Re: btrfs vs ext4 benchmark

[Chris Mason <chris.mason@oracle.com>]

On Tue, 2009-04-07 at 13:47 +0200, Morten P.D. Stevens wrote:
> Update:
>=20
> And here the compilebench with options -i 90 and -r 150 (the same as =
oracle)
>=20

The difference in initial create times is pretty surprising.  My guess
is that single spindle duplication of metadata hurts more on this raid
array.

=46or the other times compilebench was actually written to make btrfs l=
ook
bad.  The main goal was to age and fragment the metadata, while
constantly clearing out the caches used to make things fast.

IOW, it was meant to be a worst case ;)  Some of these numbers look lik=
e
the cache clearing wasn't hitting ext4.  I'll rerun the test against
ext4 next week.

-chris

> btrfs:
>=20
> ./compilebench -D /btrfs/work2 -i 90 -r 150
>=20
> run complete:
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D
> intial create total runs 90 avg 45.18 MB/s (user 0.84s sys 2.89s)
> create total runs 20 avg 13.30 MB/s (user 0.88s sys 2.93s)
> patch total runs 24 avg 5.94 MB/s (user 0.34s sys 2.56s)
> compile total runs 23 avg 37.04 MB/s (user 0.19s sys 1.60s)
> clean total runs 14 avg 71.36 MB/s (user 0.03s sys 0.83s)
> read tree total runs 17 avg 7.02 MB/s (user 0.75s sys 3.26s)
> read compiled tree total runs 8 avg 16.27 MB/s (user 0.86s sys 4.83s)
> delete tree total runs 14 avg 21.51 seconds (user 0.45s sys 4.07s)
> delete compiled tree total runs 6 avg 29.23 seconds (user 0.57s sys 4=
=2E66s)
> stat tree total runs 14 avg 15.99 seconds (user 0.41s sys 1.31s)
> stat compiled tree total runs 10 avg 19.68 seconds (user 0.41s sys 1.=
51s)
>=20
>=20
> ext4:
>=20
> ./compilebench -D /mnt/work2 -i 90 -r 150
>=20
>=20
> run complete:
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D
> intial create total runs 90 avg 92.42 MB/s (user 0.76s sys 1.38s)
> create total runs 20 avg 52.06 MB/s (user 0.73s sys 1.26s)
> patch total runs 24 avg 17.28 MB/s (user 0.37s sys 0.96s)
> compile total runs 23 avg 85.64 MB/s (user 0.17s sys 1.05s)
> clean total runs 14 avg 887.53 MB/s (user 0.02s sys 0.11s)
> read tree total runs 17 avg 13.60 MB/s (user 0.79s sys 1.34s)
> read compiled tree total runs 8 avg 24.65 MB/s (user 0.95s sys 2.07s)
> delete tree total runs 14 avg 2.26 seconds (user 0.39s sys 0.78s)
> delete compiled tree total runs 6 avg 2.82 seconds (user 0.43s sys 0.=
91s)
> stat tree total runs 14 avg 1.71 seconds (user 0.38s sys 0.33s)
> stat compiled tree total runs 10 avg 1.99 seconds (user 0.42s sys 0.3=
3s)
>=20
>=20
> I=C2=B4m a little disappointed about the btrfs results.
> I was hopefully that btrfs is faster than ext4....
>=20
> -
>=20
> Morten
>=20
>=20
> 2009/4/4 Morten P.D. Stevens <mstevens@win-professional.com>:
> > Hi,
> >
> > here are some tests on an IBM server with btrfs vs. ext4.
> >
> > Kernel: 2.6.29.1
> > Benchmark software: compilerbench with options -i 10 -r 30
> > CPU: Intel Xeon Quadcore E5310
> > Chipset: Intel 5000
> > Memory: 4 GB FB-DIMM DDR2-667
> > HDDs: 2x WD6400AAKS @ Raid0
> > Storage Controller: IBM Serveraid 8k
> >
> > btrfs Result:
> >
> > intial create total runs 10 avg 50.89 MB/s (user 0.85s sys 2.59s)
> > create total runs 5 avg 23.62 MB/s (user 0.82s sys 2.55s)
> > patch total runs 4 avg 11.35 MB/s (user 0.38s sys 2.22s)
> > compile total runs 7 avg 66.33 MB/s (user 0.19s sys 1.32s)
> > clean total runs 4 avg 195.76 MB/s (user 0.03s sys 0.50s)
> > read tree total runs 2 avg 11.99 MB/s (user 0.66s sys 2.59s)
> > read compiled tree total runs 1 avg 30.14 MB/s (user 0.88s sys 3.64=
s)
> > delete tree total runs 2 avg 10.79 seconds (user 0.43s sys 3.39s)
> > no runs for delete compiled tree
> > stat tree total runs 4 avg 9.62 seconds (user 0.41s sys 1.03s)
> > stat compiled tree total runs 1 avg 10.51 seconds (user 0.49s sys 1=
=2E19s)
> >
> > ext4 Result:
> >
> > intial create total runs 10 avg 96.09 MB/s (user 0.77s sys 1.34s)
> > create total runs 5 avg 50.84 MB/s (user 0.82s sys 1.20s)
> > patch total runs 4 avg 20.17 MB/s (user 0.28s sys 1.04s)
> > compile total runs 7 avg 94.39 MB/s (user 0.17s sys 1.07s)
> > clean total runs 4 avg 959.66 MB/s (user 0.03s sys 0.11s)
> > read tree total runs 2 avg 14.67 MB/s (user 0.78s sys 1.26s)
> > read compiled tree total runs 1 avg 31.96 MB/s (user 0.87s sys 2.31=
s)
> > delete tree total runs 2 avg 2.14 seconds (user 0.34s sys 0.81s)
> > no runs for delete compiled tree
> > stat tree total runs 4 avg 1.82 seconds (user 0.40s sys 0.35s)
> > stat compiled tree total runs 1 avg 1.83 seconds (user 0.35s sys 0.=
33s)
> >
> > Best regards,
> >
> > Morten
> >
> >
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