Re: btrfs hash algorithm (should xxhash be the default?)

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On Mon, Feb 01, 2021 at 09:44:40AM -0500, Matthew Miller wrote:
> On Mon, Feb 01, 2021 at 03:16:32PM +0100, drago01 wrote:
> > Comparing the hash algorithms in isolation doesn't mean much - does it make
> > a difference if you try various file system workloads with the different
> > algorithms?
> 
> Probably? I'd have to make sample filesystems to test and don't have spare
> hardware for doing so at hand. I'm more interested in expanding from 32-bit
> to 64-bit and the speed increase is a pleasant surprise rather than the main
> goal.

RAM disks!

  # nbdkit memory 10G
  # nbd-client -b 512 localhost /dev/nbd0

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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