KVM下raw和qcow2格式磁盘文件IO测试

1. Host OS 环境

• CPU: Intel Xeon E5620 2.40GHz
• MEM: 16GB
• DISK: 500GB SATA
• OS: CentOS5.7 64bit

2. Guest OS 环境

• CPU: 2 core
• MEM: 8GB
• DISK: 50GB raw/qcow2 virtio
• OS: Ubuntu 10.04.3 Server 64bit

3. 测试工具

Bonnie++ 1.96

测试命令：bonnie -b -u root -d /root/tmpfile/

4. 测试结果

Host OS

Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
Concurrency   1     -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
jsjcloud20   32088M   763  97 61169  13 34234   6  1541  78 110327   7 284.7  11
Latency             39625us    7351ms    3251ms   24187us     102ms     190ms

Version  1.96       ------Sequential Create------ --------Random Create--------
jsjcloud20          -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16    56   0 +++++ +++    57   0    57   0 +++++ +++    57   0
Latency              1016ms     895us     258ms     233ms      15us     233ms

Guest OS : raw virtio

Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
Concurrency   1     -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
hadoop1         16G   739  96  28405  7 18972   5  3841  96 83858  13 188.9  12
Latency             13992us     873ms   6533ms    18113us   93496ms     291ms

Version  1.96       ------Sequential Create------ --------Random Create--------
hadoop1             -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16    38   0 +++++ +++    53   0    38   0 +++++ +++    53   0
Latency               358ms     815us    1683ms     192ms    2205us    1733ms

Guest OS : qcow2 virtio

Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
Concurrency   1     -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
hadoop2         16G   599  89  2601   1 11303   6  3168  94 45889   7 156.6 2191
Latency             18105us   20413ms    8228ms   61058us     144ms     316ms

Version  1.96       ------Sequential Create------ --------Random Create--------
hadoop2             -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16    37   0 +++++ +++    49   0    37   0 +++++ +++    53   0
Latency               338ms     743us    1797ms     421ms    2768us    1329ms

综合

	字符写	block写	重写	字符读	block读	随机访问
Host	763	61169	34234	1541	110327	284.7
raw virtio	739	28405	18972	3841	83858	188.9
qcow2 virtio	599	2601	11303	3168	45889	156.6