[jira] [Resolved] (IGNITE-16666) [Native Persistence 3.0] Optimize fragment storage for TableDataIo

["Kirill Tkalenko (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-16666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kirill Tkalenko resolved IGNITE-16666.
--------------------------------------
    Resolution: Won't Do

Implemented in IGNITE-16280

> [Native Persistence 3.0] Optimize fragment storage for TableDataIo
> ------------------------------------------------------------------
>
>                 Key: IGNITE-16666
>                 URL: https://issues.apache.org/jira/browse/IGNITE-16666
>             Project: Ignite
>          Issue Type: Task
>            Reporter: Kirill Tkalenko
>            Priority: Major
>              Labels: ignite-3
>             Fix For: 3.0.0-alpha5
>
>
> It is necessary to optimize the storage and reading of fragments for *TableDataIo*.
> At the moment, the size of the data is: the size of the key array (4 bytes) + the key array + the size of the data array (4 bytes) + the value array.
> It is proposed to optimize this and use only the key size (4 bytes) + key array + value array, and store the key size in the header, thereby not fragmenting it.
> Also do key comparison across fragments instead of loading the entire key array from all fragments.
> Required methods:
> * *org.apache.ignite.internal.storage.pagememory.TableDataRowImpl#headerSize* - the size of the non-breaking header (4 bytes are needed);
> * *org.apache.ignite.internal.storage.pagememory.TableDataRowImpl#size* - do not store the size of the value array;
> * *org.apache.ignite.internal.storage.pagememory.io.TableDataIo#writeFragmentData* - writing fragments to pages;
> * *org.apache.ignite.internal.storage.pagememory.TableTree#getRowByLink* - reading fragments;
> * *org.apache.ignite.internal.storage.pagememory.PageMemoryPartitionStorageTest#testFragments*.



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