shutil: add reflink=False to file copy functions to control clone/CoW copies (use copy_file_range)
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performance
stdlib
type-feature
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- Python
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Description
| BPO | 37157 |
|---|---|
| Nosy | @giampaolo, @albertz, @desbma, @koobs, @pablogsal |
| Files |
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields:
assignee = None
closed_at = None
created_at = <Date 2019-06-04.21:36:40.594>
labels = ['library', '3.9', 'performance']
title = 'shutil: add reflink=False to file copy functions to control clone/CoW copies (use copy_file_range)'
updated_at = <Date 2021-10-07.19:23:42.385>
user = 'https://github.com/vstinner'
bugs.python.org fields:
activity = <Date 2021-10-07.19:23:42.385>
actor = 'vstinner'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2019-06-04.21:36:40.594>
creator = 'vstinner'
dependencies = []
files = ['48390', '48393']
hgrepos = []
issue_num = 37157
keywords = ['patch']
message_count = 14.0
messages = ['344648', '344651', '344667', '344692', '344694', '344697', '344702', '344709', '350623', '384015', '384105', '403414', '403418', '403423']
nosy_count = 6.0
nosy_names = ['giampaolo.rodola', 'Albert.Zeyer', 'desbma', 'koobs', 'pablogsal', 'dulanic']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'performance'
url = 'https://bugs.python.org/issue37157'
versions = ['Python 3.9']
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with Python's shutil file-copy functions and review the linked cow.diff and cow2.diff proposals. Trace how reflink=False should control clone/CoW copies through copy_file_range, then verify the intended behavior across the affected copy operations and their existing tests.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- operating-systems
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100