On Tue, 19 Jan 2010, Jens_Heinz at Dell.com wrote:
>Of course there should be. Unfortunately I never had a chance to try how
>big the performance gain will be.
>But maybe someone else here can answer that.
We received a new R510 with a MD1000 last week, so I did some performance
testing.
The R510 has a single E5520 and 16GB memory and running RHEL 5.4.
the MD1000 has 15 SAS 1TB disk.
===raid6===(15disk)
==with "blockdev --setra 16384" / "mkfs.xfs -d su=64k,sw=13 /dev/sdc1 -f -i
size=512"
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
opslag.theva 32088M 88679 99 499080 53 257350 29 79273 99 935860 45 924.7
0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 +++++ +++ +++++ +++ 32737 91 24767 97 +++++ +++ 27652 97
opslag.thevalley.local,32088M,88679,99,499080,53,257350,29,79273,99,935860,45,924.7,0,16,+++++,+++,+++++,+++,32737,91,24767,97,+++++,+++,27652,97
=======================
===raid6===(15disk/redundant sas)
==with "blockdev --setra 16384" / "mkfs.xfs -d su=64k,sw=13 /dev/sdc1 -f -i
size=512"
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
opslag.theva 32088M 84710 99 493585 58 261930 30 79131 99 1131421 59 923.4
0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 +++++ +++ +++++ +++ +++++ +++ 27882 99 +++++ +++ 28744 98
opslag.thevalley.local,32088M,84710,99,493585,58,261930,30,79131,99,1131421,59,923.4,0,16,+++++,+++,+++++,+++,+++++,+++,27882,99,+++++,+++,28744,98
=======================
And also RAID50 and RAID0 benchmarks, but without any performance tweaks. (but
all with aligned partition/lvm)
We did this to test if we would go for RAID50 or RAID6
===raid50===(14disk)
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
opslag.theva 32088M 88513 99 651777 65 125296 13 66391 94 432141 16 712.3
0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 +++++ +++ +++++ +++ 29574 97 27544 99 +++++ +++ 29659 84
opslag.thevalley.local,32088M,88513,99,651777,65,125296,13,66391,94,432141,16,712.3,0,16,+++++,+++,+++++,+++,29574,97,27544,99,+++++,+++,29659,84
=======================
===raid0===(15disk)
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
opslag.theva 32088M 88257 99 764603 75 111148 10 56477 89 360101 10 704.9
0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 31703 100 +++++ +++ 31370 85 24680 99 +++++ +++ 28337 98
opslag.thevalley.local,32088M,88257,99,764603,75,111148,10,56477,89,360101,10,704.9,0,16,31703,100,+++++,+++,31370,85,24680,99,+++++,+++,28337,98
=======================
===raid6===(15disk)
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
opslag.theva 32088M 87491 99 499965 53 94219 8 55982 89 363572 11 690.7 0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 +++++ +++ +++++ +++ 31512 55 26047 99 +++++ +++ 28456 41
opslag.thevalley.local,32088M,87491,99,499965,53,94219,8,55982,89,363572,11,690.7,0,16,+++++,+++,+++++,+++,31512,55,26047,99,+++++,+++,28456,41
=======================
Stephan
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