Chris Mason wrote:
On Tue, Oct 21, 2008 at 05:20:03PM -0500, Steven Pratt wrote:
As discussed on the BTRFS conference call, myself and Kevin Corry have
set up some test machines for the purpose of doing performance testing
on BTRFS. The intent is to have a semi permanent setup that we can use
to test new features and code drops in BTRFS as well as to do
comparisons to other file systems. The systems are pretty much fully
automated for execution, so we should be able to crank out large numbers
of different benchmarks as well as keep up with GIT changes.
The data is hosted at http://btrfs.boxacle.net/. So far we have the data
for the single disk tests uploaded. We should be able to upload results
from the larger RAID config tomorrow.
Initial tests were done with the FFSB benchmark and we picked 5 common
workloads; create, random and sequential read, random write, and a mail
server emulation. We plan to expand this based on feedback to include
more FFSB tests and/or other workloads.
All runs have complete analysis data with them (iostat, mpstat,
oprofile, sar), as well as the FFSB profiles that can be used to
recreate any test we ran. We also have collected blktrace data but not
uploaded due to size.
Please follow the results link on the bottom of the main page to get to
the current results. Let me know what you like or don't like. I will
post again when we get the RAID data uploaded.
Very interesting data, thank you for posting this. The first comment
I'll make is that -o nodatacow requires -o nodatasum. The sums aren't
valid without the cow.
Thought that might be the case. Ok, we will drop this variation.
The FFSB mail server workload, does it do fsync writes?
No, but we have the ability to add that if we choose.
For the sequential read workload, I'm guessing (hoping) the files are
created in parallel?
Sorry, setup is still single threaded.
Steve
-chris
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