypes with varint encoding

["Vyacheslav Daradur (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-6418?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vyacheslav Daradur reassigned IGNITE-6418:
------------------------------------------

    Assignee: Vyacheslav Daradur

> Binary: optionally write integer datatypes with varint encoding
> ---------------------------------------------------------------
>
>                 Key: IGNITE-6418
>                 URL: https://issues.apache.org/jira/browse/IGNITE-6418
>             Project: Ignite
>          Issue Type: Task
>          Components: binary
>    Affects Versions: 2.1
>            Reporter: Vladimir Ozerov
>            Assignee: Vyacheslav Daradur
>            Priority: Major
>              Labels: iep-2
>
> Currently all integer data types are written as is. {{Integer}} always takes 4 bytes, {{Long}} - 8 bytes, etc.
> There is well-known technique called "varint encoding" which can compress integer values [1]. When used, {{Integer}} can take 1-5 bytes, {{Long}} - 1-10 bytes. So when values are small enough we can save a lot of space. 
> But this technique is not unversal, as big encoded values might require more bytes comparing to plain form. Also it might cause slowdowns in SQL engine. So this approach cannot be applied globally. Instead, we should allow users to control whether they want to use this technique or not.
> One possible approach is to add some annotation and several new methods to {{BinaryWriter}} and {{BinaryReader}}, which will control whether varint is used or not.
> [1] https://developers.google.com/protocol-buffers/docs/encoding#varints



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