Re: Copying between lzo compressed BtrFS's: de/re-compressing.

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Thanks, Filipe ^_^

2016-01-15 15:25 GMT+03:00 Filipe Manana <fdmanana@xxxxxxxxx>:
> On Fri, Jan 15, 2016 at 9:56 AM, Timofey Titovets <nefelim4ag@xxxxxxxxx> wrote:
>> 2016-01-15 12:00 GMT+03:00 Diagon <kernel.boxy@xxxxxxxx>:
>>> I'm copying a large number of files between two lzo compressed BtrFS
>>> filesystems on different drives mounted on the same machine. It appears
>>> that the files are being de/re-compressed. Is there a way avoid this?
>>
>> If you just copy files, files will be decompressed while reading and
>> recompressed while writing
>> For avoiding this, you must use send receive feature
>
> No, send/receive does not avoid decompression on the send side nor
> re-compression at the receiving side. The receiving side writes the
> data from a send stream, which is uncompressed, to the destination
> filesystem using standard system calls like write/pwrite.
>
>>
>>
>> --
>> Have a nice day,
>> Timofey.
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
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>
>
>
> --
> Filipe David Manana,
>
> "Reasonable men adapt themselves to the world.
>  Unreasonable men adapt the world to themselves.
>  That's why all progress depends on unreasonable men."



-- 
Have a nice day,
Timofey.
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