borgbackup/borg

restore big files/block devices with considering already present data

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#5,638 建立於 2021年1月20日

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 (5 留言) (0 反應) (1 負責人)Python (10,086 star) (732 fork)batch import
cmd: extractenhancementfilesystemhelp wanted

描述

I use borg to make backups of my LVM volumes. It works fine at backup creation time but not as good when I do 'borg extract'. It pulls many gigabytes of data from remote borg repo server although I still have an almost unchanged device in place.

It would be nice to have an option to not just extract data from a borg repo but to also check against an existing file/block device, if it already has the required data and only retrieve changed data from the remote repo.

貢獻者指南

技術棧
python
領域
backenddata
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
4
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
3-5 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
blocked
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
understanding of borg's extraction mechanismPythonblock device handling
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
20
研究方向
Investigate the borg extraction code in borg/archive.py and borg/extract.py. Understand how current extraction works and how to add an option to compare existing data before fetching chunks from remote. Review the issue comments for any prior discussion about implementation details. The feature requires modifying the extraction pipeline to check local data and only fetch missing or changed chunks.
restore big files/block devices with considering already present data · borgbackup/borg#5638 | Good First Issue