pingcap/tidb

br: open format file generation by backup

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#58,611 opened on 2024年12月30日

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help wantedtype/feature-request

説明

Feature Request

Is your feature request related to a problem? Please describe:

Currently, there is no native tidb tool to export tikv data into open format files, like parquet. Instead, tidb users need to use client like tispark etc to extract data and do the format conversion. And the long tech stack suffers from bad performance.

Describe the feature you'd like:

tidb can provide a native way to dump snapshot data and incremental data to open format files. A preferred way is to let backup to generate open format files directly, in other words, backup can support to generate either log/sst files or parquet files. A simple prototype code is here https://github.com/BornChanger/sampleParquet.

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

コントリビューターガイド

技術スタック
go
領域
databasedatabackend
Issue 種別
feature
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
4
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
over 1 week
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
fresh
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
clear
前提条件
GolangTiDB backup internalsParquet file format
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
20
調査方針
The issue requests adding native Parquet export to TiDB backup. The prototype code at https://github.com/BornChanger/sampleParquet provides a starting point. The implementation will likely involve modifying the backup module (e.g., `br` in the TiDB repository) to write Parquet files instead of SST or log files. Look into how backup currently writes data and explore the Parquet Go library (e.g., apache/arrow go) for integration. The feature requires understanding of both TiDB's snapshot/incremental backup mechanisms and Parquet schema generation.