Speedup copying on btrfs #42

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bwaegeneire wants to merge 1 commit from cp-reflink into master

bwaegeneire commented

2020-09-28 12:23:24 +02:00

Owner

Copying on filesystems like BTRFS should be significantly faster with --reflink:

When --reflink[=always] is specified, perform a lightweight copy,
where the data blocks are copied only when modified. If this is not
possible the copy fails, or if --reflink=auto is specified, fall back
to a standard copy. Use --reflink=never to ensure a standard copy is
performed.

https://man7.org/linux/man-pages/man1/cp.1.html

Copying on filesystems like BTRFS should be significantly faster with `--reflink`: > When --reflink[=always] is specified, perform a lightweight copy, > where the data blocks are copied only when modified. If this is not > possible the copy fails, or if --reflink=auto is specified, fall back > to a standard copy. Use --reflink=never to ensure a standard copy is > performed. https://man7.org/linux/man-pages/man1/cp.1.html

jlecour commented

2020-09-28 13:46:48 +02:00

Owner

We've verified that the tests are still OK.

But, we've also tested on an heavily loaded server and there is no evident gain.

It seems preferable to keep it as simple as possible, so we won't merge this.

That said, it was interresting to look into this kind of optimization, the context and the implementation ;)

We've verified that the tests are still OK. But, we've also tested on an heavily loaded server and there is no evident gain. It seems preferable to keep it as simple as possible, so we won't merge this. That said, it was interresting to look into this kind of optimization, the context and the implementation ;)

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