Re: out-of-band dedup status?

[Adam Borowski <kilobyte@angband.pl>]

On Thu, Dec 08, 2016 at 03:15:38PM -0500, Jeff Mahoney wrote:
> On 12/8/16 1:36 PM, Christoph Anton Mitterer wrote:
> > I just wondered whether out-of-band/"offline" dedup is safe for general
> > use... https://btrfs.wiki.kernel.org/index.php/Status kinda implies so
> > (it tells about unspecified performance issues), but this seems again
> > already outdated (kernel 4.7)...
> 
> SUSE supports it in SLE12 using our 3.12 and 4.4 -based kernels.  There
> haven't been a lot of changes to the kernel component of it.  It's
> pretty simple: check to see if the ranges are identical between two
> files and then reflink between them.
> 
> > Any other things in terms of possible issues, data corruption, etc.
> > that one should know when using deduplication?
> 
> There shouldn't be.  We haven't had any bug reports at SUSE.

I use it on busy machines on ancient kernels (3.14, one 3.13) without any
hint of problems other than dedupe itself being slow.


Meow!
-- 
u-boot problems can be solved with the help of your old SCSI manuals, the
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