On 7/24/2010 10:44 PM, Dan Langille wrote:
You may have seen my cunning plan:
http://docs.freebsd.org/cgi/getmsg.cgi?fetch=883310+0+current/freebsd-stable
I've been doing some testing today. The first of my tests comparing
partitions aligned on a 4KB boundary are in. I created a 5x2TB zpool,
each of which was set up like this:
gpart add -b 1024 -s 3906824301 -t freebsd-zfs -l disk01 ada1
or
gpart add -b 34 -s 3906824301 -t freebsd-zfs -l disk01 ada1
Repeat for all 5 HDD. And then:
zpool create storage raidz2 gpt/disk01 gpt/disk02 gpt/disk03 gpt/disk04
gpt/disk05
Two Bonnie-64 tests:
First, with -b 34:
# ~dan/bonnie-64-read-only/Bonnie -s 5000
File './Bonnie.12315', size: 5242880000
Writing with putc()...done
Rewriting...done
Writing intelligently...done
Reading with getc()...done
Reading intelligently...done
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
GB M/sec %CPU M/sec %CPU M/sec %CPU M/sec %CPU M/sec %CPU /sec %CPU
5 110.6 80.5 115.3 15.1 60.9 8.5 68.8 46.2 326.7 15.3 469 1.4
And then with -b 1024
# ~dan/bonnie-64-read-only/Bonnie -s 5000
File './Bonnie.21095', size: 5242880000
Writing with putc()...done
Rewriting...^[[1~done
Writing intelligently...done
Reading with getc()...done
Reading intelligently...done
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
GB M/sec %CPU M/sec %CPU M/sec %CPU M/sec %CPU M/sec %CPU /sec %CPU
5 130.9 94.2 118.3 15.6 61.1 8.5 70.1 46.8 241.2 12.7 473 1.4
My reading of this: All M/sec rates are faster except sequential input.
Comments?
I'll run -s 20000 and -s 50000 tests overnight and will post them in the
morning.
Well, it seems I'm not sleeping yet, so:
-b 34
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
GB M/sec %CPU M/sec %CPU M/sec %CPU M/sec %CPU M/sec %CPU /sec %CPU
50 113.1 82.4 114.6 15.2 63.4 8.9 72.7 48.2 142.2 9.5 126 0.7
-b 1024
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
GB M/sec %CPU M/sec %CPU M/sec %CPU M/sec %CPU M/sec %CPU /sec %CPU
50 110.5 81.0 112.8 15.0 62.8 9.0 72.9 48.5 139.7 9.5 144 0.9
Here, the results aren't much better either... am I not aligning this
partition correctly? Missing something else? Or... are they both 4K
block aligned?
--
Dan Langille - http://langille.org/
_______________________________________________
freebsd-stable@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
