Hi all,
Thanks a lot for the great feedback from before the weekend. Since one
of my colleagues needed the machine, I could only do the tests today.
In short: just installing 2.6.35 did make some difference, but I was
mostly impressed with the speedup gained by the hardware acceleration of
the
Jens Axboe ax...@kernel.dk writes:
Also, I didn't see Chris mention this, but if you have a newer intel box
you can use hw accellerated crc32c instead. For some reason my test box
always loads crc32c and not crc32c-intel, so I need to do that manually.
I have a patch for that, will post it
On 08/08/2010 03:18 AM, Andi Kleen wrote:
Jens Axboe ax...@kernel.dk writes:
Also, I didn't see Chris mention this, but if you have a newer intel box
you can use hw accellerated crc32c instead. For some reason my test box
always loads crc32c and not crc32c-intel, so I need to do that
On Thu, Aug 05, 2010 at 11:21:06PM +0200, Freek Dijkstra wrote:
Chris Mason wrote:
Basically we have two different things to tune. First the block layer
and then btrfs.
And then we need to setup a fio job file that hammers on all the ssds at
once. I'd have it use adio/dio and talk
On 2010-08-05 16:51, Chris Mason wrote:
And then we need to setup a fio job file that hammers on all the ssds at
once. I'd have it use adio/dio and talk directly to the drives. I'd do
something like this for the fio job file, but Jens Axboe is cc'd and he
might make another suggestion on the
On Fri, Aug 06, 2010 at 01:55:21PM +0200, Jens Axboe wrote:
On 2010-08-05 16:51, Chris Mason wrote:
And then we need to setup a fio job file that hammers on all the ssds at
once. I'd have it use adio/dio and talk directly to the drives. I'd do
something like this for the fio job file, but
Hello,
freek.dijks...@sara.nl (Freek Dijkstra) writes:
[...]
Here are the exact settings:
~# mkfs.btrfs -d raid0 /dev/sdd /dev/sde /dev/sdf /dev/sdg \
/dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm \
/dev/sdn /dev/sdo /dev/sdp /dev/sdq /dev/sdr /dev/sds
nodesize
Chris, Daniel and Mathieu,
Thanks for your constructive feedback!
On Thu, Aug 05, 2010 at 04:05:33PM +0200, Freek Dijkstra wrote:
ZFS BtrFS
1 SSD 256 MiByte/s 256 MiByte/s
2 SSDs 505 MiByte/s 504 MiByte/s
3 SSDs 736 MiByte/s 756 MiByte/s
4
