AWS用使多个EBS做Raid0来提高IO
aws上创建raid0:
mdadm --create /dev/md0 --level=0 -c256 --raid-devices=8 /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm
echo 'DEVICE /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm' > /etc/mdadm.conf
mdadm --detail --scan >> /etc/mdadm.conf
blockdev --setra 65536 /dev/md0
mkfs -t ext3 /dev/md0
mount /dev/md0 /data1/test
下面是速度测试，IO只提高了不到一倍，没有达到理想的状态。不过聊胜于无了。
[root@ip-10-160-206-223 data1]# bonnie++ -s 2048 -r 512 -d /data1/test/ -m raid0 -u root
Using uid:0, gid:0.
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.03e ------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
raid0 2G 83720 95 813061 95 1185231 100 84567 97 2828489 97 1187 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 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
raid0,2G,83720,95,813061,95,1185231,100,84567,97,2828489,97,1187.5,0,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
[root@ip-10-160-206-223 data1]# bonnie++ -s 2048 -r 512 -d /data1/test/ -m raid0 -u root -b
Using uid:0, gid:0.
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.03e ------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
raid0 2G 87919 99 55024 6 56396 5 88632 99 2981975 99 +++++ +++
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 319 0 +++++ +++ 266 0 307 0 +++++ +++ 269 0
raid0,2G,87919,99,55024,6,56396,5,88632,99,2981975,99,+++++,+++,16,319,0,+++++,+++,266,0,307,0,+++++,+++,269,0
[root@ip-10-160-206-223 data1]# bonnie++ -s 2048 -r 512 -d /data2/test/ -m ebs -u root -b
Using uid:0, gid:0.
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.03e ------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
ebs 2G 78798 88 29578 3 36800 3 88879 99 3027079 99 +++++ +++
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 443 0 +++++ +++ 416 0 435 0 +++++ +++ 423 0
ebs,2G,78798,88,29578,3,36800,3,88879,99,3027079,99,+++++,+++,16,443,0,+++++,+++,416,0,435,0,+++++,+++,423,0
