* copy / move reflink files to new filesystem / or whole fs
@ 2021-06-15 5:45 Ralf Groß
2021-06-15 15:23 ` Darrick J. Wong
0 siblings, 1 reply; 2+ messages in thread
From: Ralf Groß @ 2021-06-15 5:45 UTC (permalink / raw)
To: linux-xfs
Hi,
is there any way to copy or move data between 2 xfs fs with reflinks
on the same host, so that the data is not rehydrated (I guess cp
--reflink will not be working)? If this is not possible, would it be
able to clone the existing fs to a new one and then continue to use
both?
Background: I've backup data on a 350 TB reflink xfs fs, now a second
fs will be added to the server and parts of existing data should be
moved to it. If it's possible to clone the whole fs I could delete
parts of it afterwards, but copying/moving single directories would be
easier.
Ralf
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: copy / move reflink files to new filesystem / or whole fs
2021-06-15 5:45 copy / move reflink files to new filesystem / or whole fs Ralf Groß
@ 2021-06-15 15:23 ` Darrick J. Wong
0 siblings, 0 replies; 2+ messages in thread
From: Darrick J. Wong @ 2021-06-15 15:23 UTC (permalink / raw)
To: Ralf Groß; +Cc: linux-xfs
On Tue, Jun 15, 2021 at 07:45:59AM +0200, Ralf Groß wrote:
> Hi,
>
> is there any way to copy or move data between 2 xfs fs with reflinks
> on the same host, so that the data is not rehydrated (I guess cp
> --reflink will not be working)? If this is not possible, would it be
> able to clone the existing fs to a new one and then continue to use
> both?
>
> Background: I've backup data on a 350 TB reflink xfs fs, now a second
> fs will be added to the server and parts of existing data should be
> moved to it. If it's possible to clone the whole fs I could delete
> parts of it afterwards, but copying/moving single directories would be
> easier.
Reflinking (aka data block sharing) can only be performed between files
within a single filesystem. You could use xfs_copy to clone the fs
which would be faster than dd, though not as fast as targeted copying of
parts of the directory tree as needed.
--D
>
> Ralf
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-06-15 5:45 copy / move reflink files to new filesystem / or whole fs Ralf Groß
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